diff --git a/hivesterix/hivesterix-common/pom.xml b/hivesterix/hivesterix-common/pom.xml
index 7741193..28305d7 100644
--- a/hivesterix/hivesterix-common/pom.xml
+++ b/hivesterix/hivesterix-common/pom.xml
@@ -63,9 +63,16 @@
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-exec</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hivesterix-serde</artifactId>
+			<version>0.2.7-SNAPSHOT</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/hivesterix/hivesterix-common/src/main/java/edu/uci/ics/hivesterix/logical/expression/ExpressionTranslator.java b/hivesterix/hivesterix-common/src/main/java/edu/uci/ics/hivesterix/logical/expression/ExpressionTranslator.java
index 783004c..2ec3811 100644
--- a/hivesterix/hivesterix-common/src/main/java/edu/uci/ics/hivesterix/logical/expression/ExpressionTranslator.java
+++ b/hivesterix/hivesterix-common/src/main/java/edu/uci/ics/hivesterix/logical/expression/ExpressionTranslator.java
@@ -12,212 +12,217 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.hivesterix.logical.expression;
-
-import java.util.ArrayList;
-import java.util.List;
-
-import org.apache.commons.lang3.mutable.Mutable;
-import org.apache.hadoop.hive.ql.exec.FunctionInfo;
-import org.apache.hadoop.hive.ql.exec.FunctionRegistry;
-import org.apache.hadoop.hive.ql.plan.AggregationDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeColumnDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeConstantDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeFieldDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeNullDesc;
-import org.apache.hadoop.hive.ql.plan.UDTFDesc;
-import org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator;
-import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
-import org.apache.hadoop.hive.ql.udf.generic.GenericUDTF;
-import org.apache.hadoop.hive.serde2.typeinfo.StructTypeInfo;
-import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
-import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
-
-import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalExpressionTag;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AbstractFunctionCallExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AggregateFunctionCallExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.ConstantExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.ScalarFunctionCallExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.UnnestingFunctionCallExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.VariableReferenceExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
-import edu.uci.ics.hyracks.algebricks.core.algebra.functions.IFunctionInfo;
-
-public class ExpressionTranslator {
-
-    public static Object getHiveExpression(ILogicalExpression expr, IVariableTypeEnvironment env) throws Exception {
-        if (expr.getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL) {
-            /**
-             * function expression
-             */
-            AbstractFunctionCallExpression funcExpr = (AbstractFunctionCallExpression) expr;
-            IFunctionInfo funcInfo = funcExpr.getFunctionInfo();
-            FunctionIdentifier fid = funcInfo.getFunctionIdentifier();
-
-            if (fid.getName().equals(ExpressionConstant.FIELDACCESS)) {
-                Object info = ((HiveFunctionInfo) funcInfo).getInfo();
-                ExprNodeFieldDesc desc = (ExprNodeFieldDesc) info;
-                return new ExprNodeFieldDesc(desc.getTypeInfo(), desc.getDesc(), desc.getFieldName(), desc.getIsList());
-            }
-
-            if (fid.getName().equals(ExpressionConstant.NULL)) {
-                return new ExprNodeNullDesc();
-            }
-
-            /**
-             * argument expressions: translate argument expressions recursively
-             * first, this logic is shared in scalar, aggregation and unnesting
-             * function
-             */
-            List<Mutable<ILogicalExpression>> arguments = funcExpr.getArguments();
-            List<ExprNodeDesc> parameters = new ArrayList<ExprNodeDesc>();
-            for (Mutable<ILogicalExpression> argument : arguments) {
-                /**
-                 * parameters could not be aggregate function desc
-                 */
-                ExprNodeDesc parameter = (ExprNodeDesc) getHiveExpression(argument.getValue(), env);
-                parameters.add(parameter);
-            }
-
-            /**
-             * get expression
-             */
-            if (funcExpr instanceof ScalarFunctionCallExpression) {
-                String udfName = HiveAlgebricksBuiltInFunctionMap.INSTANCE.getHiveFunctionName(fid);
-                GenericUDF udf;
-                if (udfName != null) {
-                    /**
-                     * get corresponding function info for built-in functions
-                     */
-                    FunctionInfo fInfo = FunctionRegistry.getFunctionInfo(udfName);
-                    udf = fInfo.getGenericUDF();
-
-                    int inputSize = parameters.size();
-                    List<ExprNodeDesc> currentDescs = new ArrayList<ExprNodeDesc>();
-
-                    // generate expression tree if necessary
-                    while (inputSize > 2) {
-                        int pairs = inputSize / 2;
-                        for (int i = 0; i < pairs; i++) {
-                            List<ExprNodeDesc> descs = new ArrayList<ExprNodeDesc>();
-                            descs.add(parameters.get(2 * i));
-                            descs.add(parameters.get(2 * i + 1));
-                            ExprNodeDesc desc = ExprNodeGenericFuncDesc.newInstance(udf, descs);
-                            currentDescs.add(desc);
-                        }
-
-                        if (inputSize % 2 != 0) {
-                            // List<ExprNodeDesc> descs = new
-                            // ArrayList<ExprNodeDesc>();
-                            // ExprNodeDesc lastExpr =
-                            // currentDescs.remove(currentDescs.size() - 1);
-                            // descs.add(lastExpr);
-                            currentDescs.add(parameters.get(inputSize - 1));
-                            // ExprNodeDesc desc =
-                            // ExprNodeGenericFuncDesc.newInstance(udf, descs);
-                            // currentDescs.add(desc);
-                        }
-                        inputSize = currentDescs.size();
-                        parameters.clear();
-                        parameters.addAll(currentDescs);
-                        currentDescs.clear();
-                    }
-
-                } else {
-                    Object secondInfo = ((HiveFunctionInfo) funcInfo).getInfo();
-                    if (secondInfo != null) {
-
-                        /**
-                         * for GenericUDFBridge: we should not call get type of
-                         * this hive expression, because parameters may have
-                         * been changed!
-                         */
-                        ExprNodeGenericFuncDesc hiveExpr = (ExprNodeGenericFuncDesc) ((HiveFunctionInfo) funcInfo)
-                                .getInfo();
-                        udf = hiveExpr.getGenericUDF();
-                    } else {
-                        /**
-                         * for other generic UDF
-                         */
-                        Class<?> udfClass;
-                        try {
-                            udfClass = Class.forName(fid.getName());
-                            udf = (GenericUDF) udfClass.newInstance();
-                        } catch (Exception e) {
-                            e.printStackTrace();
-                            throw new AlgebricksException(e.getMessage());
-                        }
-                    }
-                }
-                /**
-                 * get hive generic function expression
-                 */
-                ExprNodeDesc desc = ExprNodeGenericFuncDesc.newInstance(udf, parameters);
-                return desc;
-            } else if (funcExpr instanceof AggregateFunctionCallExpression) {
-                /**
-                 * hive aggregation info
-                 */
-                AggregationDesc aggregateDesc = (AggregationDesc) ((HiveFunctionInfo) funcExpr.getFunctionInfo())
-                        .getInfo();
-                /**
-                 * set parameters
-                 */
-                aggregateDesc.setParameters((ArrayList<ExprNodeDesc>) parameters);
-
-                List<TypeInfo> originalParameterTypeInfos = new ArrayList<TypeInfo>();
-                for (ExprNodeDesc parameter : parameters) {
-                    if (parameter.getTypeInfo() instanceof StructTypeInfo) {
-                        originalParameterTypeInfos.add(TypeInfoFactory.doubleTypeInfo);
-                    } else
-                        originalParameterTypeInfos.add(parameter.getTypeInfo());
-                }
-
-                GenericUDAFEvaluator eval = FunctionRegistry.getGenericUDAFEvaluator(
-                        aggregateDesc.getGenericUDAFName(), originalParameterTypeInfos, aggregateDesc.getDistinct(),
-                        false);
-
-                AggregationDesc newAggregateDesc = new AggregationDesc(aggregateDesc.getGenericUDAFName(), eval,
-                        aggregateDesc.getParameters(), aggregateDesc.getDistinct(), aggregateDesc.getMode());
-                return newAggregateDesc;
-            } else if (funcExpr instanceof UnnestingFunctionCallExpression) {
-                /**
-                 * type inference for UDTF function
-                 */
-                UDTFDesc hiveDesc = (UDTFDesc) ((HiveFunctionInfo) funcExpr.getFunctionInfo()).getInfo();
-                String funcName = hiveDesc.getUDTFName();
-                FunctionInfo fi = FunctionRegistry.getFunctionInfo(funcName);
-                GenericUDTF udtf = fi.getGenericUDTF();
-                UDTFDesc desc = new UDTFDesc(udtf);
-                return desc;
-            } else {
-                throw new IllegalStateException("unrecognized function expression " + expr.getClass().getName());
-            }
-        } else if ((expr.getExpressionTag() == LogicalExpressionTag.VARIABLE)) {
-            /**
-             * get type for variable in the environment
-             */
-            VariableReferenceExpression varExpr = (VariableReferenceExpression) expr;
-            LogicalVariable var = varExpr.getVariableReference();
-            TypeInfo typeInfo = (TypeInfo) env.getVarType(var);
-            ExprNodeDesc desc = new ExprNodeColumnDesc(typeInfo, var.toString(), "", false);
-            return desc;
-        } else if ((expr.getExpressionTag() == LogicalExpressionTag.CONSTANT)) {
-            /**
-             * get expression for constant in the environment
-             */
-            ConstantExpression varExpr = (ConstantExpression) expr;
-            Object value = ((HivesterixConstantValue) varExpr.getValue()).getObject();
-            ExprNodeDesc desc = new ExprNodeConstantDesc(value);
-            return desc;
-        } else {
-            throw new IllegalStateException("illegal expressions " + expr.getClass().getName());
-        }
-    }
-}
+package edu.uci.ics.hivesterix.logical.expression;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.commons.lang3.mutable.Mutable;
+import org.apache.hadoop.hive.ql.exec.FunctionInfo;
+import org.apache.hadoop.hive.ql.exec.FunctionRegistry;
+import org.apache.hadoop.hive.ql.plan.AggregationDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeColumnDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeConstantDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeFieldDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeNullDesc;
+import org.apache.hadoop.hive.ql.plan.UDTFDesc;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDTF;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
+import org.apache.hadoop.hive.serde2.typeinfo.StructTypeInfo;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
+
+import edu.uci.ics.hivesterix.serde.lazy.LazyUtils;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalExpressionTag;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AbstractFunctionCallExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AggregateFunctionCallExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.ConstantExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.ScalarFunctionCallExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.UnnestingFunctionCallExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.VariableReferenceExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.IFunctionInfo;
+
+public class ExpressionTranslator {
+
+    public static Object getHiveExpression(ILogicalExpression expr, IVariableTypeEnvironment env) throws Exception {
+        if (expr.getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL) {
+            /**
+             * function expression
+             */
+            AbstractFunctionCallExpression funcExpr = (AbstractFunctionCallExpression) expr;
+            IFunctionInfo funcInfo = funcExpr.getFunctionInfo();
+            FunctionIdentifier fid = funcInfo.getFunctionIdentifier();
+
+            if (fid.getName().equals(ExpressionConstant.FIELDACCESS)) {
+                Object info = ((HiveFunctionInfo) funcInfo).getInfo();
+                ExprNodeFieldDesc desc = (ExprNodeFieldDesc) info;
+                return new ExprNodeFieldDesc(desc.getTypeInfo(), desc.getDesc(), desc.getFieldName(), desc.getIsList());
+            }
+
+            if (fid.getName().equals(ExpressionConstant.NULL)) {
+                return new ExprNodeNullDesc();
+            }
+
+            /**
+             * argument expressions: translate argument expressions recursively
+             * first, this logic is shared in scalar, aggregation and unnesting
+             * function
+             */
+            List<Mutable<ILogicalExpression>> arguments = funcExpr.getArguments();
+            List<ExprNodeDesc> parameters = new ArrayList<ExprNodeDesc>();
+            for (Mutable<ILogicalExpression> argument : arguments) {
+                /**
+                 * parameters could not be aggregate function desc
+                 */
+                ExprNodeDesc parameter = (ExprNodeDesc) getHiveExpression(argument.getValue(), env);
+                parameters.add(parameter);
+            }
+
+            /**
+             * get expression
+             */
+            if (funcExpr instanceof ScalarFunctionCallExpression) {
+                String udfName = HiveAlgebricksBuiltInFunctionMap.INSTANCE.getHiveFunctionName(fid);
+                GenericUDF udf;
+                if (udfName != null) {
+                    /**
+                     * get corresponding function info for built-in functions
+                     */
+                    FunctionInfo fInfo = FunctionRegistry.getFunctionInfo(udfName);
+                    udf = fInfo.getGenericUDF();
+
+                    int inputSize = parameters.size();
+                    List<ExprNodeDesc> currentDescs = new ArrayList<ExprNodeDesc>();
+
+                    // generate expression tree if necessary
+                    while (inputSize > 2) {
+                        int pairs = inputSize / 2;
+                        for (int i = 0; i < pairs; i++) {
+                            List<ExprNodeDesc> descs = new ArrayList<ExprNodeDesc>();
+                            descs.add(parameters.get(2 * i));
+                            descs.add(parameters.get(2 * i + 1));
+                            ExprNodeDesc desc = ExprNodeGenericFuncDesc.newInstance(udf, descs);
+                            currentDescs.add(desc);
+                        }
+
+                        if (inputSize % 2 != 0) {
+                            // List<ExprNodeDesc> descs = new
+                            // ArrayList<ExprNodeDesc>();
+                            // ExprNodeDesc lastExpr =
+                            // currentDescs.remove(currentDescs.size() - 1);
+                            // descs.add(lastExpr);
+                            currentDescs.add(parameters.get(inputSize - 1));
+                            // ExprNodeDesc desc =
+                            // ExprNodeGenericFuncDesc.newInstance(udf, descs);
+                            // currentDescs.add(desc);
+                        }
+                        inputSize = currentDescs.size();
+                        parameters.clear();
+                        parameters.addAll(currentDescs);
+                        currentDescs.clear();
+                    }
+
+                } else {
+                    Object secondInfo = ((HiveFunctionInfo) funcInfo).getInfo();
+                    if (secondInfo != null) {
+
+                        /**
+                         * for GenericUDFBridge: we should not call get type of
+                         * this hive expression, because parameters may have
+                         * been changed!
+                         */
+                        ExprNodeGenericFuncDesc hiveExpr = (ExprNodeGenericFuncDesc) ((HiveFunctionInfo) funcInfo)
+                                .getInfo();
+                        udf = hiveExpr.getGenericUDF();
+                    } else {
+                        /**
+                         * for other generic UDF
+                         */
+                        Class<?> udfClass;
+                        try {
+                            udfClass = Class.forName(fid.getName());
+                            udf = (GenericUDF) udfClass.newInstance();
+                        } catch (Exception e) {
+                            e.printStackTrace();
+                            throw new AlgebricksException(e.getMessage());
+                        }
+                    }
+                }
+                /**
+                 * get hive generic function expression
+                 */
+                ExprNodeDesc desc = ExprNodeGenericFuncDesc.newInstance(udf, parameters);
+                return desc;
+            } else if (funcExpr instanceof AggregateFunctionCallExpression) {
+                /**
+                 * hive aggregation info
+                 */
+                AggregationDesc aggregateDesc = (AggregationDesc) ((HiveFunctionInfo) funcExpr.getFunctionInfo())
+                        .getInfo();
+                /**
+                 * set parameters
+                 */
+                aggregateDesc.setParameters((ArrayList<ExprNodeDesc>) parameters);
+
+                List<TypeInfo> originalParameterTypeInfos = new ArrayList<TypeInfo>();
+                for (ExprNodeDesc parameter : parameters) {
+                    if (parameter.getTypeInfo() instanceof StructTypeInfo) {
+                        originalParameterTypeInfos.add(TypeInfoFactory.doubleTypeInfo);
+                    } else
+                        originalParameterTypeInfos.add(parameter.getTypeInfo());
+                }
+
+                List<ObjectInspector> originalParameterOIs = new ArrayList<ObjectInspector>();
+                for (TypeInfo type : originalParameterTypeInfos) {
+                    originalParameterOIs.add(LazyUtils.getLazyObjectInspectorFromTypeInfo(type, false));
+                }
+                GenericUDAFEvaluator eval = FunctionRegistry.getGenericUDAFEvaluator(
+                        aggregateDesc.getGenericUDAFName(), originalParameterOIs, aggregateDesc.getDistinct(), false);
+
+                AggregationDesc newAggregateDesc = new AggregationDesc(aggregateDesc.getGenericUDAFName(), eval,
+                        aggregateDesc.getParameters(), aggregateDesc.getDistinct(), aggregateDesc.getMode());
+                return newAggregateDesc;
+            } else if (funcExpr instanceof UnnestingFunctionCallExpression) {
+                /**
+                 * type inference for UDTF function
+                 */
+                UDTFDesc hiveDesc = (UDTFDesc) ((HiveFunctionInfo) funcExpr.getFunctionInfo()).getInfo();
+                String funcName = hiveDesc.getUDTFName();
+                FunctionInfo fi = FunctionRegistry.getFunctionInfo(funcName);
+                GenericUDTF udtf = fi.getGenericUDTF();
+                UDTFDesc desc = new UDTFDesc(udtf);
+                return desc;
+            } else {
+                throw new IllegalStateException("unrecognized function expression " + expr.getClass().getName());
+            }
+        } else if ((expr.getExpressionTag() == LogicalExpressionTag.VARIABLE)) {
+            /**
+             * get type for variable in the environment
+             */
+            VariableReferenceExpression varExpr = (VariableReferenceExpression) expr;
+            LogicalVariable var = varExpr.getVariableReference();
+            TypeInfo typeInfo = (TypeInfo) env.getVarType(var);
+            ExprNodeDesc desc = new ExprNodeColumnDesc(typeInfo, var.toString(), "", false);
+            return desc;
+        } else if ((expr.getExpressionTag() == LogicalExpressionTag.CONSTANT)) {
+            /**
+             * get expression for constant in the environment
+             */
+            ConstantExpression varExpr = (ConstantExpression) expr;
+            Object value = ((HivesterixConstantValue) varExpr.getValue()).getObject();
+            ExprNodeDesc desc = new ExprNodeConstantDesc(value);
+            return desc;
+        } else {
+            throw new IllegalStateException("illegal expressions " + expr.getClass().getName());
+        }
+    }
+}
diff --git a/hivesterix/hivesterix-dist/pom.xml b/hivesterix/hivesterix-dist/pom.xml
index 8ecdfe1..83de061 100644
--- a/hivesterix/hivesterix-dist/pom.xml
+++ b/hivesterix/hivesterix-dist/pom.xml
@@ -25,260 +25,12 @@
 
 	<dependencies>
 		<dependency>
-			<groupId>javax.servlet</groupId>
-			<artifactId>servlet-api</artifactId>
-			<version>2.5</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
 			<groupId>junit</groupId>
 			<artifactId>junit</artifactId>
 			<version>4.8.1</version>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>args4j</groupId>
-			<artifactId>args4j</artifactId>
-			<version>2.0.12</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.json</groupId>
-			<artifactId>json</artifactId>
-			<version>20090211</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.eclipse.jetty</groupId>
-			<artifactId>jetty-server</artifactId>
-			<version>8.0.0.M1</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.eclipse.jetty</groupId>
-			<artifactId>jetty-servlet</artifactId>
-			<version>8.0.0.M1</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>jline</groupId>
-			<artifactId>jline</artifactId>
-			<version>0.9.94</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.datanucleus</groupId>
-			<artifactId>datanucleus-core</artifactId>
-			<version>2.0.3</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.datanucleus</groupId>
-			<artifactId>datanucleus-connectionpool</artifactId>
-			<version>2.0.3</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.datanucleus</groupId>
-			<artifactId>datanucleus-enhancer</artifactId>
-			<version>2.0.3</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.datanucleus</groupId>
-			<artifactId>datanucleus-rdbms</artifactId>
-			<version>2.0.3</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-dbcp</groupId>
-			<artifactId>commons-dbcp</artifactId>
-			<version>1.4</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-pool</groupId>
-			<artifactId>commons-pool</artifactId>
-			<version>1.5.4</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-collections</groupId>
-			<artifactId>commons-collections</artifactId>
-			<version>3.2.1</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-lang</groupId>
-			<artifactId>commons-lang</artifactId>
-			<version>2.4</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>javax</groupId>
-			<artifactId>jdo2-api</artifactId>
-			<version>2.3-ec</version>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>com.facebook</groupId>
-			<artifactId>libfb303</artifactId>
-			<version>0.5.0</version>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.thrift</groupId>
-			<artifactId>libthrift</artifactId>
-			<version>0.5.0</version>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.commons</groupId>
-			<artifactId>cli</artifactId>
-			<version>1.2</version>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache</groupId>
-			<artifactId>log4j</artifactId>
-			<version>1.2.15</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.antlr</groupId>
-			<artifactId>antlr-runtime</artifactId>
-			<version>3.0.1</version>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
-			<artifactId>hive-cli</artifactId>
-			<version>0.7.0</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
-			<artifactId>hive-common</artifactId>
-			<version>0.7.0</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
-			<artifactId>hive-exec</artifactId>
-			<version>0.7.0</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
-			<artifactId>hive-hwi</artifactId>
-			<version>0.7.0</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
-			<artifactId>hive-jdbc</artifactId>
-			<version>0.7.0</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
-			<artifactId>hive-metastore</artifactId>
-			<version>0.7.0</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
-			<artifactId>hive-service</artifactId>
-			<version>0.7.0</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
-			<artifactId>hive-shims</artifactId>
-			<version>0.7.0</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
-			<artifactId>hive-serde</artifactId>
-			<version>0.7.0</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.slf4j</groupId>
-			<artifactId>slf4j-api</artifactId>
-			<version>1.6.1</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-cli</groupId>
-			<artifactId>commons-cli</artifactId>
-			<version>1.2</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.slf4j</groupId>
-			<artifactId>slf4j-log4j12</artifactId>
-			<version>1.6.1</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-logging</groupId>
-			<artifactId>commons-logging</artifactId>
-			<version>1.1.1</version>
-			<type>jar</type>
-			<classifier>api</classifier>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>com.google.guava</groupId>
-			<artifactId>guava</artifactId>
-			<version>r06</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.antlr</groupId>
-			<artifactId>stringtemplate</artifactId>
-			<version>3.2</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.derby</groupId>
-			<artifactId>derby</artifactId>
-			<version>10.8.1.2</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
 			<groupId>org.apache.hadoop</groupId>
 			<artifactId>hadoop-core</artifactId>
 			<version>0.20.2</version>
@@ -286,6 +38,69 @@
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
+			<groupId>org.apache.hive</groupId>
+			<artifactId>hive-cli</artifactId>
+			<version>0.11.0</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.apache.hive</groupId>
+			<artifactId>hive-common</artifactId>
+			<version>0.11.0</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.apache.hive</groupId>
+			<artifactId>hive-exec</artifactId>
+			<version>0.11.0</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.apache.hive</groupId>
+			<artifactId>hive-hwi</artifactId>
+			<version>0.11.0</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.apache.hive</groupId>
+			<artifactId>hive-jdbc</artifactId>
+			<version>0.11.0</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.apache.hive</groupId>
+			<artifactId>hive-metastore</artifactId>
+			<version>0.11.0</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.apache.hive</groupId>
+			<artifactId>hive-service</artifactId>
+			<version>0.11.0</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.apache.hive</groupId>
+			<artifactId>hive-shims</artifactId>
+			<version>0.11.0</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.apache.hive</groupId>
+			<artifactId>hive-serde</artifactId>
+			<version>0.11.0</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hivesterix-translator</artifactId>
 			<version>0.2.7-SNAPSHOT</version>
diff --git a/hivesterix/hivesterix-dist/src/main/java/edu/uci/ics/hivesterix/runtime/exec/HyracksExecutionEngine.java b/hivesterix/hivesterix-dist/src/main/java/edu/uci/ics/hivesterix/runtime/exec/HyracksExecutionEngine.java
index d3bcaca..bfab157 100644
--- a/hivesterix/hivesterix-dist/src/main/java/edu/uci/ics/hivesterix/runtime/exec/HyracksExecutionEngine.java
+++ b/hivesterix/hivesterix-dist/src/main/java/edu/uci/ics/hivesterix/runtime/exec/HyracksExecutionEngine.java
@@ -36,16 +36,20 @@
 import org.apache.hadoop.hive.ql.exec.ConditionalTask;
 import org.apache.hadoop.hive.ql.exec.FileSinkOperator;
 import org.apache.hadoop.hive.ql.exec.MapRedTask;
+import org.apache.hadoop.hive.ql.exec.MoveTask;
 import org.apache.hadoop.hive.ql.exec.Operator;
 import org.apache.hadoop.hive.ql.exec.TableScanOperator;
 import org.apache.hadoop.hive.ql.exec.Task;
+import org.apache.hadoop.hive.ql.exec.Utilities;
 import org.apache.hadoop.hive.ql.plan.DynamicPartitionCtx;
 import org.apache.hadoop.hive.ql.plan.FetchWork;
 import org.apache.hadoop.hive.ql.plan.FileSinkDesc;
 import org.apache.hadoop.hive.ql.plan.MapredLocalWork;
 import org.apache.hadoop.hive.ql.plan.MapredWork;
+import org.apache.hadoop.hive.ql.plan.OperatorDesc;
 import org.apache.hadoop.hive.ql.plan.PartitionDesc;
 import org.apache.hadoop.hive.ql.plan.TableScanDesc;
+import org.apache.hadoop.mapred.Reporter;
 
 import edu.uci.ics.hivesterix.common.config.ConfUtil;
 import edu.uci.ics.hivesterix.logical.expression.HiveExpressionTypeComputer;
@@ -214,7 +218,6 @@
 
         // get all leave Ops
         getLeaves(rootOps, leaveOps);
-
         HiveAlgebricksTranslator translator = new HiveAlgebricksTranslator();
         try {
             translator.translate(rootOps, null, aliasToPath);
@@ -377,6 +380,12 @@
                 // remove map-reduce branches in condition task
                 ConditionalTask condition = (ConditionalTask) task;
                 List<Task<? extends Serializable>> branches = condition.getListTasks();
+                for (Task branch : branches) {
+                    if (branch instanceof MoveTask) {
+                        //return articulateMapReduceOperators(branch, rootOps, aliasToPath, rootTasks);
+                        return null;
+                    }
+                }
                 for (int i = branches.size() - 1; i >= 0; i--) {
                     Task branch = branches.get(i);
                     if (branch instanceof MapRedTask) {
@@ -396,7 +405,7 @@
 
         MapRedTask mrtask = (MapRedTask) task;
         MapredWork work = (MapredWork) mrtask.getWork();
-        HashMap<String, Operator<? extends Serializable>> operators = work.getAliasToWork();
+        HashMap<String, Operator<? extends OperatorDesc>> operators = work.getAliasToWork();
 
         Set entries = operators.entrySet();
         Iterator<Entry<String, Operator>> iterator = entries.iterator();
@@ -414,7 +423,7 @@
         // get map local work
         MapredLocalWork localWork = work.getMapLocalWork();
         if (localWork != null) {
-            HashMap<String, Operator<? extends Serializable>> localOperators = localWork.getAliasToWork();
+            HashMap<String, Operator<? extends OperatorDesc>> localOperators = localWork.getAliasToWork();
 
             Set localEntries = localOperators.entrySet();
             Iterator<Entry<String, Operator>> localIterator = localEntries.iterator();
@@ -479,9 +488,9 @@
                 for (Operator childMap : childMapOps) {
                     if (childMap instanceof TableScanOperator) {
                         TableScanDesc topDesc = (TableScanDesc) childMap.getConf();
-                        if (topDesc == null)
+                        if (topDesc == null || topDesc.getAlias() == null) {
                             mapChildren.add(childMap);
-                        else {
+                        } else {
                             rootOps.add(childMap);
                         }
                     } else {
@@ -501,9 +510,14 @@
                 }
                 i = 0;
                 for (Operator child : mapChildren) {
-                    if (child.getParentOperators() == null || child.getParentOperators().size() == 0)
+                    if (child.getParentOperators() == null || child.getParentOperators().size() == 0) {
                         child.setParentOperators(new ArrayList<Operator>());
-                    child.getParentOperators().add(leafs.get(i));
+                    }
+                    if (i < leafs.size()) {
+                        if (child.getParentOperators().size()==0) {
+                            child.getParentOperators().add(leafs.get(i));
+                        }
+                    }
                     i++;
                 }
             }
@@ -603,10 +617,10 @@
             String specPath = desc.getDirName();
             DynamicPartitionCtx dpCtx = desc.getDynPartCtx();
             // for 0.7.0
-            fsOp.mvFileToFinalPath(specPath, conf, true, LOG, dpCtx);
+            //fsOp.mvFileToFinalPath(specPath, conf, true, LOG, dpCtx);
             // for 0.8.0
-            // Utilities.mvFileToFinalPath(specPath, conf, true, LOG, dpCtx,
-            // desc);
+            //Utilities.mvFileToFinalPath(specPath, conf, true, LOG, dpCtx, desc);
+            Utilities.mvFileToFinalPath(specPath, conf, true, LOG, dpCtx, desc, Reporter.NULL);
         }
     }
 }
diff --git a/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/ql/Driver.java b/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/ql/Driver.java
index 4ef74e9..a7ccb5a 100644
--- a/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/ql/Driver.java
+++ b/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/ql/Driver.java
@@ -1,17 +1,3 @@
-/*
- * Copyright 2009-2013 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 /**
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
@@ -42,11 +28,13 @@
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Iterator;
+import java.util.LinkedHashMap;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Queue;
 import java.util.Set;
+import java.util.concurrent.ConcurrentLinkedQueue;
 
 import org.apache.commons.lang.StringUtils;
 import org.apache.commons.logging.Log;
@@ -62,6 +50,7 @@
 import org.apache.hadoop.hive.ql.exec.ExecDriver;
 import org.apache.hadoop.hive.ql.exec.FetchTask;
 import org.apache.hadoop.hive.ql.exec.MapRedTask;
+import org.apache.hadoop.hive.ql.exec.MoveTask;
 import org.apache.hadoop.hive.ql.exec.Operator;
 import org.apache.hadoop.hive.ql.exec.StatsTask;
 import org.apache.hadoop.hive.ql.exec.TableScanOperator;
@@ -86,23 +75,22 @@
 import org.apache.hadoop.hive.ql.lockmgr.HiveLockObject;
 import org.apache.hadoop.hive.ql.lockmgr.HiveLockObject.HiveLockObjectData;
 import org.apache.hadoop.hive.ql.lockmgr.LockException;
+import org.apache.hadoop.hive.ql.log.PerfLogger;
 import org.apache.hadoop.hive.ql.metadata.AuthorizationException;
 import org.apache.hadoop.hive.ql.metadata.DummyPartition;
 import org.apache.hadoop.hive.ql.metadata.Hive;
 import org.apache.hadoop.hive.ql.metadata.HiveException;
-import org.apache.hadoop.hive.ql.metadata.HiveUtils;
 import org.apache.hadoop.hive.ql.metadata.Partition;
 import org.apache.hadoop.hive.ql.metadata.Table;
 import org.apache.hadoop.hive.ql.optimizer.ppr.PartitionPruner;
 import org.apache.hadoop.hive.ql.parse.ASTNode;
 import org.apache.hadoop.hive.ql.parse.AbstractSemanticAnalyzerHook;
 import org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer;
-import org.apache.hadoop.hive.ql.parse.ErrorMsg;
 import org.apache.hadoop.hive.ql.parse.HiveSemanticAnalyzerHookContext;
 import org.apache.hadoop.hive.ql.parse.HiveSemanticAnalyzerHookContextImpl;
+import org.apache.hadoop.hive.ql.parse.ImportSemanticAnalyzer;
 import org.apache.hadoop.hive.ql.parse.ParseContext;
 import org.apache.hadoop.hive.ql.parse.ParseDriver;
-import org.apache.hadoop.hive.ql.parse.ParseException;
 import org.apache.hadoop.hive.ql.parse.ParseUtils;
 import org.apache.hadoop.hive.ql.parse.PrunedPartitionList;
 import org.apache.hadoop.hive.ql.parse.SemanticAnalyzer;
@@ -112,6 +100,7 @@
 import org.apache.hadoop.hive.ql.plan.ConditionalResolver;
 import org.apache.hadoop.hive.ql.plan.ConditionalResolverMergeFiles;
 import org.apache.hadoop.hive.ql.plan.HiveOperation;
+import org.apache.hadoop.hive.ql.plan.OperatorDesc;
 import org.apache.hadoop.hive.ql.plan.TableDesc;
 import org.apache.hadoop.hive.ql.processors.CommandProcessor;
 import org.apache.hadoop.hive.ql.processors.CommandProcessorResponse;
@@ -127,15 +116,18 @@
 import edu.uci.ics.hivesterix.runtime.exec.HyracksExecutionEngine;
 import edu.uci.ics.hivesterix.runtime.exec.IExecutionEngine;
 
-@SuppressWarnings({ "deprecation", "unused" })
+@SuppressWarnings({ "deprecation", "unchecked" })
 public class Driver implements CommandProcessor {
 
-    static final private Log LOG = LogFactory.getLog(Driver.class.getName());
-    static final private LogHelper console = new LogHelper(LOG);
-
     // hive-sterix
     private IExecutionEngine engine;
     private boolean hivesterix = false;
+    private Set<Task> executedConditionalTsks = new HashSet<Task>();
+
+    static final private Log LOG = LogFactory.getLog(Driver.class.getName());
+    static final private LogHelper console = new LogHelper(LOG);
+
+    private static final Object compileMonitor = new Object();
 
     private int maxRows = 100;
     ByteStream.Output bos = new ByteStream.Output();
@@ -152,23 +144,57 @@
 
     // A limit on the number of threads that can be launched
     private int maxthreads;
-    private final int sleeptime = 2000;
-
+    private static final int SLEEP_TIME = 2000;
     protected int tryCount = Integer.MAX_VALUE;
 
-    private int checkLockManager() {
+    /**
+     * for backwards compatibility with current tests
+     */
+    public Driver(HiveConf conf) {
+        this.conf = conf;
+
+    }
+
+    public Driver() {
+        if (SessionState.get() != null) {
+            conf = SessionState.get().getConf();
+        }
+
+        // hivesterix
+        engine = new HyracksExecutionEngine(conf);
+    }
+
+    // hivesterix: plan printer
+    public Driver(HiveConf conf, PrintWriter planPrinter) {
+        this.conf = conf;
+        engine = new HyracksExecutionEngine(conf, planPrinter);
+    }
+
+    public void clear() {
+        this.hivesterix = false;
+        this.executedConditionalTsks.clear();
+    }
+
+    private boolean checkLockManager() {
         boolean supportConcurrency = conf.getBoolVar(HiveConf.ConfVars.HIVE_SUPPORT_CONCURRENCY);
-        if (supportConcurrency && (hiveLockMgr == null)) {
+        if (!supportConcurrency) {
+            return false;
+        }
+        if ((hiveLockMgr == null)) {
             try {
                 setLockManager();
             } catch (SemanticException e) {
                 errorMessage = "FAILED: Error in semantic analysis: " + e.getMessage();
                 SQLState = ErrorMsg.findSQLState(e.getMessage());
                 console.printError(errorMessage, "\n" + org.apache.hadoop.util.StringUtils.stringifyException(e));
-                return (12);
+                return false;
             }
         }
-        return (0);
+        // the reason that we set the lock manager for the cxt here is because each
+        // query has its own ctx object. The hiveLockMgr is shared accross the
+        // same instance of Driver, which can run multiple queries.
+        ctx.setHiveLockMgr(hiveLockMgr);
+        return hiveLockMgr != null;
     }
 
     private void setLockManager() throws SemanticException {
@@ -183,6 +209,16 @@
                 hiveLockMgr = (HiveLockManager) ReflectionUtils.newInstance(conf.getClassByName(lockMgr), conf);
                 hiveLockMgr.setContext(new HiveLockManagerCtx(conf));
             } catch (Exception e) {
+                // set hiveLockMgr to null just in case this invalid manager got set to
+                // next query's ctx.
+                if (hiveLockMgr != null) {
+                    try {
+                        hiveLockMgr.close();
+                    } catch (LockException e1) {
+                        //nothing can do here
+                    }
+                    hiveLockMgr = null;
+                }
                 throw new SemanticException(ErrorMsg.LOCKMGR_NOT_INITIALIZED.getMsg() + e.getMessage());
             }
         }
@@ -230,10 +266,8 @@
         } else if (sem.getFetchTask() != null) {
             FetchTask ft = sem.getFetchTask();
             TableDesc td = ft.getTblDesc();
-            // partitioned tables don't have tableDesc set on the FetchTask.
-            // Instead
-            // they have a list of PartitionDesc objects, each with a table
-            // desc.
+            // partitioned tables don't have tableDesc set on the FetchTask. Instead
+            // they have a list of PartitionDesc objects, each with a table desc.
             // Let's
             // try to fetch the desc for the first partition and use it's
             // deserializer.
@@ -320,59 +354,102 @@
     }
 
     /**
-     * for backwards compatibility with current tests
-     */
-    public Driver(HiveConf conf) {
-        this.conf = conf;
-
-        // hivesterix
-        engine = new HyracksExecutionEngine(conf);
-    }
-
-    public Driver() {
-        if (SessionState.get() != null) {
-            conf = SessionState.get().getConf();
-        }
-
-        // hivesterix
-        engine = new HyracksExecutionEngine(conf);
-    }
-
-    // hivesterix: plan printer
-    public Driver(HiveConf conf, PrintWriter planPrinter) {
-        this.conf = conf;
-        engine = new HyracksExecutionEngine(conf, planPrinter);
-    }
-
-    public void clear() {
-        this.hivesterix = false;
-    }
-
-    /**
-     * Compile a new query. Any currently-planned query associated with this
-     * Driver is discarded.
+     * Compile a new query. Any currently-planned query associated with this Driver is discarded.
      * 
      * @param command
      *            The SQL query to compile.
      */
     public int compile(String command) {
+        return compile(command, true);
+    }
+
+    /**
+     * Hold state variables specific to each query being executed, that may not
+     * be consistent in the overall SessionState
+     */
+    private static class QueryState {
+        private HiveOperation op;
+        private String cmd;
+        private boolean init = false;
+
+        /**
+         * Initialize the queryState with the query state variables
+         */
+        public void init(HiveOperation op, String cmd) {
+            this.op = op;
+            this.cmd = cmd;
+            this.init = true;
+        }
+
+        public boolean isInitialized() {
+            return this.init;
+        }
+
+        public HiveOperation getOp() {
+            return this.op;
+        }
+
+        public String getCmd() {
+            return this.cmd;
+        }
+    }
+
+    public void saveSession(QueryState qs) {
+        SessionState oldss = SessionState.get();
+        if (oldss != null && oldss.getHiveOperation() != null) {
+            qs.init(oldss.getHiveOperation(), oldss.getCmd());
+        }
+    }
+
+    public void restoreSession(QueryState qs) {
+        SessionState ss = SessionState.get();
+        if (ss != null && qs != null && qs.isInitialized()) {
+            ss.setCmd(qs.getCmd());
+            ss.setCommandType(qs.getOp());
+        }
+    }
+
+    /**
+     * Compile a new query, but potentially reset taskID counter. Not resetting task counter
+     * is useful for generating re-entrant QL queries.
+     * 
+     * @param command
+     *            The HiveQL query to compile
+     * @param resetTaskIds
+     *            Resets taskID counter if true.
+     * @return 0 for ok
+     */
+    public int compile(String command, boolean resetTaskIds) {
+        PerfLogger perfLogger = PerfLogger.getPerfLogger();
+        perfLogger.PerfLogBegin(LOG, PerfLogger.COMPILE);
+
+        //holder for parent command type/string when executing reentrant queries
+        QueryState queryState = new QueryState();
+
         if (plan != null) {
             close();
             plan = null;
         }
 
-        TaskFactory.resetId();
+        if (resetTaskIds) {
+            TaskFactory.resetId();
+        }
+        saveSession(queryState);
 
         try {
             command = new VariableSubstitution().substitute(conf, command);
             ctx = new Context(conf);
+            ctx.setTryCount(getTryCount());
+            ctx.setCmd(command);
+            ctx.setHDFSCleanup(true);
 
             ParseDriver pd = new ParseDriver();
             ASTNode tree = pd.parse(command, ctx);
             tree = ParseUtils.findRootNonNullToken(tree);
 
             BaseSemanticAnalyzer sem = SemanticAnalyzerFactory.get(conf, tree);
-            List<AbstractSemanticAnalyzerHook> saHooks = getSemanticAnalyzerHooks();
+            List<AbstractSemanticAnalyzerHook> saHooks = getHooks(HiveConf.ConfVars.SEMANTIC_ANALYZER_HOOK,
+                    AbstractSemanticAnalyzerHook.class);
 
             // Do semantic analysis and plan generation
             if (saHooks != null) {
@@ -382,6 +459,7 @@
                     tree = hook.preAnalyze(hookCtx, tree);
                 }
                 sem.analyze(tree, ctx);
+                hookCtx.update(sem);
                 for (AbstractSemanticAnalyzerHook hook : saHooks) {
                     hook.postAnalyze(hookCtx, sem.getRootTasks());
                 }
@@ -394,19 +472,10 @@
             // validate the plan
             sem.validate();
 
-            plan = new QueryPlan(command, sem);
-            // initialize FetchTask right here
-            if (plan.getFetchTask() != null) {
-                plan.getFetchTask().initialize(conf, plan, null);
-            }
-
-            // get the output schema
-            schema = getSchema(sem, conf);
+            plan = new QueryPlan(command, sem, perfLogger.getStartTime(PerfLogger.DRIVER_RUN));
 
             // test Only - serialize the query plan and deserialize it
-            if (sem instanceof SemanticAnalyzer && command.toLowerCase().indexOf("create") < 0) {
-
-                Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader());
+            if ("true".equalsIgnoreCase(System.getProperty("test.serialize.qplan"))) {
 
                 String queryPlanFileName = ctx.getLocalScratchDir(true) + Path.SEPARATOR_CHAR + "queryplan.xml";
                 LOG.info("query plan = " + queryPlanFileName);
@@ -431,17 +500,24 @@
                 plan.getFetchTask().initialize(conf, plan, null);
             }
 
-            // do the authorization check
+            // get the output schema
+            schema = getSchema(sem, conf);
+
+            //do the authorization check
             if (HiveConf.getBoolVar(conf, HiveConf.ConfVars.HIVE_AUTHORIZATION_ENABLED)) {
                 try {
-                    // doAuthorization(sem);
+                    perfLogger.PerfLogBegin(LOG, PerfLogger.DO_AUTHORIZATION);
+                    doAuthorization(sem);
                 } catch (AuthorizationException authExp) {
                     console.printError("Authorization failed:" + authExp.getMessage()
                             + ". Use show grant to get more details.");
                     return 403;
+                } finally {
+                    perfLogger.PerfLogEnd(LOG, PerfLogger.DO_AUTHORIZATION);
                 }
             }
 
+            //restore state after we're done executing a specific query
             // hyracks run
             if (sem instanceof SemanticAnalyzer && command.toLowerCase().indexOf("create") < 0) {
                 int engineRet = engine.compileJob(sem.getRootTasks());
@@ -450,21 +526,19 @@
                 }
             }
             return 0;
-        } catch (SemanticException e) {
-            errorMessage = "FAILED: Error in semantic analysis: " + e.getMessage();
-            SQLState = ErrorMsg.findSQLState(e.getMessage());
-            console.printError(errorMessage, "\n" + org.apache.hadoop.util.StringUtils.stringifyException(e));
-            return (10);
-        } catch (ParseException e) {
-            errorMessage = "FAILED: Parse Error: " + e.getMessage();
-            SQLState = ErrorMsg.findSQLState(e.getMessage());
-            console.printError(errorMessage, "\n" + org.apache.hadoop.util.StringUtils.stringifyException(e));
-            return (11);
         } catch (Exception e) {
-            errorMessage = "FAILED: Hive Internal Error: " + Utilities.getNameMessage(e);
-            SQLState = ErrorMsg.findSQLState(e.getMessage());
-            console.printError(errorMessage + "\n" + org.apache.hadoop.util.StringUtils.stringifyException(e));
-            return (12);
+            ErrorMsg error = ErrorMsg.getErrorMsg(e.getMessage());
+            errorMessage = "FAILED: " + e.getClass().getSimpleName();
+            if (error != ErrorMsg.GENERIC_ERROR) {
+                errorMessage += " [Error " + error.getErrorCode() + "]:";
+            }
+            errorMessage += " " + e.getMessage();
+            SQLState = error.getSQLState();
+            console.printError(errorMessage, "\n" + org.apache.hadoop.util.StringUtils.stringifyException(e));
+            return error.getErrorCode();
+        } finally {
+            perfLogger.PerfLogEnd(LOG, PerfLogger.COMPILE);
+            restoreSession(queryState);
         }
     }
 
@@ -479,13 +553,13 @@
                 ss.getAuthorizer().authorize(db.getDatabase(db.getCurrentDatabase()), null,
                         HiveOperation.CREATETABLE_AS_SELECT.getOutputRequiredPrivileges());
             } else {
-                // if (op.equals(HiveOperation.IMPORT)) {
-                // ImportSemanticAnalyzer isa = (ImportSemanticAnalyzer) sem;
-                // if (!isa.existsTable()) {
-                ss.getAuthorizer().authorize(db.getDatabase(db.getCurrentDatabase()), null,
-                        HiveOperation.CREATETABLE_AS_SELECT.getOutputRequiredPrivileges());
-                // }
-                // }
+                if (op.equals(HiveOperation.IMPORT)) {
+                    ImportSemanticAnalyzer isa = (ImportSemanticAnalyzer) sem;
+                    if (!isa.existsTable()) {
+                        ss.getAuthorizer().authorize(db.getDatabase(db.getCurrentDatabase()), null,
+                                HiveOperation.CREATETABLE_AS_SELECT.getOutputRequiredPrivileges());
+                    }
+                }
             }
             if (outputs != null && outputs.size() > 0) {
                 for (WriteEntity write : outputs) {
@@ -513,8 +587,8 @@
 
             Map<String, Boolean> tableUsePartLevelAuth = new HashMap<String, Boolean>();
             for (ReadEntity read : inputs) {
-                if (read.getPartition() != null) {
-                    Table tbl = read.getTable();
+                Table tbl = read.getTable();
+                if ((read.getPartition() != null) || (tbl.isPartitioned())) {
                     String tblName = tbl.getTableName();
                     if (tableUsePartLevelAuth.get(tblName) == null) {
                         boolean usePartLevelPriv = (tbl.getParameters().get("PARTITION_LEVEL_PRIVILEGE") != null && ("TRUE"
@@ -533,9 +607,9 @@
                 ParseContext parseCtx = querySem.getParseContext();
                 Map<TableScanOperator, Table> tsoTopMap = parseCtx.getTopToTable();
 
-                for (Map.Entry<String, Operator<? extends Serializable>> topOpMap : querySem.getParseContext()
+                for (Map.Entry<String, Operator<? extends OperatorDesc>> topOpMap : querySem.getParseContext()
                         .getTopOps().entrySet()) {
-                    Operator<? extends Serializable> topOp = topOpMap.getValue();
+                    Operator<? extends OperatorDesc> topOp = topOpMap.getValue();
                     if (topOp instanceof TableScanOperator && tsoTopMap.containsKey(topOp)) {
                         TableScanOperator tableScanOp = (TableScanOperator) topOp;
                         Table tbl = tsoTopMap.get(tableScanOp);
@@ -551,7 +625,10 @@
                                 cols.add(columns.get(i).getName());
                             }
                         }
-                        if (tbl.isPartitioned() && tableUsePartLevelAuth.get(tbl.getTableName())) {
+                        //map may not contain all sources, since input list may have been optimized out
+                        //or non-existent tho such sources may still be referenced by the TableScanOperator
+                        //if it's null then the partition probably doesn't exist so let's use table permission
+                        if (tbl.isPartitioned() && tableUsePartLevelAuth.get(tbl.getTableName()) == Boolean.TRUE) {
                             String alias_id = topOpMap.getKey();
                             PrunedPartitionList partsList = PartitionPruner.prune(parseCtx.getTopToTable().get(topOp),
                                     parseCtx.getOpToPartPruner().get(topOp), parseCtx.getConf(), alias_id,
@@ -582,30 +659,28 @@
             // cache the results for table authorization
             Set<String> tableAuthChecked = new HashSet<String>();
             for (ReadEntity read : inputs) {
-                Table tbl = null;
+                Table tbl = read.getTable();
                 if (read.getPartition() != null) {
-                    tbl = read.getPartition().getTable();
+                    Partition partition = read.getPartition();
+                    tbl = partition.getTable();
                     // use partition level authorization
-                    if (tableUsePartLevelAuth.get(tbl.getTableName())) {
-                        List<String> cols = part2Cols.get(read.getPartition());
+                    if (tableUsePartLevelAuth.get(tbl.getTableName()) == Boolean.TRUE) {
+                        List<String> cols = part2Cols.get(partition);
                         if (cols != null && cols.size() > 0) {
-                            ss.getAuthorizer().authorize(read.getPartition().getTable(), read.getPartition(), cols,
+                            ss.getAuthorizer().authorize(partition.getTable(), partition, cols,
                                     op.getInputRequiredPrivileges(), null);
                         } else {
-                            ss.getAuthorizer().authorize(read.getPartition(), op.getInputRequiredPrivileges(), null);
+                            ss.getAuthorizer().authorize(partition, op.getInputRequiredPrivileges(), null);
                         }
                         continue;
                     }
-                } else if (read.getTable() != null) {
-                    tbl = read.getTable();
                 }
 
-                // if we reach here, it means it needs to do a table
-                // authorization
-                // check, and the table authorization may already happened
-                // because of other
+                // if we reach here, it means it needs to do a table authorization
+                // check, and the table authorization may already happened because of other
                 // partitions
-                if (tbl != null && !tableAuthChecked.contains(tbl.getTableName())) {
+                if (tbl != null && !tableAuthChecked.contains(tbl.getTableName())
+                        && !(tableUsePartLevelAuth.get(tbl.getTableName()) == Boolean.TRUE)) {
                     List<String> cols = tab2Cols.get(tbl);
                     if (cols != null && cols.size() > 0) {
                         ss.getAuthorizer().authorize(tbl, null, cols, op.getInputRequiredPrivileges(), null);
@@ -632,16 +707,15 @@
      * @param p
      *            The partition to be locked
      * @param mode
-     *            The mode of the lock (SHARED/EXCLUSIVE) Get the list of
-     *            objects to be locked. If a partition needs to be locked (in
-     *            any mode), all its parents should also be locked in SHARED
-     *            mode.
+     *            The mode of the lock (SHARED/EXCLUSIVE) Get the list of objects to be locked. If a
+     *            partition needs to be locked (in any mode), all its parents should also be locked in
+     *            SHARED mode.
      **/
     private List<HiveLockObj> getLockObjects(Table t, Partition p, HiveLockMode mode) throws SemanticException {
         List<HiveLockObj> locks = new LinkedList<HiveLockObj>();
 
         HiveLockObjectData lockData = new HiveLockObjectData(plan.getQueryId(), String.valueOf(System
-                .currentTimeMillis()), "IMPLICIT");
+                .currentTimeMillis()), "IMPLICIT", plan.getQueryStr());
 
         if (t != null) {
             locks.add(new HiveLockObj(new HiveLockObject(t, lockData), mode));
@@ -665,16 +739,20 @@
                 name = p.getName().split("@")[2];
             }
 
-            String partName = name;
             String partialName = "";
             String[] partns = name.split("/");
             int len = p instanceof DummyPartition ? partns.length : partns.length - 1;
+            Map<String, String> partialSpec = new LinkedHashMap<String, String>();
             for (int idx = 0; idx < len; idx++) {
                 String partn = partns[idx];
                 partialName += partn;
+                String[] nameValue = partn.split("=");
+                assert (nameValue.length == 2);
+                partialSpec.put(nameValue[0], nameValue[1]);
                 try {
                     locks.add(new HiveLockObj(new HiveLockObject(new DummyPartition(p.getTable(), p.getTable()
-                            .getDbName() + "/" + p.getTable().getTableName() + "/" + partialName), lockData), mode));
+                            .getDbName() + "/" + p.getTable().getTableName() + "/" + partialName, partialSpec),
+                            lockData), mode));
                     partialName += "/";
                 } catch (HiveException e) {
                     throw new SemanticException(e.getMessage());
@@ -688,17 +766,16 @@
     }
 
     /**
-     * Acquire read and write locks needed by the statement. The list of objects
-     * to be locked are obtained from he inputs and outputs populated by the
-     * compiler. The lock acuisition scheme is pretty simple. If all the locks
-     * cannot be obtained, error out. Deadlock is avoided by making sure that
-     * the locks are lexicographically sorted.
+     * Acquire read and write locks needed by the statement. The list of objects to be locked are
+     * obtained from he inputs and outputs populated by the compiler. The lock acuisition scheme is
+     * pretty simple. If all the locks cannot be obtained, error out. Deadlock is avoided by making
+     * sure that the locks are lexicographically sorted.
      **/
     public int acquireReadWriteLocks() {
-        try {
-            int sleepTime = conf.getIntVar(HiveConf.ConfVars.HIVE_LOCK_SLEEP_BETWEEN_RETRIES) * 1000;
-            int numRetries = conf.getIntVar(HiveConf.ConfVars.HIVE_LOCK_NUMRETRIES);
+        PerfLogger perfLogger = PerfLogger.getPerfLogger();
+        perfLogger.PerfLogBegin(LOG, PerfLogger.ACQUIRE_READ_WRITE_LOCKS);
 
+        try {
             boolean supportConcurrency = conf.getBoolVar(HiveConf.ConfVars.HIVE_SUPPORT_CONCURRENCY);
             if (!supportConcurrency) {
                 return 0;
@@ -707,8 +784,7 @@
             List<HiveLockObj> lockObjects = new ArrayList<HiveLockObj>();
 
             // Sort all the inputs, outputs.
-            // If a lock needs to be acquired on any partition, a read lock
-            // needs to be acquired on all
+            // If a lock needs to be acquired on any partition, a read lock needs to be acquired on all
             // its parents also
             for (ReadEntity input : plan.getInputs()) {
                 if (input.getType() == ReadEntity.Type.TABLE) {
@@ -719,16 +795,21 @@
             }
 
             for (WriteEntity output : plan.getOutputs()) {
+                List<HiveLockObj> lockObj = null;
                 if (output.getTyp() == WriteEntity.Type.TABLE) {
-                    lockObjects.addAll(getLockObjects(output.getTable(), null,
-                            output.isComplete() ? HiveLockMode.EXCLUSIVE : HiveLockMode.SHARED));
+                    lockObj = getLockObjects(output.getTable(), null, output.isComplete() ? HiveLockMode.EXCLUSIVE
+                            : HiveLockMode.SHARED);
                 } else if (output.getTyp() == WriteEntity.Type.PARTITION) {
-                    lockObjects.addAll(getLockObjects(null, output.getPartition(), HiveLockMode.EXCLUSIVE));
+                    lockObj = getLockObjects(null, output.getPartition(), HiveLockMode.EXCLUSIVE);
                 }
-                // In case of dynamic queries, it is possible to have incomplete
-                // dummy partitions
+                // In case of dynamic queries, it is possible to have incomplete dummy partitions
                 else if (output.getTyp() == WriteEntity.Type.DUMMYPARTITION) {
-                    lockObjects.addAll(getLockObjects(null, output.getPartition(), HiveLockMode.SHARED));
+                    lockObj = getLockObjects(null, output.getPartition(), HiveLockMode.SHARED);
+                }
+
+                if (lockObj != null) {
+                    lockObjects.addAll(lockObj);
+                    ctx.getOutputLockObjects().put(output, lockObj);
                 }
             }
 
@@ -736,13 +817,8 @@
                 return 0;
             }
 
-            int ret = checkLockManager();
-            if (ret != 0) {
-                return ret;
-            }
-
             HiveLockObjectData lockData = new HiveLockObjectData(plan.getQueryId(), String.valueOf(System
-                    .currentTimeMillis()), "IMPLICIT");
+                    .currentTimeMillis()), "IMPLICIT", plan.getQueryStr());
 
             // Lock the database also
             try {
@@ -753,25 +829,7 @@
                 throw new SemanticException(e.getMessage());
             }
 
-            ctx.setHiveLockMgr(hiveLockMgr);
-            List<HiveLock> hiveLocks = null;
-
-            int tryNum = 1;
-            do {
-
-                // ctx.getHiveLockMgr();
-                // hiveLocks = ctx.getHiveLockMgr().lock(lockObjects, false);
-
-                if (hiveLocks != null) {
-                    break;
-                }
-
-                tryNum++;
-                try {
-                    Thread.sleep(sleepTime);
-                } catch (InterruptedException e) {
-                }
-            } while (tryNum < numRetries);
+            List<HiveLock> hiveLocks = ctx.getHiveLockMgr().lock(lockObjects, false);
 
             if (hiveLocks == null) {
                 throw new SemanticException(ErrorMsg.LOCK_CANNOT_BE_ACQUIRED.getMsg());
@@ -785,138 +843,207 @@
             SQLState = ErrorMsg.findSQLState(e.getMessage());
             console.printError(errorMessage, "\n" + org.apache.hadoop.util.StringUtils.stringifyException(e));
             return (10);
-        } catch (Exception e) {
+        } catch (LockException e) {
             errorMessage = "FAILED: Error in acquiring locks: " + e.getMessage();
             SQLState = ErrorMsg.findSQLState(e.getMessage());
             console.printError(errorMessage, "\n" + org.apache.hadoop.util.StringUtils.stringifyException(e));
             return (10);
-        }
-    }
-
-    /**
-     * Release all the locks acquired implicitly by the statement. Note that the
-     * locks acquired with 'keepAlive' set to True are not released.
-     **/
-    private void releaseLocks() {
-        if (ctx != null && ctx.getHiveLockMgr() != null) {
-            try {
-                ctx.getHiveLockMgr().close();
-                ctx.setHiveLocks(null);
-            } catch (LockException e) {
-            }
+        } finally {
+            perfLogger.PerfLogEnd(LOG, PerfLogger.ACQUIRE_READ_WRITE_LOCKS);
         }
     }
 
     /**
      * @param hiveLocks
-     *            list of hive locks to be released Release all the locks
-     *            specified. If some of the locks have already been released,
-     *            ignore them
+     *            list of hive locks to be released Release all the locks specified. If some of the
+     *            locks have already been released, ignore them
      **/
     private void releaseLocks(List<HiveLock> hiveLocks) {
+        PerfLogger perfLogger = PerfLogger.getPerfLogger();
+        perfLogger.PerfLogBegin(LOG, PerfLogger.RELEASE_LOCKS);
+
         if (hiveLocks != null) {
             ctx.getHiveLockMgr().releaseLocks(hiveLocks);
         }
         ctx.setHiveLocks(null);
+
+        perfLogger.PerfLogEnd(LOG, PerfLogger.RELEASE_LOCKS);
     }
 
-    public CommandProcessorResponse run(String command) {
+    public CommandProcessorResponse run(String command) throws CommandNeedRetryException {
         errorMessage = null;
         SQLState = null;
 
-        int ret = compile(command);
+        if (!validateConfVariables()) {
+            return new CommandProcessorResponse(12, errorMessage, SQLState);
+        }
+
+        HiveDriverRunHookContext hookContext = new HiveDriverRunHookContextImpl(conf, command);
+        // Get all the driver run hooks and pre-execute them.
+        List<HiveDriverRunHook> driverRunHooks;
+        try {
+            driverRunHooks = getHooks(HiveConf.ConfVars.HIVE_DRIVER_RUN_HOOKS, HiveDriverRunHook.class);
+            for (HiveDriverRunHook driverRunHook : driverRunHooks) {
+                driverRunHook.preDriverRun(hookContext);
+            }
+        } catch (Exception e) {
+            errorMessage = "FAILED: Hive Internal Error: " + Utilities.getNameMessage(e);
+            SQLState = ErrorMsg.findSQLState(e.getMessage());
+            console.printError(errorMessage + "\n" + org.apache.hadoop.util.StringUtils.stringifyException(e));
+            return new CommandProcessorResponse(12, errorMessage, SQLState);
+        }
+
+        // Reset the perf logger
+        PerfLogger perfLogger = PerfLogger.getPerfLogger(true);
+        perfLogger.PerfLogBegin(LOG, PerfLogger.DRIVER_RUN);
+        perfLogger.PerfLogBegin(LOG, PerfLogger.TIME_TO_SUBMIT);
+
+        int ret;
+        synchronized (compileMonitor) {
+            ret = compile(command);
+        }
         if (ret != 0) {
-            // releaseLocks(ctx.getHiveLocks());
+            releaseLocks(ctx.getHiveLocks());
             return new CommandProcessorResponse(ret, errorMessage, SQLState);
         }
 
-        // ret = acquireReadWriteLocks();
-        if (ret != 0) {
-            // releaseLocks(ctx.getHiveLocks());
-            return new CommandProcessorResponse(ret, errorMessage, SQLState);
+        boolean requireLock = false;
+        boolean ckLock = checkLockManager();
+
+        if (ckLock) {
+            boolean lockOnlyMapred = HiveConf.getBoolVar(conf, HiveConf.ConfVars.HIVE_LOCK_MAPRED_ONLY);
+            if (lockOnlyMapred) {
+                Queue<Task<? extends Serializable>> taskQueue = new LinkedList<Task<? extends Serializable>>();
+                taskQueue.addAll(plan.getRootTasks());
+                while (taskQueue.peek() != null) {
+                    Task<? extends Serializable> tsk = taskQueue.remove();
+                    requireLock = requireLock || tsk.requireLock();
+                    if (requireLock) {
+                        break;
+                    }
+                    if (tsk instanceof ConditionalTask) {
+                        taskQueue.addAll(((ConditionalTask) tsk).getListTasks());
+                    }
+                    if (tsk.getChildTasks() != null) {
+                        taskQueue.addAll(tsk.getChildTasks());
+                    }
+                    // does not add back up task here, because back up task should be the same
+                    // type of the original task.
+                }
+            } else {
+                requireLock = true;
+            }
+        }
+
+        if (requireLock) {
+            ret = acquireReadWriteLocks();
+            if (ret != 0) {
+                releaseLocks(ctx.getHiveLocks());
+                return new CommandProcessorResponse(ret, errorMessage, SQLState);
+            }
         }
 
         ret = execute();
         if (ret != 0) {
-            // releaseLocks(ctx.getHiveLocks());
+            //if needRequireLock is false, the release here will do nothing because there is no lock
+            releaseLocks(ctx.getHiveLocks());
             return new CommandProcessorResponse(ret, errorMessage, SQLState);
         }
 
-        // releaseLocks(ctx.getHiveLocks());
+        //if needRequireLock is false, the release here will do nothing because there is no lock
+        releaseLocks(ctx.getHiveLocks());
+
+        perfLogger.PerfLogEnd(LOG, PerfLogger.DRIVER_RUN);
+        perfLogger.close(LOG, plan);
+
+        // Take all the driver run hooks and post-execute them.
+        try {
+            for (HiveDriverRunHook driverRunHook : driverRunHooks) {
+                driverRunHook.postDriverRun(hookContext);
+            }
+        } catch (Exception e) {
+            errorMessage = "FAILED: Hive Internal Error: " + Utilities.getNameMessage(e);
+            SQLState = ErrorMsg.findSQLState(e.getMessage());
+            console.printError(errorMessage + "\n" + org.apache.hadoop.util.StringUtils.stringifyException(e));
+            return new CommandProcessorResponse(12, errorMessage, SQLState);
+        }
+
         return new CommandProcessorResponse(ret);
     }
 
-    private List<AbstractSemanticAnalyzerHook> getSemanticAnalyzerHooks() throws Exception {
-        ArrayList<AbstractSemanticAnalyzerHook> saHooks = new ArrayList<AbstractSemanticAnalyzerHook>();
-        String pestr = conf.getVar(HiveConf.ConfVars.SEMANTIC_ANALYZER_HOOK);
-        if (pestr == null) {
-            return saHooks;
+    /**
+     * Validate configuration variables.
+     * 
+     * @return
+     */
+    private boolean validateConfVariables() {
+        boolean valid = true;
+        if ((!conf.getBoolVar(HiveConf.ConfVars.HIVE_HADOOP_SUPPORTS_SUBDIRECTORIES))
+                && ((conf.getBoolVar(HiveConf.ConfVars.HADOOPMAPREDINPUTDIRRECURSIVE))
+                        || (conf.getBoolVar(HiveConf.ConfVars.HIVEOPTLISTBUCKETING)) || ((conf
+                            .getBoolVar(HiveConf.ConfVars.HIVE_OPTIMIZE_UNION_REMOVE))))) {
+            errorMessage = "FAILED: Hive Internal Error: " + ErrorMsg.SUPPORT_DIR_MUST_TRUE_FOR_LIST_BUCKETING.getMsg();
+            SQLState = ErrorMsg.findSQLState(errorMessage);
+            console.printError(errorMessage + "\n");
+            valid = false;
         }
-        pestr = pestr.trim();
-        if (pestr.equals("")) {
-            return saHooks;
-        }
-
-        String[] peClasses = pestr.split(",");
-
-        for (String peClass : peClasses) {
-            try {
-                AbstractSemanticAnalyzerHook hook = HiveUtils.getSemanticAnalyzerHook(conf, peClass);
-                saHooks.add(hook);
-            } catch (HiveException e) {
-                console.printError("Pre Exec Hook Class not found:" + e.getMessage());
-                throw e;
-            }
-        }
-
-        return saHooks;
+        return valid;
     }
 
-    private List<Hook> getPreExecHooks() throws Exception {
-        ArrayList<Hook> pehooks = new ArrayList<Hook>();
-        String pestr = conf.getVar(HiveConf.ConfVars.PREEXECHOOKS);
-        pestr = pestr.trim();
-        if (pestr.equals("")) {
-            return pehooks;
+    /**
+     * Returns a set of hooks specified in a configuration variable.
+     * See getHooks(HiveConf.ConfVars hookConfVar, Class<T> clazz)
+     * 
+     * @param hookConfVar
+     * @return
+     * @throws Exception
+     */
+    private List<Hook> getHooks(HiveConf.ConfVars hookConfVar) throws Exception {
+        return getHooks(hookConfVar, Hook.class);
+    }
+
+    /**
+     * Returns the hooks specified in a configuration variable. The hooks are returned in a list in
+     * the order they were specified in the configuration variable.
+     * 
+     * @param hookConfVar
+     *            The configuration variable specifying a comma separated list of the hook
+     *            class names.
+     * @param clazz
+     *            The super type of the hooks.
+     * @return A list of the hooks cast as the type specified in clazz, in the order
+     *         they are listed in the value of hookConfVar
+     * @throws Exception
+     */
+    private <T extends Hook> List<T> getHooks(HiveConf.ConfVars hookConfVar, Class<T> clazz) throws Exception {
+
+        List<T> hooks = new ArrayList<T>();
+        String csHooks = conf.getVar(hookConfVar);
+        if (csHooks == null) {
+            return hooks;
         }
 
-        String[] peClasses = pestr.split(",");
+        csHooks = csHooks.trim();
+        if (csHooks.equals("")) {
+            return hooks;
+        }
 
-        for (String peClass : peClasses) {
+        String[] hookClasses = csHooks.split(",");
+
+        for (String hookClass : hookClasses) {
             try {
-                pehooks.add((Hook) Class.forName(peClass.trim(), true, JavaUtils.getClassLoader()).newInstance());
+                T hook = (T) Class.forName(hookClass.trim(), true, JavaUtils.getClassLoader()).newInstance();
+                hooks.add(hook);
             } catch (ClassNotFoundException e) {
-                console.printError("Pre Exec Hook Class not found:" + e.getMessage());
+                console.printError(hookConfVar.varname + " Class not found:" + e.getMessage());
                 throw e;
             }
         }
 
-        return pehooks;
+        return hooks;
     }
 
-    private List<Hook> getPostExecHooks() throws Exception {
-        ArrayList<Hook> pehooks = new ArrayList<Hook>();
-        String pestr = conf.getVar(HiveConf.ConfVars.POSTEXECHOOKS);
-        pestr = pestr.trim();
-        if (pestr.equals("")) {
-            return pehooks;
-        }
-
-        String[] peClasses = pestr.split(",");
-
-        for (String peClass : peClasses) {
-            try {
-                pehooks.add((Hook) Class.forName(peClass.trim(), true, JavaUtils.getClassLoader()).newInstance());
-            } catch (ClassNotFoundException e) {
-                console.printError("Post Exec Hook Class not found:" + e.getMessage());
-                throw e;
-            }
-        }
-
-        return pehooks;
-    }
-
-    public int execute() {
+    public int execute() throws CommandNeedRetryException {
         // execute hivesterix plan
         if (hivesterix) {
             hivesterix = false;
@@ -925,6 +1052,9 @@
                 return ret;
         }
 
+        PerfLogger perfLogger = PerfLogger.getPerfLogger();
+        perfLogger.PerfLogBegin(LOG, PerfLogger.DRIVER_EXECUTE);
+
         boolean noName = StringUtils.isEmpty(conf.getVar(HiveConf.ConfVars.HADOOPJOBNAME));
         int maxlen = conf.getIntVar(HiveConf.ConfVars.HIVEJOBNAMELENGTH);
 
@@ -933,6 +1063,10 @@
 
         conf.setVar(HiveConf.ConfVars.HIVEQUERYID, queryId);
         conf.setVar(HiveConf.ConfVars.HIVEQUERYSTRING, queryStr);
+
+        conf.set("mapreduce.workflow.id", "hive_" + queryId);
+        conf.set("mapreduce.workflow.name", queryStr);
+
         maxthreads = HiveConf.getIntVar(conf, HiveConf.ConfVars.EXECPARALLETHREADNUMBER);
 
         try {
@@ -946,14 +1080,23 @@
             }
             resStream = null;
 
-            HookContext hookContext = new HookContext(plan, conf);
+            HookContext hookContext = new HookContext(plan, conf, ctx.getPathToCS());
+            hookContext.setHookType(HookContext.HookType.PRE_EXEC_HOOK);
 
-            for (Hook peh : getPreExecHooks()) {
+            for (Hook peh : getHooks(HiveConf.ConfVars.PREEXECHOOKS)) {
                 if (peh instanceof ExecuteWithHookContext) {
+                    perfLogger.PerfLogBegin(LOG, PerfLogger.PRE_HOOK + peh.getClass().getName());
+
                     ((ExecuteWithHookContext) peh).run(hookContext);
+
+                    perfLogger.PerfLogEnd(LOG, PerfLogger.PRE_HOOK + peh.getClass().getName());
                 } else if (peh instanceof PreExecute) {
+                    perfLogger.PerfLogBegin(LOG, PerfLogger.PRE_HOOK + peh.getClass().getName());
+
                     ((PreExecute) peh).run(SessionState.get(), plan.getInputs(), plan.getOutputs(), ShimLoader
                             .getHadoopShims().getUGIForConf(conf));
+
+                    perfLogger.PerfLogEnd(LOG, PerfLogger.PRE_HOOK + peh.getClass().getName());
                 }
             }
 
@@ -968,32 +1111,36 @@
             }
             String jobname = Utilities.abbreviate(queryStr, maxlen - 6);
 
-            // A runtime that launches runnable tasks as separate Threads
-            // through
+            // A runtime that launches runnable tasks as separate Threads through
             // TaskRunners
             // As soon as a task isRunnable, it is put in a queue
             // At any time, at most maxthreads tasks can be running
-            // The main thread polls the TaskRunners to check if they have
-            // finished.
+            // The main thread polls the TaskRunners to check if they have finished.
 
-            Queue<Task<? extends Serializable>> runnable = new LinkedList<Task<? extends Serializable>>();
+            Queue<Task<? extends Serializable>> runnable = new ConcurrentLinkedQueue<Task<? extends Serializable>>();
             Map<TaskResult, TaskRunner> running = new HashMap<TaskResult, TaskRunner>();
 
             DriverContext driverCxt = new DriverContext(runnable, ctx);
+            ctx.setHDFSCleanup(true);
+
+            SessionState.get().setLastMapRedStatsList(new ArrayList<MapRedStats>());
+            SessionState.get().setStackTraces(new HashMap<String, List<List<String>>>());
+            SessionState.get().setLocalMapRedErrors(new HashMap<String, List<String>>());
 
             // Add root Tasks to runnable
-
             for (Task<? extends Serializable> tsk : plan.getRootTasks()) {
+                // This should never happen, if it does, it's a bug with the potential to produce
+                // incorrect results.
+                assert tsk.getParentTasks() == null || tsk.getParentTasks().isEmpty();
                 driverCxt.addToRunnable(tsk);
             }
 
+            perfLogger.PerfLogEnd(LOG, PerfLogger.TIME_TO_SUBMIT);
             // Loop while you either have tasks running, or tasks queued up
-
             while (running.size() != 0 || runnable.peek() != null) {
                 // Launch upto maxthreads tasks
                 while (runnable.peek() != null && running.size() < maxthreads) {
                     Task<? extends Serializable> tsk = runnable.remove();
-                    console.printInfo("executing task " + tsk.getName());
                     launchTask(tsk, queryId, noName, running, jobname, jobs, driverCxt);
                 }
 
@@ -1005,12 +1152,24 @@
 
                 int exitVal = tskRes.getExitVal();
                 if (exitVal != 0) {
+                    if (tsk.ifRetryCmdWhenFail()) {
+                        if (!running.isEmpty()) {
+                            taskCleanup(running);
+                        }
+                        // in case we decided to run everything in local mode, restore the
+                        // the jobtracker setting to its initial value
+                        ctx.restoreOriginalTracker();
+                        throw new CommandNeedRetryException();
+                    }
                     Task<? extends Serializable> backupTask = tsk.getAndInitBackupTask();
                     if (backupTask != null) {
                         errorMessage = "FAILED: Execution Error, return code " + exitVal + " from "
                                 + tsk.getClass().getName();
+                        ErrorMsg em = ErrorMsg.getErrorMsg(exitVal);
+                        if (em != null) {
+                            errorMessage += ". " + em.getMsg();
+                        }
                         console.printError(errorMessage);
-
                         errorMessage = "ATTEMPT: Execute BackupTask: " + backupTask.getClass().getName();
                         console.printError(errorMessage);
 
@@ -1021,20 +1180,31 @@
                         continue;
 
                     } else {
-                        // TODO: This error messaging is not very informative.
-                        // Fix that.
+                        hookContext.setHookType(HookContext.HookType.ON_FAILURE_HOOK);
+                        // Get all the failure execution hooks and execute them.
+                        for (Hook ofh : getHooks(HiveConf.ConfVars.ONFAILUREHOOKS)) {
+                            perfLogger.PerfLogBegin(LOG, PerfLogger.FAILURE_HOOK + ofh.getClass().getName());
+
+                            ((ExecuteWithHookContext) ofh).run(hookContext);
+
+                            perfLogger.PerfLogEnd(LOG, PerfLogger.FAILURE_HOOK + ofh.getClass().getName());
+                        }
+
                         errorMessage = "FAILED: Execution Error, return code " + exitVal + " from "
                                 + tsk.getClass().getName();
+                        ErrorMsg em = ErrorMsg.getErrorMsg(exitVal);
+                        if (em != null) {
+                            errorMessage += ". " + em.getMsg();
+                        }
                         SQLState = "08S01";
                         console.printError(errorMessage);
-                        if (running.size() != 0) {
-                            taskCleanup();
+                        if (!running.isEmpty()) {
+                            taskCleanup(running);
                         }
-                        // in case we decided to run everything in local mode,
-                        // restore the
+                        // in case we decided to run everything in local mode, restore the
                         // the jobtracker setting to its initial value
                         ctx.restoreOriginalTracker();
-                        return 9;
+                        return exitVal;
                     }
                 }
 
@@ -1047,9 +1217,9 @@
                 if (tsk.getChildTasks() != null) {
                     for (Task<? extends Serializable> child : tsk.getChildTasks()) {
                         // hivesterix: don't check launchable condition
-                        // if (DriverContext.isLaunchable(child)) {
+                        //if(DriverContext.isLaunchable(tsk)){
                         driverCxt.addToRunnable(child);
-                        // }
+                        //}
                     }
                 }
             }
@@ -1059,8 +1229,7 @@
             ctx.restoreOriginalTracker();
 
             // remove incomplete outputs.
-            // Some incomplete outputs may be added at the beginning, for eg:
-            // for dynamic partitions.
+            // Some incomplete outputs may be added at the beginning, for eg: for dynamic partitions.
             // remove them
             HashSet<WriteEntity> remOutputs = new HashSet<WriteEntity>();
             for (WriteEntity output : plan.getOutputs()) {
@@ -1073,15 +1242,24 @@
                 plan.getOutputs().remove(output);
             }
 
+            hookContext.setHookType(HookContext.HookType.POST_EXEC_HOOK);
             // Get all the post execution hooks and execute them.
-            for (Hook peh : getPostExecHooks()) {
+            for (Hook peh : getHooks(HiveConf.ConfVars.POSTEXECHOOKS)) {
                 if (peh instanceof ExecuteWithHookContext) {
+                    perfLogger.PerfLogBegin(LOG, PerfLogger.POST_HOOK + peh.getClass().getName());
+
                     ((ExecuteWithHookContext) peh).run(hookContext);
+
+                    perfLogger.PerfLogEnd(LOG, PerfLogger.POST_HOOK + peh.getClass().getName());
                 } else if (peh instanceof PostExecute) {
+                    perfLogger.PerfLogBegin(LOG, PerfLogger.POST_HOOK + peh.getClass().getName());
+
                     ((PostExecute) peh)
                             .run(SessionState.get(), plan.getInputs(), plan.getOutputs(),
                                     (SessionState.get() != null ? SessionState.get().getLineageState().getLineageInfo()
                                             : null), ShimLoader.getHadoopShims().getUGIForConf(conf));
+
+                    perfLogger.PerfLogEnd(LOG, PerfLogger.POST_HOOK + peh.getClass().getName());
                 }
             }
 
@@ -1089,7 +1267,10 @@
                 SessionState.get().getHiveHistory().setQueryProperty(queryId, Keys.QUERY_RET_CODE, String.valueOf(0));
                 SessionState.get().getHiveHistory().printRowCount(queryId);
             }
+        } catch (CommandNeedRetryException e) {
+            throw e;
         } catch (Exception e) {
+            ctx.restoreOriginalTracker();
             if (SessionState.get() != null) {
                 SessionState.get().getHiveHistory().setQueryProperty(queryId, Keys.QUERY_RET_CODE, String.valueOf(12));
             }
@@ -1105,6 +1286,18 @@
             if (noName) {
                 conf.setVar(HiveConf.ConfVars.HADOOPJOBNAME, "");
             }
+            perfLogger.PerfLogEnd(LOG, PerfLogger.DRIVER_EXECUTE);
+
+            if (SessionState.get().getLastMapRedStatsList() != null
+                    && SessionState.get().getLastMapRedStatsList().size() > 0) {
+                long totalCpu = 0;
+                console.printInfo("MapReduce Jobs Launched: ");
+                for (int i = 0; i < SessionState.get().getLastMapRedStatsList().size(); i++) {
+                    console.printInfo("Job " + i + ": " + SessionState.get().getLastMapRedStatsList().get(i));
+                    totalCpu += SessionState.get().getLastMapRedStatsList().get(i).getCpuMSec();
+                }
+                console.printInfo("Total MapReduce CPU Time Spent: " + Utilities.formatMsecToStr(totalCpu));
+            }
         }
         plan.setDone();
 
@@ -1134,14 +1327,12 @@
      *            name of the task, if it is a map-reduce job
      * @param jobs
      *            number of map-reduce jobs
-     * @param curJobNo
-     *            the sequential number of the next map-reduce job
-     * @return the updated number of last the map-reduce job launched
+     * @param cxt
+     *            the driver context
      */
 
     public void launchTask(Task<? extends Serializable> tsk, String queryId, boolean noName,
             Map<TaskResult, TaskRunner> running, String jobname, int jobs, DriverContext cxt) {
-
         if (SessionState.get() != null) {
             SessionState.get().getHiveHistory().startTask(queryId, tsk, tsk.getClass().getName());
         }
@@ -1149,6 +1340,8 @@
             if (noName) {
                 conf.setVar(HiveConf.ConfVars.HADOOPJOBNAME, jobname + "(" + tsk.getId() + ")");
             }
+            conf.set("mapreduce.workflow.node.name", tsk.getId());
+            Utilities.setWorkflowAdjacencies(conf, plan);
             cxt.incCurJobNo(1);
             console.printInfo("Launching Job " + cxt.getCurJobNo() + " out of " + jobs);
         }
@@ -1156,7 +1349,13 @@
         TaskResult tskRes = new TaskResult();
         TaskRunner tskRun = new TaskRunner(tsk, tskRes);
 
-        // HiveConf.getBoolVar(conf, HiveConf.ConfVars.EXECPARALLEL) &&
+        // Launch Task
+        //if (HiveConf.getBoolVar(conf, HiveConf.ConfVars.EXECPARALLEL) && tsk.isMapRedTask()) {
+        // Launch it in the parallel mode, as a separate thread only for MR tasks
+        //  tskRun.start();
+        //} else {
+        //  tskRun.runSequential();
+        //}
         // Launch Task: hivesterix tweak
         if (tsk instanceof MapRedTask || tsk instanceof StatsTask) {
             // Launch it in the parallel mode, as a separate thread only for MR
@@ -1169,11 +1368,27 @@
             if (crs instanceof ConditionalResolverMergeFiles) {
                 tskRes.setRunning(false);
                 tskRes.setExitVal(0);
-
-                List<Task<? extends Serializable>> children = condTask.getListTasks();
-                for (Task<? extends Serializable> child : children)
-                    if (child instanceof MapRedTask)
-                        cxt.addToRunnable(child);
+                if (!executedConditionalTsks.contains(tsk)) {
+                    List<Task<? extends Serializable>> children = condTask.getListTasks();
+                    Task<? extends Serializable> selectedBranch = null;
+                    for (Task<? extends Serializable> branch : children) {
+                        if (branch instanceof MoveTask) {
+                            selectedBranch = branch;
+                            break;
+                        }
+                    }
+                    if (selectedBranch == null) {
+                        for (int i = children.size() - 1; i >= 0; i--) {
+                            Task<? extends Serializable> child = children.get(i);
+                            if (child instanceof MapRedTask) {
+                                selectedBranch = child;
+                                break;
+                            }
+                        }
+                    }
+                    executedConditionalTsks.add(tsk);
+                    cxt.addToRunnable(selectedBranch);
+                }
             }
         } else {
             tskRun.runSequential();
@@ -1185,12 +1400,18 @@
     /**
      * Cleans up remaining tasks in case of failure
      */
-
-    public void taskCleanup() {
-        // The currently existing Shutdown hooks will be automatically called,
-        // killing the map-reduce processes.
-        // The non MR processes will be killed as well.
-        System.exit(9);
+    public void taskCleanup(Map<TaskResult, TaskRunner> running) {
+        for (Map.Entry<TaskResult, TaskRunner> entry : running.entrySet()) {
+            if (entry.getKey().isRunning()) {
+                Task<?> task = entry.getValue().getTask();
+                try {
+                    task.shutdown();
+                } catch (Exception e) {
+                    console.printError("Exception on shutting down task " + task.getId() + ": " + e);
+                }
+            }
+        }
+        running.clear();
     }
 
     /**
@@ -1214,7 +1435,7 @@
             // In this loop, nothing was found
             // Sleep 10 seconds and restart
             try {
-                Thread.sleep(sleeptime);
+                Thread.sleep(SLEEP_TIME);
             } catch (InterruptedException ie) {
                 // Do Nothing
                 ;
@@ -1223,7 +1444,7 @@
         }
     }
 
-    public boolean getResults(ArrayList<String> res) throws IOException {
+    public boolean getResults(ArrayList<String> res) throws IOException, CommandNeedRetryException {
         if (plan != null && plan.getFetchTask() != null) {
             FetchTask ft = plan.getFetchTask();
             ft.setMaxRows(maxRows);
@@ -1276,6 +1497,14 @@
         return true;
     }
 
+    public int getTryCount() {
+        return tryCount;
+    }
+
+    public void setTryCount(int tryCount) {
+        this.tryCount = tryCount;
+    }
+
     public int close() {
         try {
             if (plan != null) {
@@ -1308,18 +1537,21 @@
     }
 
     public void destroy() {
-        releaseLocks();
+        if (ctx != null) {
+            releaseLocks(ctx.getHiveLocks());
+        }
+
+        if (hiveLockMgr != null) {
+            try {
+                hiveLockMgr.close();
+            } catch (LockException e) {
+                LOG.warn("Exception in closing hive lock manager. "
+                        + org.apache.hadoop.util.StringUtils.stringifyException(e));
+            }
+        }
     }
 
     public org.apache.hadoop.hive.ql.plan.api.Query getQueryPlan() throws IOException {
         return plan.getQueryPlan();
     }
-
-    public int getTryCount() {
-        return tryCount;
-    }
-
-    public void setTryCount(int tryCount) {
-        this.tryCount = tryCount;
-    }
 }
diff --git a/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFCount.java b/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFCount.java
index 2d5191d..1b96259 100644
--- a/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFCount.java
+++ b/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFCount.java
@@ -68,6 +68,7 @@
     @Override
     public GenericUDAFEvaluator getEvaluator(GenericUDAFParameterInfo paramInfo) throws SemanticException {
 
+        @SuppressWarnings("deprecation")
         TypeInfo[] parameters = paramInfo.getParameters();
 
         if (parameters.length == 0) {
diff --git a/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/serde2/typeinfo/TypeInfoFactory.java b/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/serde2/typeinfo/TypeInfoFactory.java
index 0fea4b9..e26f477 100644
--- a/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/serde2/typeinfo/TypeInfoFactory.java
+++ b/hivesterix/hivesterix-dist/src/main/java/org/apache/hadoop/hive/serde2/typeinfo/TypeInfoFactory.java
@@ -36,7 +36,7 @@
 import java.util.List;
 import java.util.concurrent.ConcurrentHashMap;
 
-import org.apache.hadoop.hive.serde.Constants;
+import org.apache.hadoop.hive.serde.serdeConstants;
 import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorUtils;
 
 /**
@@ -65,15 +65,18 @@
         return result;
     }
 
-    public static final TypeInfo voidTypeInfo = getPrimitiveTypeInfo(Constants.VOID_TYPE_NAME);
-    public static final TypeInfo booleanTypeInfo = getPrimitiveTypeInfo(Constants.BOOLEAN_TYPE_NAME);
-    public static final TypeInfo intTypeInfo = getPrimitiveTypeInfo(Constants.INT_TYPE_NAME);
-    public static final TypeInfo longTypeInfo = getPrimitiveTypeInfo(Constants.BIGINT_TYPE_NAME);
-    public static final TypeInfo stringTypeInfo = getPrimitiveTypeInfo(Constants.STRING_TYPE_NAME);
-    public static final TypeInfo floatTypeInfo = getPrimitiveTypeInfo(Constants.FLOAT_TYPE_NAME);
-    public static final TypeInfo doubleTypeInfo = getPrimitiveTypeInfo(Constants.DOUBLE_TYPE_NAME);
-    public static final TypeInfo byteTypeInfo = getPrimitiveTypeInfo(Constants.TINYINT_TYPE_NAME);
-    public static final TypeInfo shortTypeInfo = getPrimitiveTypeInfo(Constants.SMALLINT_TYPE_NAME);
+    public static final TypeInfo voidTypeInfo = getPrimitiveTypeInfo(serdeConstants.VOID_TYPE_NAME);
+    public static final TypeInfo booleanTypeInfo = getPrimitiveTypeInfo(serdeConstants.BOOLEAN_TYPE_NAME);
+    public static final TypeInfo intTypeInfo = getPrimitiveTypeInfo(serdeConstants.INT_TYPE_NAME);
+    public static final TypeInfo longTypeInfo = getPrimitiveTypeInfo(serdeConstants.BIGINT_TYPE_NAME);
+    public static final TypeInfo stringTypeInfo = getPrimitiveTypeInfo(serdeConstants.STRING_TYPE_NAME);
+    public static final TypeInfo floatTypeInfo = getPrimitiveTypeInfo(serdeConstants.FLOAT_TYPE_NAME);
+    public static final TypeInfo doubleTypeInfo = getPrimitiveTypeInfo(serdeConstants.DOUBLE_TYPE_NAME);
+    public static final TypeInfo byteTypeInfo = getPrimitiveTypeInfo(serdeConstants.TINYINT_TYPE_NAME);
+    public static final TypeInfo shortTypeInfo = getPrimitiveTypeInfo(serdeConstants.SMALLINT_TYPE_NAME);
+    public static final TypeInfo timestampTypeInfo = getPrimitiveTypeInfo(serdeConstants.TIMESTAMP_TYPE_NAME);
+    public static final TypeInfo binaryTypeInfo = getPrimitiveTypeInfo(serdeConstants.BINARY_TYPE_NAME);
+    public static final TypeInfo decimalTypeInfo = getPrimitiveTypeInfo(serdeConstants.DECIMAL_TYPE_NAME);
 
     public static final TypeInfo unknownTypeInfo = getPrimitiveTypeInfo("unknown");
 
diff --git a/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/test/runtimefunction/RuntimeFunctionTestSuite.java b/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/test/runtimefunction/RuntimeFunctionTestSuite.java
index b024269..5fdfb3a 100644
--- a/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/test/runtimefunction/RuntimeFunctionTestSuite.java
+++ b/hivesterix/hivesterix-dist/src/test/java/edu/uci/ics/hivesterix/test/runtimefunction/RuntimeFunctionTestSuite.java
@@ -12,77 +12,77 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.hivesterix.test.runtimefunction;
-
-import java.io.File;
-import java.util.List;
-
-import junit.framework.Test;
-import junit.framework.TestResult;
-import edu.uci.ics.hivesterix.test.base.AbstractTestSuiteClass;
-
-public class RuntimeFunctionTestSuite extends AbstractTestSuiteClass {
-
-    private static final String PATH_TO_QUERIES = "src/test/resources/runtimefunctionts/queries/";
-    private static final String PATH_TO_RESULTS = "src/test/resources/runtimefunctionts/results/";
-    private static final String PATH_TO_IGNORES = "src/test/resources/runtimefunctionts/ignore.txt";
-
-    private static final String FILE_EXTENSION_OF_RESULTS = "result";
-
-    public static Test suite() throws Exception {
-        List<String> ignores = getIgnoreList(PATH_TO_IGNORES);
-        File testData = new File(PATH_TO_QUERIES);
-        File[] queries = testData.listFiles();
-        RuntimeFunctionTestSuite testSuite = new RuntimeFunctionTestSuite();
-
-        // set hdfs and hyracks cluster, and load test data to hdfs
-        try {
-            testSuite.setup();
-            testSuite.loadData();
-        } catch (Exception e) {
-            e.printStackTrace();
-            throw new IllegalStateException(e.getMessage());
-        }
-
-        for (File qFile : queries) {
-            if (isIgnored(qFile.getName(), ignores))
-                continue;
-
-            if (qFile.isFile()) {
-                String resultFileName = hiveExtToResExt(qFile.getName());
-                File rFile = new File(PATH_TO_RESULTS + resultFileName);
-                testSuite.addTest(new RuntimeFunctionTestCase(qFile, rFile));
-            }
-        }
-        return testSuite;
-    }
-
-    private static String hiveExtToResExt(String fname) {
-        int dot = fname.lastIndexOf('.');
-        return fname.substring(0, dot + 1) + FILE_EXTENSION_OF_RESULTS;
-    }
-
-    /**
-     * Runs the tests and collects their result in a TestResult.
-     */
-    @Override
-    public void run(TestResult result) {
-
-        int testCount = countTestCases();
-        for (int i = 0; i < testCount; i++) {
-            Test each = this.testAt(i);
-            if (result.shouldStop())
-                break;
-            runTest(each, result);
-        }
-
-        // cleanup hdfs and hyracks cluster
-        try {
-            cleanup();
-        } catch (Exception e) {
-            e.printStackTrace();
-            throw new IllegalStateException(e.getMessage());
-        }
-    }
-
-}
+package edu.uci.ics.hivesterix.test.runtimefunction;
+
+import java.io.File;
+import java.util.List;
+
+import junit.framework.Test;
+import junit.framework.TestResult;
+import edu.uci.ics.hivesterix.test.base.AbstractTestSuiteClass;
+
+public class RuntimeFunctionTestSuite extends AbstractTestSuiteClass {
+
+    private static final String PATH_TO_QUERIES = "src/test/resources/runtimefunctionts/queries/";
+    private static final String PATH_TO_RESULTS = "src/test/resources/runtimefunctionts/results/";
+    private static final String PATH_TO_IGNORES = "src/test/resources/runtimefunctionts/ignore.txt";
+
+    private static final String FILE_EXTENSION_OF_RESULTS = "result";
+
+    public static Test suite() throws Exception {
+        List<String> ignores = getIgnoreList(PATH_TO_IGNORES);
+        File testData = new File(PATH_TO_QUERIES);
+        File[] queries = testData.listFiles();
+        RuntimeFunctionTestSuite testSuite = new RuntimeFunctionTestSuite();
+
+        // set hdfs and hyracks cluster, and load test data to hdfs
+        try {
+            testSuite.setup();
+            testSuite.loadData();
+        } catch (Exception e) {
+            e.printStackTrace();
+            throw new IllegalStateException(e.getMessage());
+        }
+
+        for (File qFile : queries) {
+            if (isIgnored(qFile.getName(), ignores))
+                continue;
+
+            if (qFile.isFile()) {
+                String resultFileName = hiveExtToResExt(qFile.getName());
+                File rFile = new File(PATH_TO_RESULTS + resultFileName);
+                testSuite.addTest(new RuntimeFunctionTestCase(qFile, rFile));
+            }
+        }
+        return testSuite;
+    }
+
+    private static String hiveExtToResExt(String fname) {
+        int dot = fname.lastIndexOf('.');
+        return fname.substring(0, dot + 1) + FILE_EXTENSION_OF_RESULTS;
+    }
+
+    /**
+     * Runs the tests and collects their result in a TestResult.
+     */
+    @Override
+    public void run(TestResult result) {
+
+        int testCount = countTestCases();
+        for (int i = 0; i < testCount; i++) {
+            Test each = this.testAt(i);
+            if (result.shouldStop())
+                break;
+            runTest(each, result);
+        }
+
+        // cleanup hdfs and hyracks cluster
+        try {
+            cleanup();
+        } catch (Exception e) {
+            e.printStackTrace();
+            throw new IllegalStateException(e.getMessage());
+        }
+    }
+
+}
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q10_returned_item.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q10_returned_item.hive
index 3f1214a..bb07665 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q10_returned_item.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q10_returned_item.hive
@@ -13,9 +13,6 @@
 -- create the result table
 create table q10_returned_item (c_custkey int, c_name string, revenue double, c_acctbal string, n_name string, c_address string, c_phone string, c_comment string);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1024000000;
-
 -- the query
 insert overwrite table q10_returned_item
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q12_shipping.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q12_shipping.hive
index 062f7b9..ae2fa3a 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q12_shipping.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q12_shipping.hive
@@ -9,8 +9,6 @@
 -- create the result table
 create table q12_shipping(l_shipmode string, high_line_count double, low_line_count double);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1225000000;
 
 -- the query
 insert overwrite table q12_shipping
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q14_promotion_effect.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q14_promotion_effect.hive
index 988f400..4644d23 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q14_promotion_effect.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q14_promotion_effect.hive
@@ -9,9 +9,6 @@
 -- create the result table
 create table q14_promotion_effect(promo_revenue double);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1040000000;
-
 -- the query
 insert overwrite table q14_promotion_effect
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q15_top_supplier.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q15_top_supplier.hive
index 04064ed..8fa333e 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q15_top_supplier.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q15_top_supplier.hive
@@ -14,8 +14,6 @@
 create table q15_top_supplier(s_suppkey int, s_name string, s_address string, s_phone string, total_revenue double);
 
 
-set mapred.min.split.size=536870912;
-
 -- the query
 insert overwrite table revenue
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q18_large_volume_customer.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q18_large_volume_customer.hive
index 76d0475..c617c26 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q18_large_volume_customer.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q18_large_volume_customer.hive
@@ -13,8 +13,6 @@
 create table q18_tmp(l_orderkey int, t_sum_quantity double);
 create table q18_large_volume_customer(c_name string, c_custkey int, o_orderkey int, o_orderdate string, o_totalprice double, sum_quantity double);
 
-set mapred.min.split.size=268435456;
-set hive.exec.reducers.bytes.per.reducer=1164000000;
 
 -- the query
 insert overwrite table q18_tmp
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q19_discounted_revenue.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q19_discounted_revenue.hive
index fd330cd..a7a0a0a 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q19_discounted_revenue.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q19_discounted_revenue.hive
@@ -9,8 +9,6 @@
 -- create the result table
 create table q19_discounted_revenue(revenue double);
 
-set mapred.min.split.size=268435456;
-set hive.exec.reducers.bytes.per.reducer=1040000000;
 
 -- the query
 insert overwrite table q19_discounted_revenue
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q1_pricing_summary_report.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q1_pricing_summary_report.hive
index a002068..af64a4f 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q1_pricing_summary_report.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q1_pricing_summary_report.hive
@@ -7,8 +7,6 @@
 -- create the target table
 CREATE TABLE q1_pricing_summary_report ( L_RETURNFLAG STRING, L_LINESTATUS STRING, SUM_QTY DOUBLE, SUM_BASE_PRICE DOUBLE, SUM_DISC_PRICE DOUBLE, SUM_CHARGE DOUBLE, AVE_QTY DOUBLE, AVE_PRICE DOUBLE, AVE_DISC DOUBLE, COUNT_ORDER INT);
 
-set mapred.min.split.size=536870912;
-
 -- the query
 INSERT OVERWRITE TABLE q1_pricing_summary_report 
 SELECT 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q20_potential_part_promotion.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q20_potential_part_promotion.hive
index 63297e6..3149962 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q20_potential_part_promotion.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q20_potential_part_promotion.hive
@@ -22,7 +22,6 @@
 create table q20_tmp4(ps_suppkey int);
 create table q20_potential_part_promotion(s_name string, s_address string);
 
-set mapred.min.split.size=536870912;
 
 -- the query
 insert overwrite table q20_tmp1
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q3_shipping_priority.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q3_shipping_priority.hive
index 0049eb3..67f6dc4 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q3_shipping_priority.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q3_shipping_priority.hive
@@ -11,9 +11,6 @@
 -- create the target table
 create table q3_shipping_priority (l_orderkey int, revenue double, o_orderdate string, o_shippriority int);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1024000000;
-
 -- the query
 Insert overwrite table q3_shipping_priority 
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q4_order_priority.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q4_order_priority.hive
index aa828e9..efbcff2 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q4_order_priority.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q4_order_priority.hive
@@ -11,7 +11,6 @@
 CREATE TABLE q4_order_priority_tmp (O_ORDERKEY INT);
 CREATE TABLE q4_order_priority (O_ORDERPRIORITY STRING, ORDER_COUNT INT);
 
-set mapred.min.split.size=536870912;
 -- the query
 INSERT OVERWRITE TABLE q4_order_priority_tmp 
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q5_local_supplier_volume.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q5_local_supplier_volume.hive
index a975ce1..091f000 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q5_local_supplier_volume.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q5_local_supplier_volume.hive
@@ -17,7 +17,6 @@
 -- create the target table
 create table q5_local_supplier_volume (N_NAME STRING, REVENUE DOUBLE);
 
-set mapred.min.split.size=536870912;
 
 -- the query
 insert overwrite table q5_local_supplier_volume 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q7_volume_shipping.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q7_volume_shipping.hive
index 3dfb22a..444644f 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q7_volume_shipping.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q7_volume_shipping.hive
@@ -17,8 +17,6 @@
 create table q7_volume_shipping (supp_nation string, cust_nation string, l_year int, revenue double);
 create table q7_volume_shipping_tmp(supp_nation string, cust_nation string, s_nationkey int, c_nationkey int);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1225000000;
 
 -- the query
 insert overwrite table q7_volume_shipping_tmp
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q9_product_type_profit.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q9_product_type_profit.hive
index 586779c..a9bb58b 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q9_product_type_profit.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/q9_product_type_profit.hive
@@ -17,8 +17,6 @@
 -- create the result table
 create table q9_product_type_profit (nation string, o_year string, sum_profit double);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1024000000;
 
 -- the query
 insert overwrite table q9_product_type_profit
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/u7_multi_join.hive b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/u7_multi_join.hive
index 2891c56..70b3538 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/u7_multi_join.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/queries/u7_multi_join.hive
@@ -6,4 +6,7 @@
 create external table orders (O_ORDERKEY INT, O_CUSTKEY INT, O_ORDERSTATUS STRING, O_TOTALPRICE DOUBLE, O_ORDERDATE STRING, O_ORDERPRIORITY STRING, O_CLERK STRING, O_SHIPPRIORITY INT, O_COMMENT STRING) ROW FORMAT DELIMITED FIELDS TERMINATED BY '|' STORED AS TEXTFILE LOCATION '/tpch/orders';
 create external table customer (C_CUSTKEY INT, C_NAME STRING, C_ADDRESS STRING, C_NATIONKEY INT, C_PHONE STRING, C_ACCTBAL DOUBLE, C_MKTSEGMENT STRING, C_COMMENT STRING) ROW FORMAT DELIMITED FIELDS TERMINATED BY '|' STORED AS TEXTFILE LOCATION '/tpch/customer';
 
-select l_linenumber, o_orderkey, o_totalprice, o_orderdate, o_shippriority from  customer c join orders o  on c.c_custkey = o.o_custkey join lineitem l    on o.o_orderkey = l.l_orderkey  where c.c_custkey<5 and o.o_totalprice<30000;
+select l_linenumber, o_orderkey, o_totalprice, o_orderdate, o_shippriority from 
+ customer c join orders o  on c.c_custkey = o.o_custkey 
+ join lineitem l    on o.o_orderkey = l.l_orderkey  
+ where c.c_custkey<5 and o.o_totalprice<30000;
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q10_returned_item.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q10_returned_item.plan
index 05b3718..2629f1a 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q10_returned_item.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q10_returned_item.plan
@@ -82,7 +82,7 @@
                                                 -- HASH_PARTITION_EXCHANGE [$$30]  |PARTITIONED|
                                                   project ([$$30, $$29])
                                                   -- STREAM_PROJECT  |PARTITIONED|
-                                                    select (function-call: algebricks:and, Args:[function-call: algebricks:lt, Args:[%0->$$33, 1994-01-01], function-call: algebricks:ge, Args:[%0->$$33, 1993-10-01], function-call: algebricks:lt, Args:[%0->$$33, 1994-01-01]])
+                                                    select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$33, 1993-10-01], function-call: algebricks:lt, Args:[%0->$$33, 1994-01-01]])
                                                     -- STREAM_SELECT  |PARTITIONED|
                                                       exchange 
                                                       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q12_shipping.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q12_shipping.plan
index 5c240e2..623f894 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q12_shipping.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q12_shipping.plan
@@ -38,7 +38,7 @@
                           -- HASH_PARTITION_EXCHANGE [$$10]  |PARTITIONED|
                             project ([$$10, $$24])
                             -- STREAM_PROJECT  |PARTITIONED|
-                              select (function-call: algebricks:and, Args:[function-call: algebricks:lt, Args:[%0->$$22, 1995-01-01], function-call: algebricks:ge, Args:[%0->$$22, 1994-01-01], function-call: algebricks:lt, Args:[%0->$$20, %0->$$21], function-call: algebricks:lt, Args:[%0->$$21, %0->$$22], function-call: algebricks:lt, Args:[%0->$$20, %0->$$21], function-call: algebricks:ge, Args:[%0->$$22, 1994-01-01], function-call: algebricks:lt, Args:[%0->$$22, 1995-01-01], function-call: algebricks:or, Args:[function-call: algebricks:eq, Args:[%0->$$24, MAIL], function-call: algebricks:eq, Args:[%0->$$24, SHIP]], function-call: algebricks:or, Args:[function-call: algebricks:eq, Args:[%0->$$24, MAIL], function-call: algebricks:eq, Args:[%0->$$24, SHIP]]])
+                              select (function-call: algebricks:and, Args:[function-call: algebricks:lt, Args:[%0->$$21, %0->$$22], function-call: algebricks:lt, Args:[%0->$$20, %0->$$21], function-call: algebricks:ge, Args:[%0->$$22, 1994-01-01], function-call: algebricks:lt, Args:[%0->$$22, 1995-01-01], function-call: algebricks:or, Args:[function-call: algebricks:eq, Args:[%0->$$24, MAIL], function-call: algebricks:eq, Args:[%0->$$24, SHIP]]])
                               -- STREAM_SELECT  |PARTITIONED|
                                 exchange 
                                 -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q13_customer_distribution.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q13_customer_distribution.plan
index 19bcd24..55bd51b 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q13_customer_distribution.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q13_customer_distribution.plan
@@ -10,17 +10,17 @@
         -- STABLE_SORT [$$21(DESC), $$20(DESC)]  |LOCAL|
           exchange 
           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-            group by ([$$20 := %0->$$28]) decor ([]) {
-                      aggregate [$$21] <- [function-call: hive:count(FINAL), Args:[%0->$$27]]
+            group by ([$$20 := %0->$$26]) decor ([]) {
+                      aggregate [$$21] <- [function-call: hive:count(FINAL), Args:[%0->$$25]]
                       -- AGGREGATE  |LOCAL|
                         nested tuple source
                         -- NESTED_TUPLE_SOURCE  |LOCAL|
                    }
-            -- EXTERNAL_GROUP_BY[$$28]  |PARTITIONED|
+            -- EXTERNAL_GROUP_BY[$$26]  |PARTITIONED|
               exchange 
-              -- HASH_PARTITION_EXCHANGE [$$28]  |PARTITIONED|
-                group by ([$$28 := %0->$$19]) decor ([]) {
-                          aggregate [$$27] <- [function-call: hive:count(PARTIAL1), Args:[1]]
+              -- HASH_PARTITION_EXCHANGE [$$26]  |PARTITIONED|
+                group by ([$$26 := %0->$$19]) decor ([]) {
+                          aggregate [$$25] <- [function-call: hive:count(PARTIAL1), Args:[1]]
                           -- AGGREGATE  |LOCAL|
                             nested tuple source
                             -- NESTED_TUPLE_SOURCE  |LOCAL|
@@ -32,49 +32,40 @@
                     -- STREAM_PROJECT  |PARTITIONED|
                       exchange 
                       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                        group by ([$$18 := %0->$$26]) decor ([]) {
-                                  aggregate [$$19] <- [function-call: hive:count(FINAL), Args:[%0->$$25]]
+                        group by ([$$18 := %0->$$10]) decor ([]) {
+                                  aggregate [$$19] <- [function-call: hive:count(COMPLETE), Args:[%0->$$1]]
                                   -- AGGREGATE  |LOCAL|
                                     nested tuple source
                                     -- NESTED_TUPLE_SOURCE  |LOCAL|
                                }
-                        -- EXTERNAL_GROUP_BY[$$26]  |PARTITIONED|
+                        -- EXTERNAL_GROUP_BY[$$10]  |PARTITIONED|
                           exchange 
-                          -- HASH_PARTITION_EXCHANGE [$$26]  |PARTITIONED|
-                            group by ([$$26 := %0->$$10]) decor ([]) {
-                                      aggregate [$$25] <- [function-call: hive:count(PARTIAL1), Args:[%0->$$1]]
-                                      -- AGGREGATE  |LOCAL|
-                                        nested tuple source
-                                        -- NESTED_TUPLE_SOURCE  |LOCAL|
-                                   }
-                            -- EXTERNAL_GROUP_BY[$$10]  |LOCAL|
+                          -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                            project ([$$10, $$1])
+                            -- STREAM_PROJECT  |PARTITIONED|
                               exchange 
                               -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                project ([$$10, $$1])
-                                -- STREAM_PROJECT  |PARTITIONED|
+                                left outer join (function-call: algebricks:eq, Args:[%0->$$2, %0->$$10])
+                                -- HYBRID_HASH_JOIN [$$10][$$2]  |PARTITIONED|
                                   exchange 
-                                  -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                    left outer join (function-call: algebricks:eq, Args:[%0->$$2, %0->$$10])
-                                    -- HYBRID_HASH_JOIN [$$10][$$2]  |PARTITIONED|
+                                  -- HASH_PARTITION_EXCHANGE [$$10]  |PARTITIONED|
+                                    data-scan [$$10]<-[$$10, $$11, $$12, $$13, $$14, $$15, $$16, $$17] <- default.customer
+                                    -- DATASOURCE_SCAN  |PARTITIONED|
                                       exchange 
-                                      -- HASH_PARTITION_EXCHANGE [$$10]  |PARTITIONED|
-                                        data-scan [$$10]<-[$$10, $$11, $$12, $$13, $$14, $$15, $$16, $$17] <- default.customer
-                                        -- DATASOURCE_SCAN  |PARTITIONED|
-                                          exchange 
-                                          -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                            empty-tuple-source
-                                            -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
-                                      exchange 
-                                      -- HASH_PARTITION_EXCHANGE [$$2]  |PARTITIONED|
-                                        project ([$$2, $$1])
-                                        -- STREAM_PROJECT  |PARTITIONED|
-                                          select (function-call: algebricks:not, Args:[function-call: hive:org.apache.hadoop.hive.ql.udf.UDFLike, Args:[%0->$$9, %special%requests%]])
-                                          -- STREAM_SELECT  |PARTITIONED|
+                                      -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                        empty-tuple-source
+                                        -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                                  exchange 
+                                  -- HASH_PARTITION_EXCHANGE [$$2]  |PARTITIONED|
+                                    project ([$$2, $$1])
+                                    -- STREAM_PROJECT  |PARTITIONED|
+                                      select (function-call: algebricks:not, Args:[function-call: hive:org.apache.hadoop.hive.ql.udf.UDFLike, Args:[%0->$$9, %special%requests%]])
+                                      -- STREAM_SELECT  |PARTITIONED|
+                                        exchange 
+                                        -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                          data-scan [$$1, $$2, $$9]<-[$$1, $$2, $$3, $$4, $$5, $$6, $$7, $$8, $$9] <- default.orders
+                                          -- DATASOURCE_SCAN  |PARTITIONED|
                                             exchange 
                                             -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                              data-scan [$$1, $$2, $$9]<-[$$1, $$2, $$3, $$4, $$5, $$6, $$7, $$8, $$9] <- default.orders
-                                              -- DATASOURCE_SCAN  |PARTITIONED|
-                                                exchange 
-                                                -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                                                  empty-tuple-source
-                                                  -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                                              empty-tuple-source
+                                              -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q14_promotion_effect.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q14_promotion_effect.plan
index 21b90bd..35055a4 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q14_promotion_effect.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q14_promotion_effect.plan
@@ -34,7 +34,7 @@
                       -- HASH_PARTITION_EXCHANGE [$$11]  |PARTITIONED|
                         project ([$$11, $$15, $$16])
                         -- STREAM_PROJECT  |PARTITIONED|
-                          select (function-call: algebricks:and, Args:[function-call: algebricks:lt, Args:[%0->$$20, 1995-10-01], function-call: algebricks:ge, Args:[%0->$$20, 1995-09-01], function-call: algebricks:lt, Args:[%0->$$20, 1995-10-01]])
+                          select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$20, 1995-09-01], function-call: algebricks:lt, Args:[%0->$$20, 1995-10-01]])
                           -- STREAM_SELECT  |PARTITIONED|
                             exchange 
                             -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q15_top_supplier.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q15_top_supplier.plan
index a5bd27a..a4db8a7 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q15_top_supplier.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q15_top_supplier.plan
@@ -24,7 +24,7 @@
             -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
               project ([$$3, $$6, $$7])
               -- STREAM_PROJECT  |PARTITIONED|
-                select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$11, 1996-01-01], function-call: algebricks:lt, Args:[%0->$$11, 1996-04-01], function-call: algebricks:ge, Args:[%0->$$11, 1996-01-01], function-call: algebricks:lt, Args:[%0->$$11, 1996-04-01]])
+                select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$11, 1996-01-01], function-call: algebricks:lt, Args:[%0->$$11, 1996-04-01]])
                 -- STREAM_SELECT  |PARTITIONED|
                   exchange 
                   -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q16_parts_supplier_relationship.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q16_parts_supplier_relationship.plan
index 9835346..d1c0578 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q16_parts_supplier_relationship.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q16_parts_supplier_relationship.plan
@@ -38,7 +38,7 @@
               -- HYBRID_HASH_JOIN [$$2][$$11]  |PARTITIONED|
                 exchange 
                 -- HASH_PARTITION_EXCHANGE [$$2]  |PARTITIONED|
-                  select (function-call: algebricks:and, Args:[function-call: algebricks:not, Args:[function-call: hive:org.apache.hadoop.hive.ql.udf.UDFLike, Args:[%0->$$6, MEDIUM POLISHED%]], function-call: algebricks:neq, Args:[%0->$$5, Brand#45], function-call: algebricks:not, Args:[function-call: hive:org.apache.hadoop.hive.ql.udf.UDFLike, Args:[%0->$$6, MEDIUM POLISHED%]]])
+                  select (function-call: algebricks:and, Args:[function-call: algebricks:neq, Args:[%0->$$5, Brand#45], function-call: algebricks:not, Args:[function-call: hive:org.apache.hadoop.hive.ql.udf.UDFLike, Args:[%0->$$6, MEDIUM POLISHED%]]])
                   -- STREAM_SELECT  |PARTITIONED|
                     exchange 
                     -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q17_small_quantity_order_revenue.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q17_small_quantity_order_revenue.plan
index a827007..714a56e 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q17_small_quantity_order_revenue.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q17_small_quantity_order_revenue.plan
@@ -84,7 +84,7 @@
                                 -- HASH_PARTITION_EXCHANGE [$$3]  |PARTITIONED|
                                   project ([$$3])
                                   -- STREAM_PROJECT  |PARTITIONED|
-                                    select (function-call: algebricks:and, Args:[function-call: algebricks:eq, Args:[%0->$$9, MED BOX], function-call: algebricks:eq, Args:[%0->$$6, Brand#23], function-call: algebricks:eq, Args:[%0->$$9, MED BOX]])
+                                    select (function-call: algebricks:and, Args:[function-call: algebricks:eq, Args:[%0->$$6, Brand#23], function-call: algebricks:eq, Args:[%0->$$9, MED BOX]])
                                     -- STREAM_SELECT  |PARTITIONED|
                                       exchange 
                                       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q18_large_volume_customer.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q18_large_volume_customer.plan
index ea47ea0..d0e1630 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q18_large_volume_customer.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q18_large_volume_customer.plan
@@ -90,7 +90,7 @@
                                         -- HASH_PARTITION_EXCHANGE [$$1]  |PARTITIONED|
                                           project ([$$1])
                                           -- STREAM_PROJECT  |PARTITIONED|
-                                            select (function-call: algebricks:gt, Args:[%0->$$2, 300])
+                                            select (function-call: algebricks:gt, Args:[%0->$$2, 300.0])
                                             -- STREAM_SELECT  |PARTITIONED|
                                               exchange 
                                               -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q19_discounted_revenue.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q19_discounted_revenue.plan
index 1827729..25d1696 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q19_discounted_revenue.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q19_discounted_revenue.plan
@@ -22,7 +22,7 @@
           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
             project ([$$15, $$16])
             -- STREAM_PROJECT  |PARTITIONED|
-              select (function-call: algebricks:or, Args:[function-call: algebricks:or, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:eq, Args:[%0->$$4, Brand#12], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$7, SM CASE||SM BOX||SM PACK||SM PKG]], function-call: algebricks:ge, Args:[%0->$$14, 1]], function-call: algebricks:le, Args:[%0->$$14, 11]], function-call: algebricks:ge, Args:[%0->$$6, 1]], function-call: algebricks:le, Args:[%0->$$6, 5]], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$24, AIR||AIR REG]], function-call: algebricks:eq, Args:[%0->$$23, DELIVER IN PERSON]], function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:eq, Args:[%0->$$4, Brand#23], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$7, MED BAG||MED BOX||MED PKG||MED PACK]], function-call: algebricks:ge, Args:[%0->$$14, 10]], function-call: algebricks:le, Args:[%0->$$14, 20]], function-call: algebricks:ge, Args:[%0->$$6, 1]], function-call: algebricks:le, Args:[%0->$$6, 10]], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$24, AIR||AIR REG]], function-call: algebricks:eq, Args:[%0->$$23, DELIVER IN PERSON]]], function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:eq, Args:[%0->$$4, Brand#34], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$7, LG CASE||LG BOX||LG PACK||LG PKG]], function-call: algebricks:ge, Args:[%0->$$14, 20]], function-call: algebricks:le, Args:[%0->$$14, 30]], function-call: algebricks:ge, Args:[%0->$$6, 1]], function-call: algebricks:le, Args:[%0->$$6, 15]], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$24, AIR||AIR REG]], function-call: algebricks:eq, Args:[%0->$$23, DELIVER IN PERSON]]])
+              select (function-call: algebricks:or, Args:[function-call: algebricks:or, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:eq, Args:[%0->$$4, Brand#12], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$7, SM CASE||SM BOX||SM PACK||SM PKG]], function-call: algebricks:ge, Args:[%0->$$14, 1.0]], function-call: algebricks:le, Args:[%0->$$14, 11.0]], function-call: algebricks:ge, Args:[%0->$$6, 1]], function-call: algebricks:le, Args:[%0->$$6, 5]], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$24, AIR||AIR REG]], function-call: algebricks:eq, Args:[%0->$$23, DELIVER IN PERSON]], function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:eq, Args:[%0->$$4, Brand#23], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$7, MED BAG||MED BOX||MED PKG||MED PACK]], function-call: algebricks:ge, Args:[%0->$$14, 10.0]], function-call: algebricks:le, Args:[%0->$$14, 20.0]], function-call: algebricks:ge, Args:[%0->$$6, 1]], function-call: algebricks:le, Args:[%0->$$6, 10]], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$24, AIR||AIR REG]], function-call: algebricks:eq, Args:[%0->$$23, DELIVER IN PERSON]]], function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:and, Args:[function-call: algebricks:eq, Args:[%0->$$4, Brand#34], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$7, LG CASE||LG BOX||LG PACK||LG PKG]], function-call: algebricks:ge, Args:[%0->$$14, 20.0]], function-call: algebricks:le, Args:[%0->$$14, 30.0]], function-call: algebricks:ge, Args:[%0->$$6, 1]], function-call: algebricks:le, Args:[%0->$$6, 15]], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFRegExp, Args:[%0->$$24, AIR||AIR REG]], function-call: algebricks:eq, Args:[%0->$$23, DELIVER IN PERSON]]])
               -- STREAM_SELECT  |UNPARTITIONED|
                 exchange 
                 -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q20_potential_part_promotion.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q20_potential_part_promotion.plan
index eddfca5..cebc0eb 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q20_potential_part_promotion.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q20_potential_part_promotion.plan
@@ -50,7 +50,7 @@
               -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                 project ([$$2, $$3, $$5])
                 -- STREAM_PROJECT  |PARTITIONED|
-                  select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$11, 1994-01-01], function-call: algebricks:lt, Args:[%0->$$11, 1995-01-01], function-call: algebricks:ge, Args:[%0->$$11, 1994-01-01], function-call: algebricks:lt, Args:[%0->$$11, 1995-01-01]])
+                  select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$11, 1994-01-01], function-call: algebricks:lt, Args:[%0->$$11, 1995-01-01]])
                   -- STREAM_SELECT  |PARTITIONED|
                     exchange 
                     -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q21_suppliers_who_kept_orders_waiting.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q21_suppliers_who_kept_orders_waiting.plan
index cc47cf3..fd20869 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q21_suppliers_who_kept_orders_waiting.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q21_suppliers_who_kept_orders_waiting.plan
@@ -150,9 +150,9 @@
                                                             -- HYBRID_HASH_JOIN [$$18][$$36]  |PARTITIONED|
                                                               exchange 
                                                               -- HASH_PARTITION_EXCHANGE [$$18]  |PARTITIONED|
-                                                                project ([$$16, $$18])
+                                                                project ([$$18, $$16])
                                                                 -- STREAM_PROJECT  |PARTITIONED|
-                                                                  select (function-call: algebricks:and, Args:[function-call: algebricks:gt, Args:[%0->$$28, %0->$$27], function-call: algebricks:gt, Args:[%0->$$28, %0->$$27]])
+                                                                  select (function-call: algebricks:gt, Args:[%0->$$28, %0->$$27])
                                                                   -- STREAM_SELECT  |PARTITIONED|
                                                                     exchange 
                                                                     -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q2_minimum_cost_supplier.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q2_minimum_cost_supplier.plan
index 151f34d..1698365 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q2_minimum_cost_supplier.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q2_minimum_cost_supplier.plan
@@ -10,7 +10,7 @@
         -- HASH_PARTITION_EXCHANGE [$$1]  |PARTITIONED|
           project ([$$1, $$3])
           -- STREAM_PROJECT  |PARTITIONED|
-            select (function-call: algebricks:and, Args:[function-call: hive:org.apache.hadoop.hive.ql.udf.UDFLike, Args:[%0->$$5, %BRASS], function-call: algebricks:eq, Args:[%0->$$6, 15], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFLike, Args:[%0->$$5, %BRASS]])
+            select (function-call: algebricks:and, Args:[function-call: algebricks:eq, Args:[%0->$$6, 15], function-call: hive:org.apache.hadoop.hive.ql.udf.UDFLike, Args:[%0->$$5, %BRASS]])
             -- STREAM_SELECT  |PARTITIONED|
               exchange 
               -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q4_order_priority.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q4_order_priority.plan
index 435fd7c..6929f74 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q4_order_priority.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q4_order_priority.plan
@@ -70,7 +70,7 @@
                           -- HASH_PARTITION_EXCHANGE [$$2]  |PARTITIONED|
                             project ([$$2, $$7])
                             -- STREAM_PROJECT  |PARTITIONED|
-                              select (function-call: algebricks:and, Args:[function-call: algebricks:lt, Args:[%0->$$6, 1993-10-01], function-call: algebricks:ge, Args:[%0->$$6, 1993-07-01], function-call: algebricks:lt, Args:[%0->$$6, 1993-10-01]])
+                              select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$6, 1993-07-01], function-call: algebricks:lt, Args:[%0->$$6, 1993-10-01]])
                               -- STREAM_SELECT  |PARTITIONED|
                                 exchange 
                                 -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q5_local_supplier_volume.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q5_local_supplier_volume.plan
index 177d24c..3161a61 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q5_local_supplier_volume.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q5_local_supplier_volume.plan
@@ -106,7 +106,7 @@
                                 -- HASH_PARTITION_EXCHANGE [$$9]  |PARTITIONED|
                                   project ([$$9, $$10])
                                   -- STREAM_PROJECT  |PARTITIONED|
-                                    select (function-call: algebricks:and, Args:[function-call: algebricks:lt, Args:[%0->$$13, 1995-01-01], function-call: algebricks:ge, Args:[%0->$$13, 1994-01-01], function-call: algebricks:lt, Args:[%0->$$13, 1995-01-01]])
+                                    select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$13, 1994-01-01], function-call: algebricks:lt, Args:[%0->$$13, 1995-01-01]])
                                     -- STREAM_SELECT  |PARTITIONED|
                                       exchange 
                                       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q6_forecast_revenue_change.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q6_forecast_revenue_change.plan
index cd9ffcd..92deaea 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q6_forecast_revenue_change.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q6_forecast_revenue_change.plan
@@ -22,7 +22,7 @@
           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
             project ([$$6, $$7])
             -- STREAM_PROJECT  |PARTITIONED|
-              select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$11, 1994-01-01], function-call: algebricks:lt, Args:[%0->$$11, 1995-01-01], function-call: algebricks:ge, Args:[%0->$$7, 0.05], function-call: algebricks:le, Args:[%0->$$7, 0.07], function-call: algebricks:lt, Args:[%0->$$5, 24], function-call: algebricks:ge, Args:[%0->$$11, 1994-01-01], function-call: algebricks:lt, Args:[%0->$$11, 1995-01-01], function-call: algebricks:ge, Args:[%0->$$7, 0.05], function-call: algebricks:le, Args:[%0->$$7, 0.07], function-call: algebricks:lt, Args:[%0->$$5, 24]])
+              select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$11, 1994-01-01], function-call: algebricks:lt, Args:[%0->$$11, 1995-01-01], function-call: algebricks:ge, Args:[%0->$$7, 0.05], function-call: algebricks:le, Args:[%0->$$7, 0.07], function-call: algebricks:lt, Args:[%0->$$5, 24.0]])
               -- STREAM_SELECT  |PARTITIONED|
                 exchange 
                 -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q7_volume_shipping.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q7_volume_shipping.plan
index 39f8301..c3081a5 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q7_volume_shipping.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q7_volume_shipping.plan
@@ -148,7 +148,7 @@
                                                   -- HYBRID_HASH_JOIN [$$20][$$36]  |PARTITIONED|
                                                     exchange 
                                                     -- HASH_PARTITION_EXCHANGE [$$20]  |PARTITIONED|
-                                                      select (function-call: algebricks:and, Args:[function-call: algebricks:le, Args:[%0->$$30, 1996-12-31], function-call: algebricks:ge, Args:[%0->$$30, 1995-01-01], function-call: algebricks:le, Args:[%0->$$30, 1996-12-31]])
+                                                      select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$30, 1995-01-01], function-call: algebricks:le, Args:[%0->$$30, 1996-12-31]])
                                                       -- STREAM_SELECT  |PARTITIONED|
                                                         exchange 
                                                         -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q8_national_market_share.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q8_national_market_share.plan
index b807a24..6b1ea41 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q8_national_market_share.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/q8_national_market_share.plan
@@ -138,7 +138,7 @@
                                                                 -- HASH_PARTITION_EXCHANGE [$$38]  |PARTITIONED|
                                                                   project ([$$38, $$37, $$41])
                                                                   -- STREAM_PROJECT  |PARTITIONED|
-                                                                    select (function-call: algebricks:and, Args:[function-call: algebricks:lt, Args:[%0->$$41, 1996-12-31], function-call: algebricks:ge, Args:[%0->$$41, 1995-01-01]])
+                                                                    select (function-call: algebricks:and, Args:[function-call: algebricks:ge, Args:[%0->$$41, 1995-01-01], function-call: algebricks:lt, Args:[%0->$$41, 1996-12-31]])
                                                                     -- STREAM_SELECT  |PARTITIONED|
                                                                       exchange 
                                                                       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u5_lateral_view.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u5_lateral_view.plan
index 48e624e..2cbea4a 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u5_lateral_view.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u5_lateral_view.plan
@@ -6,7 +6,7 @@
     -- UNNEST  |PARTITIONED|
       exchange 
       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-        data-scan [$$1, $$2, $$3]<-[$$1, $$2, $$3, $$4, $$5, $$6, $$7] <- default.supplier
+        data-scan [$$2, $$3, $$1]<-[$$1, $$2, $$3, $$4, $$5, $$6, $$7] <- default.supplier
         -- DATASOURCE_SCAN  |PARTITIONED|
           exchange 
           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u6_limit.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u6_limit.plan
index b5ed12f..1fb6117 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u6_limit.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u6_limit.plan
@@ -14,7 +14,7 @@
             -- STABLE_SORT [$$4(ASC)]  |LOCAL|
               exchange 
               -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                select (function-call: algebricks:lt, Args:[%0->$$4, 10000])
+                select (function-call: algebricks:lt, Args:[%0->$$4, 10000.0])
                 -- STREAM_SELECT  |PARTITIONED|
                   exchange 
                   -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
diff --git a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u7_multi_join.plan b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u7_multi_join.plan
index ab55181..b5f1dc2 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u7_multi_join.plan
+++ b/hivesterix/hivesterix-dist/src/test/resources/optimizerts/results/u7_multi_join.plan
@@ -16,37 +16,35 @@
               -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
         exchange 
         -- HASH_PARTITION_EXCHANGE [$$25]  |PARTITIONED|
-          project ([$$32, $$25, $$29, $$28])
+          project ([$$25, $$28, $$29, $$32])
           -- STREAM_PROJECT  |PARTITIONED|
-            project ([$$25, $$17, $$28, $$29, $$32])
-            -- STREAM_PROJECT  |PARTITIONED|
-              exchange 
-              -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                join (function-call: algebricks:eq, Args:[%0->$$26, %0->$$17])
-                -- HYBRID_HASH_JOIN [$$26][$$17]  |PARTITIONED|
-                  exchange 
-                  -- HASH_PARTITION_EXCHANGE [$$26]  |PARTITIONED|
-                    select (function-call: algebricks:and, Args:[function-call: algebricks:lt, Args:[%0->$$28, 30000], function-call: algebricks:lt, Args:[%0->$$28, 30000]])
+            exchange 
+            -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+              join (function-call: algebricks:eq, Args:[%0->$$26, %0->$$17])
+              -- HYBRID_HASH_JOIN [$$26][$$17]  |PARTITIONED|
+                exchange 
+                -- HASH_PARTITION_EXCHANGE [$$26]  |PARTITIONED|
+                  select (function-call: algebricks:and, Args:[function-call: algebricks:lt, Args:[%0->$$28, 30000.0], function-call: algebricks:lt, Args:[%0->$$26, 5]])
+                  -- STREAM_SELECT  |PARTITIONED|
+                    exchange 
+                    -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                      data-scan [$$32, $$25, $$26, $$29, $$28]<-[$$25, $$26, $$27, $$28, $$29, $$30, $$31, $$32, $$33] <- default.orders
+                      -- DATASOURCE_SCAN  |PARTITIONED|
+                        exchange 
+                        -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                          empty-tuple-source
+                          -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                exchange 
+                -- HASH_PARTITION_EXCHANGE [$$17]  |PARTITIONED|
+                  project ([$$17])
+                  -- STREAM_PROJECT  |PARTITIONED|
+                    select (function-call: algebricks:lt, Args:[%0->$$17, 5])
                     -- STREAM_SELECT  |PARTITIONED|
                       exchange 
                       -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                        data-scan [$$32, $$25, $$26, $$29, $$28]<-[$$25, $$26, $$27, $$28, $$29, $$30, $$31, $$32, $$33] <- default.orders
+                        data-scan [$$17]<-[$$17, $$18, $$19, $$20, $$21, $$22, $$23, $$24] <- default.customer
                         -- DATASOURCE_SCAN  |PARTITIONED|
                           exchange 
                           -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                             empty-tuple-source
-                            -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
-                  exchange 
-                  -- HASH_PARTITION_EXCHANGE [$$17]  |PARTITIONED|
-                    project ([$$17])
-                    -- STREAM_PROJECT  |PARTITIONED|
-                      select (function-call: algebricks:and, Args:[function-call: algebricks:lt, Args:[%0->$$17, 5], function-call: algebricks:lt, Args:[%0->$$17, 5]])
-                      -- STREAM_SELECT  |PARTITIONED|
-                        exchange 
-                        -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                          data-scan [$$17]<-[$$17, $$18, $$19, $$20, $$21, $$22, $$23, $$24] <- default.customer
-                          -- DATASOURCE_SCAN  |PARTITIONED|
-                            exchange 
-                            -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
-                              empty-tuple-source
-                              -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
+                            -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
\ No newline at end of file
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/hive/conf/hive-default.xml b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/hive/conf/hive-default.xml
index a4ee677..c726bfa 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/hive/conf/hive-default.xml
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/hive/conf/hive-default.xml
@@ -42,6 +42,20 @@
 	</property>
 
 	<property>
+  		<name>hive.auto.convert.join.noconditionaltask</name>
+  		<value>false</value>
+  		<description>Whether Hive enable the optimization about converting common join into mapjoin based on the input file
+    		size. If this paramater is on, and the sum of size for n-1 of the tables/partitions for a n-way join is smaller than the
+    		specified size, the join is directly converted to a mapjoin (there is no conditional task).
+  		</description>
+	</property>
+
+	<property>
+       <name>hive.auto.convert.join</name>
+        <value>false</value>
+    </property>
+
+	<property>
 		<name>hive.hyracks.connectorpolicy</name>
 		<value>SEND_SIDE_MAT_PIPELINING</value>
 	</property>
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/logging.properties b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/logging.properties
index a7d8d9c..f886a44 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/logging.properties
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/logging.properties
@@ -43,7 +43,7 @@
 # Note that the ConsoleHandler also has a separate level
 # setting to limit messages printed to the console.
 
-.level= WARNING
+.level= INFO
 # .level= INFO
 # .level= FINE
 # .level = FINEST
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q10_returned_item.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q10_returned_item.hive
index 3f1214a..bb07665 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q10_returned_item.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q10_returned_item.hive
@@ -13,9 +13,6 @@
 -- create the result table
 create table q10_returned_item (c_custkey int, c_name string, revenue double, c_acctbal string, n_name string, c_address string, c_phone string, c_comment string);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1024000000;
-
 -- the query
 insert overwrite table q10_returned_item
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q12_shipping.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q12_shipping.hive
index 062f7b9..8546365 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q12_shipping.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q12_shipping.hive
@@ -9,9 +9,6 @@
 -- create the result table
 create table q12_shipping(l_shipmode string, high_line_count double, low_line_count double);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1225000000;
-
 -- the query
 insert overwrite table q12_shipping
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q14_promotion_effect.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q14_promotion_effect.hive
index 988f400..4644d23 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q14_promotion_effect.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q14_promotion_effect.hive
@@ -9,9 +9,6 @@
 -- create the result table
 create table q14_promotion_effect(promo_revenue double);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1040000000;
-
 -- the query
 insert overwrite table q14_promotion_effect
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q15_top_supplier.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q15_top_supplier.hive
index 04064ed..8fa333e 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q15_top_supplier.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q15_top_supplier.hive
@@ -14,8 +14,6 @@
 create table q15_top_supplier(s_suppkey int, s_name string, s_address string, s_phone string, total_revenue double);
 
 
-set mapred.min.split.size=536870912;
-
 -- the query
 insert overwrite table revenue
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q18_large_volume_customer.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q18_large_volume_customer.hive
index ac2902c..d1eaacc 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q18_large_volume_customer.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q18_large_volume_customer.hive
@@ -13,9 +13,6 @@
 create table q18_tmp(l_orderkey int, t_sum_quantity double);
 create table q18_large_volume_customer(c_name string, c_custkey int, o_orderkey int, o_orderdate string, o_totalprice double, sum_quantity double);
 
-set mapred.min.split.size=268435456;
-set hive.exec.reducers.bytes.per.reducer=1164000000;
-
 -- the query
 insert overwrite table q18_tmp
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q19_discounted_revenue.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q19_discounted_revenue.hive
index 2002e1e..6badfcf 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q19_discounted_revenue.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q19_discounted_revenue.hive
@@ -9,9 +9,6 @@
 -- create the result table
 create table q19_discounted_revenue(revenue double);
 
-set mapred.min.split.size=268435456;
-set hive.exec.reducers.bytes.per.reducer=1040000000;
-
 -- the query
 insert overwrite table q19_discounted_revenue
 select
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q1_pricing_summary_report.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q1_pricing_summary_report.hive
index a002068..af64a4f 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q1_pricing_summary_report.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q1_pricing_summary_report.hive
@@ -7,8 +7,6 @@
 -- create the target table
 CREATE TABLE q1_pricing_summary_report ( L_RETURNFLAG STRING, L_LINESTATUS STRING, SUM_QTY DOUBLE, SUM_BASE_PRICE DOUBLE, SUM_DISC_PRICE DOUBLE, SUM_CHARGE DOUBLE, AVE_QTY DOUBLE, AVE_PRICE DOUBLE, AVE_DISC DOUBLE, COUNT_ORDER INT);
 
-set mapred.min.split.size=536870912;
-
 -- the query
 INSERT OVERWRITE TABLE q1_pricing_summary_report 
 SELECT 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q20_potential_part_promotion.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q20_potential_part_promotion.hive
index 2bb90ea..32181bf 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q20_potential_part_promotion.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q20_potential_part_promotion.hive
@@ -23,8 +23,6 @@
 create table q20_tmp4(ps_suppkey int);
 create table q20_potential_part_promotion(s_name string, s_address string);
 
-set mapred.min.split.size=536870912;
-
 -- the query
 insert overwrite table q20_tmp1
 select distinct p_partkey
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q3_shipping_priority.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q3_shipping_priority.hive
index 0049eb3..67f6dc4 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q3_shipping_priority.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q3_shipping_priority.hive
@@ -11,9 +11,6 @@
 -- create the target table
 create table q3_shipping_priority (l_orderkey int, revenue double, o_orderdate string, o_shippriority int);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1024000000;
-
 -- the query
 Insert overwrite table q3_shipping_priority 
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q4_order_priority.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q4_order_priority.hive
index aa828e9..efbcff2 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q4_order_priority.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q4_order_priority.hive
@@ -11,7 +11,6 @@
 CREATE TABLE q4_order_priority_tmp (O_ORDERKEY INT);
 CREATE TABLE q4_order_priority (O_ORDERPRIORITY STRING, ORDER_COUNT INT);
 
-set mapred.min.split.size=536870912;
 -- the query
 INSERT OVERWRITE TABLE q4_order_priority_tmp 
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q5_local_supplier_volume.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q5_local_supplier_volume.hive
index 9af2dd2..838a1e8 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q5_local_supplier_volume.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q5_local_supplier_volume.hive
@@ -17,7 +17,6 @@
 -- create the target table
 create table q5_local_supplier_volume (N_NAME STRING, REVENUE DOUBLE);
 
-set mapred.min.split.size=536870912;
 
 -- the query
 insert overwrite table q5_local_supplier_volume 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q7_volume_shipping.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q7_volume_shipping.hive
index 2678f80..12ae8ae 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q7_volume_shipping.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q7_volume_shipping.hive
@@ -17,9 +17,6 @@
 create table q7_volume_shipping (supp_nation string, cust_nation string, l_year int, revenue double);
 create table q7_volume_shipping_tmp(supp_nation string, cust_nation string, s_nationkey int, c_nationkey int);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1225000000;
-
 -- the query
 insert overwrite table q7_volume_shipping_tmp
 select 
diff --git a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q9_product_type_profit.hive b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q9_product_type_profit.hive
index 2e5b4a1..c491997 100644
--- a/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q9_product_type_profit.hive
+++ b/hivesterix/hivesterix-dist/src/test/resources/runtimefunctionts/queries/q9_product_type_profit.hive
@@ -17,9 +17,6 @@
 -- create the result table
 create table q9_product_type_profit (nation string, o_year string, sum_profit double);
 
-set mapred.min.split.size=536870912;
-set hive.exec.reducers.bytes.per.reducer=1024000000;
-
 -- the query
 insert overwrite table q9_product_type_profit
 select 
diff --git a/hivesterix/hivesterix-runtime/pom.xml b/hivesterix/hivesterix-runtime/pom.xml
index e4f5416..6d075ba 100644
--- a/hivesterix/hivesterix-runtime/pom.xml
+++ b/hivesterix/hivesterix-runtime/pom.xml
@@ -24,12 +24,10 @@
         </parent>
 
 	<dependencies>
-        <dependency>
-			<groupId>javax.servlet</groupId>
-			<artifactId>servlet-api</artifactId>
-			<version>2.5</version>
-			<type>jar</type>
-			<scope>compile</scope>
+		<dependency>
+  			<groupId>sqlline</groupId>
+  			<artifactId>sqlline</artifactId>
+  			<version>1_0_2</version>
 		</dependency>
 		<dependency>
 			<groupId>junit</groupId>
@@ -38,250 +36,65 @@
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>args4j</groupId>
-			<artifactId>args4j</artifactId>
-			<version>2.0.12</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.json</groupId>
-			<artifactId>json</artifactId>
-			<version>20090211</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.eclipse.jetty</groupId>
-			<artifactId>jetty-server</artifactId>
-			<version>8.0.0.M1</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.eclipse.jetty</groupId>
-			<artifactId>jetty-servlet</artifactId>
-			<version>8.0.0.M1</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>jline</groupId>
-			<artifactId>jline</artifactId>
-			<version>0.9.94</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.datanucleus</groupId>
-			<artifactId>datanucleus-core</artifactId>
-			<version>2.0.3</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.datanucleus</groupId>
-			<artifactId>datanucleus-connectionpool</artifactId>
-			<version>2.0.3</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.datanucleus</groupId>
-			<artifactId>datanucleus-enhancer</artifactId>
-			<version>2.0.3</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.datanucleus</groupId>
-			<artifactId>datanucleus-rdbms</artifactId>
-			<version>2.0.3</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-dbcp</groupId>
-			<artifactId>commons-dbcp</artifactId>
-			<version>1.4</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-pool</groupId>
-			<artifactId>commons-pool</artifactId>
-			<version>1.5.4</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-collections</groupId>
-			<artifactId>commons-collections</artifactId>
-			<version>3.2.1</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-lang</groupId>
-			<artifactId>commons-lang</artifactId>
-			<version>2.4</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>javax</groupId>
-			<artifactId>jdo2-api</artifactId>
-			<version>2.3-ec</version>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>com.facebook</groupId>
-			<artifactId>libfb303</artifactId>
-			<version>0.5.0</version>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.thrift</groupId>
-			<artifactId>libthrift</artifactId>
-			<version>0.5.0</version>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.commons</groupId>
-			<artifactId>cli</artifactId>
-			<version>1.2</version>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache</groupId>
-			<artifactId>log4j</artifactId>
-			<version>1.2.15</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.antlr</groupId>
-			<artifactId>antlr-runtime</artifactId>
-			<version>3.0.1</version>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-cli</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-common</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-exec</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-hwi</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-jdbc</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-metastore</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-service</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-shims</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-serde</artifactId>
-			<version>0.7.0</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.slf4j</groupId>
-			<artifactId>slf4j-api</artifactId>
-			<version>1.6.1</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-cli</groupId>
-			<artifactId>commons-cli</artifactId>
-			<version>1.2</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.slf4j</groupId>
-			<artifactId>slf4j-log4j12</artifactId>
-			<version>1.6.1</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>commons-logging</groupId>
-			<artifactId>commons-logging</artifactId>
-			<version>1.1.1</version>
-			<type>jar</type>
-			<classifier>api</classifier>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>com.google.guava</groupId>
-			<artifactId>guava</artifactId>
-			<version>r06</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.antlr</groupId>
-			<artifactId>stringtemplate</artifactId>
-			<version>3.2</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.derby</groupId>
-			<artifactId>derby</artifactId>
-			<version>10.8.1.2</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.hbase</groupId>
-			<artifactId>hbase</artifactId>
-			<version>0.90.3</version>
+			<version>0.11.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
@@ -384,5 +197,19 @@
 			<id>hyracks-public-release</id>
 			<url>http://obelix.ics.uci.edu/nexus/content/repositories/hyracks-public-releases</url>
 		</repository>
+		<repository>
+			<releases>
+				<enabled>true</enabled>
+				<updatePolicy>always</updatePolicy>
+				<checksumPolicy>warn</checksumPolicy>
+			</releases>
+			<snapshots>
+				<enabled>true</enabled>
+				<updatePolicy>always</updatePolicy>
+				<checksumPolicy>fail</checksumPolicy>
+			</snapshots>
+			<id>plugins-release</id>
+			<url>http://repo.springsource.org/plugins-release</url>
+		</repository>
 	</repositories>
 </project>
diff --git a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AbstractExpressionEvaluator.java b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AbstractExpressionEvaluator.java
index a5177c9..dd4fbe7 100644
--- a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AbstractExpressionEvaluator.java
+++ b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AbstractExpressionEvaluator.java
@@ -34,6 +34,7 @@
 import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
 
+@SuppressWarnings("deprecation")
 public abstract class AbstractExpressionEvaluator implements ICopyEvaluator {
 
     private List<ICopyEvaluator> children;
diff --git a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AggregationFunctionEvaluator.java b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AggregationFunctionEvaluator.java
index d061b23..87d2221 100644
--- a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AggregationFunctionEvaluator.java
+++ b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AggregationFunctionEvaluator.java
@@ -36,6 +36,7 @@
 import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyAggregateFunction;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
 
+@SuppressWarnings("deprecation")
 public class AggregationFunctionEvaluator implements ICopyAggregateFunction {
 
     /**
diff --git a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AggregatuibFunctionSerializableEvaluator.java b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AggregatuibFunctionSerializableEvaluator.java
index f4b77b8..3f1cc27 100644
--- a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AggregatuibFunctionSerializableEvaluator.java
+++ b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/AggregatuibFunctionSerializableEvaluator.java
@@ -35,6 +35,7 @@
 import edu.uci.ics.hyracks.algebricks.runtime.base.ICopySerializableAggregateFunction;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
 
+@SuppressWarnings("deprecation")
 public class AggregatuibFunctionSerializableEvaluator implements ICopySerializableAggregateFunction {
 
     /**
diff --git a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/UDTFFunctionEvaluator.java b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/UDTFFunctionEvaluator.java
index d91b806..b511d87 100644
--- a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/UDTFFunctionEvaluator.java
+++ b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/evaluator/UDTFFunctionEvaluator.java
@@ -35,6 +35,7 @@
 import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyUnnestingFunction;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
 
+@SuppressWarnings("deprecation")
 public class UDTFFunctionEvaluator implements ICopyUnnestingFunction, Collector {
 
     /**
diff --git a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/factory/evaluator/AggregationFunctionFactory.java b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/factory/evaluator/AggregationFunctionFactory.java
index 09f0cb6..d65dc24 100644
--- a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/factory/evaluator/AggregationFunctionFactory.java
+++ b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/factory/evaluator/AggregationFunctionFactory.java
@@ -12,370 +12,383 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.hivesterix.runtime.factory.evaluator;
-
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-
-import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hive.ql.exec.ExprNodeEvaluator;
-import org.apache.hadoop.hive.ql.exec.ExprNodeEvaluatorFactory;
-import org.apache.hadoop.hive.ql.exec.FunctionRegistry;
-import org.apache.hadoop.hive.ql.exec.Utilities;
-import org.apache.hadoop.hive.ql.metadata.HiveException;
-import org.apache.hadoop.hive.ql.plan.AggregationDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
-import org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator;
-import org.apache.hadoop.hive.serde2.SerDe;
-import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
-import org.apache.hadoop.hive.serde2.typeinfo.StructTypeInfo;
-import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
-import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
-
-import edu.uci.ics.hivesterix.logical.expression.ExpressionTranslator;
-import edu.uci.ics.hivesterix.runtime.evaluator.AggregationFunctionEvaluator;
-import edu.uci.ics.hivesterix.runtime.jobgen.Schema;
-import edu.uci.ics.hivesterix.serde.lazy.LazyFactory;
-import edu.uci.ics.hivesterix.serde.lazy.LazyObject;
-import edu.uci.ics.hivesterix.serde.lazy.LazySerDe;
-import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AggregateFunctionCallExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment;
-import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyAggregateFunction;
-import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyAggregateFunctionFactory;
-import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
-
-public class AggregationFunctionFactory implements ICopyAggregateFunctionFactory {
-
-    private static final long serialVersionUID = 1L;
-
-    /**
-     * list of parameters' serialization
-     */
-    private List<String> parametersSerialization = new ArrayList<String>();
-
-    /**
-     * the name of the udf
-     */
-    private String genericUDAFName;
-
-    /**
-     * aggregation mode
-     */
-    private GenericUDAFEvaluator.Mode mode;
-
-    /**
-     * list of type info
-     */
-    private List<TypeInfo> types = new ArrayList<TypeInfo>();
-
-    /**
-     * distinct or not
-     */
-    private boolean distinct;
-
-    /**
-     * the schema of incoming rows
-     */
-    private Schema rowSchema;
-
-    /**
-     * list of parameters
-     */
-    private transient List<ExprNodeDesc> parametersOrigin;
-
-    /**
-     * row inspector
-     */
-    private transient ObjectInspector rowInspector = null;
-
-    /**
-     * output object inspector
-     */
-    private transient ObjectInspector outputInspector = null;
-
-    /**
-     * output object inspector
-     */
-    private transient ObjectInspector outputInspectorPartial = null;
-
-    /**
-     * parameter inspectors
-     */
-    private transient ObjectInspector[] parameterInspectors = null;
-
-    /**
-     * expression desc
-     */
-    private transient HashMap<Long, List<ExprNodeDesc>> parameterExprs = new HashMap<Long, List<ExprNodeDesc>>();
-
-    /**
-     * evaluators
-     */
-    private transient HashMap<Long, ExprNodeEvaluator[]> evaluators = new HashMap<Long, ExprNodeEvaluator[]>();
-
-    /**
-     * cached parameter objects
-     */
-    private transient HashMap<Long, Object[]> cachedParameters = new HashMap<Long, Object[]>();
-
-    /**
-     * cached row object: one per thread
-     */
-    private transient HashMap<Long, LazyObject<? extends ObjectInspector>> cachedRowObjects = new HashMap<Long, LazyObject<? extends ObjectInspector>>();
-
-    /**
-     * we only use lazy serde to do serialization
-     */
-    private transient HashMap<Long, SerDe> serDe = new HashMap<Long, SerDe>();
-
-    /**
-     * udaf evaluators
-     */
-    private transient HashMap<Long, GenericUDAFEvaluator> udafsPartial = new HashMap<Long, GenericUDAFEvaluator>();
-
-    /**
-     * udaf evaluators
-     */
-    private transient HashMap<Long, GenericUDAFEvaluator> udafsComplete = new HashMap<Long, GenericUDAFEvaluator>();
-
-    /**
-     * aggregation function desc
-     */
-    private transient AggregationDesc aggregator;
-
-    /**
-     * @param aggregator
-     *            Algebricks function call expression
-     * @param oi
-     *            schema
-     */
-    public AggregationFunctionFactory(AggregateFunctionCallExpression expression, Schema oi,
-            IVariableTypeEnvironment env) throws AlgebricksException {
-
-        try {
-            aggregator = (AggregationDesc) ExpressionTranslator.getHiveExpression(expression, env);
-        } catch (Exception e) {
-            e.printStackTrace();
-            throw new AlgebricksException(e.getMessage());
-        }
-        init(aggregator.getParameters(), aggregator.getGenericUDAFName(), aggregator.getMode(),
-                aggregator.getDistinct(), oi);
-    }
-
-    /**
-     * constructor of aggregation function factory
-     * 
-     * @param inputs
-     * @param name
-     * @param udafMode
-     * @param distinct
-     * @param oi
-     */
-    private void init(List<ExprNodeDesc> inputs, String name, GenericUDAFEvaluator.Mode udafMode, boolean distinct,
-            Schema oi) {
-        parametersOrigin = inputs;
-        genericUDAFName = name;
-        mode = udafMode;
-        this.distinct = distinct;
-        rowSchema = oi;
-
-        for (ExprNodeDesc input : inputs) {
-            TypeInfo type = input.getTypeInfo();
-            if (type instanceof StructTypeInfo) {
-                types.add(TypeInfoFactory.doubleTypeInfo);
-            } else
-                types.add(type);
-
-            String s = Utilities.serializeExpression(input);
-            parametersSerialization.add(s);
-        }
-    }
-
-    @Override
-    public synchronized ICopyAggregateFunction createAggregateFunction(IDataOutputProvider provider)
-            throws AlgebricksException {
-        if (parametersOrigin == null) {
-            Configuration config = new Configuration();
-            config.setClassLoader(this.getClass().getClassLoader());
-            /**
-             * in case of class.forname(...) call in hive code
-             */
-            Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader());
-
-            parametersOrigin = new ArrayList<ExprNodeDesc>();
-            for (String serialization : parametersSerialization) {
-                parametersOrigin.add(Utilities.deserializeExpression(serialization, config));
-            }
-        }
-
-        /**
-         * exprs
-         */
-        if (parameterExprs == null)
-            parameterExprs = new HashMap<Long, List<ExprNodeDesc>>();
-
-        /**
-         * evaluators
-         */
-        if (evaluators == null)
-            evaluators = new HashMap<Long, ExprNodeEvaluator[]>();
-
-        /**
-         * cached parameter objects
-         */
-        if (cachedParameters == null)
-            cachedParameters = new HashMap<Long, Object[]>();
-
-        /**
-         * cached row object: one per thread
-         */
-        if (cachedRowObjects == null)
-            cachedRowObjects = new HashMap<Long, LazyObject<? extends ObjectInspector>>();
-
-        /**
-         * we only use lazy serde to do serialization
-         */
-        if (serDe == null)
-            serDe = new HashMap<Long, SerDe>();
-
-        /**
-         * UDAF functions
-         */
-        if (udafsComplete == null)
-            udafsComplete = new HashMap<Long, GenericUDAFEvaluator>();
-
-        /**
-         * UDAF functions
-         */
-        if (udafsPartial == null)
-            udafsPartial = new HashMap<Long, GenericUDAFEvaluator>();
-
-        if (parameterInspectors == null)
-            parameterInspectors = new ObjectInspector[parametersOrigin.size()];
-
-        if (rowInspector == null)
-            rowInspector = rowSchema.toObjectInspector();
-
-        // get current thread id
-        long threadId = Thread.currentThread().getId();
-
-        /**
-         * expressions, expressions are thread local
-         */
-        List<ExprNodeDesc> parameters = parameterExprs.get(threadId);
-        if (parameters == null) {
-            parameters = new ArrayList<ExprNodeDesc>();
-            for (ExprNodeDesc parameter : parametersOrigin)
-                parameters.add(parameter.clone());
-            parameterExprs.put(threadId, parameters);
-        }
-
-        /**
-         * cached parameter objects
-         */
-        Object[] cachedParas = cachedParameters.get(threadId);
-        if (cachedParas == null) {
-            cachedParas = new Object[parameters.size()];
-            cachedParameters.put(threadId, cachedParas);
-        }
-
-        /**
-         * cached row object: one per thread
-         */
-        LazyObject<? extends ObjectInspector> cachedRowObject = cachedRowObjects.get(threadId);
-        if (cachedRowObject == null) {
-            cachedRowObject = LazyFactory.createLazyObject(rowInspector);
-            cachedRowObjects.put(threadId, cachedRowObject);
-        }
-
-        /**
-         * we only use lazy serde to do serialization
-         */
-        SerDe lazySer = serDe.get(threadId);
-        if (lazySer == null) {
-            lazySer = new LazySerDe();
-            serDe.put(threadId, lazySer);
-        }
-
-        /**
-         * evaluators
-         */
-        ExprNodeEvaluator[] evals = evaluators.get(threadId);
-        if (evals == null) {
-            evals = new ExprNodeEvaluator[parameters.size()];
-            evaluators.put(threadId, evals);
-        }
-
-        GenericUDAFEvaluator udafPartial;
-        GenericUDAFEvaluator udafComplete;
-
-        // initialize object inspectors
-        try {
-            /**
-             * evaluators, udf, object inpsectors are shared in one thread
-             */
-            for (int i = 0; i < evals.length; i++) {
-                if (evals[i] == null) {
-                    evals[i] = ExprNodeEvaluatorFactory.get(parameters.get(i));
-                    if (parameterInspectors[i] == null) {
-                        parameterInspectors[i] = evals[i].initialize(rowInspector);
-                    } else {
-                        evals[i].initialize(rowInspector);
-                    }
-                }
-            }
-
-            udafComplete = udafsComplete.get(threadId);
-            if (udafComplete == null) {
-                try {
-                    udafComplete = FunctionRegistry.getGenericUDAFEvaluator(genericUDAFName, types, distinct, false);
-                } catch (HiveException e) {
-                    throw new AlgebricksException(e);
-                }
-                udafsComplete.put(threadId, udafComplete);
-                udafComplete.init(mode, parameterInspectors);
-            }
-
-            // multiple stage group by, determined by the mode parameter
-            if (outputInspector == null)
-                outputInspector = udafComplete.init(mode, parameterInspectors);
-
-            // initial partial gby udaf
-            GenericUDAFEvaluator.Mode partialMode;
-            // adjust mode for external groupby
-            if (mode == GenericUDAFEvaluator.Mode.COMPLETE)
-                partialMode = GenericUDAFEvaluator.Mode.PARTIAL1;
-            else if (mode == GenericUDAFEvaluator.Mode.FINAL)
-                partialMode = GenericUDAFEvaluator.Mode.PARTIAL2;
-            else
-                partialMode = mode;
-            udafPartial = udafsPartial.get(threadId);
-            if (udafPartial == null) {
-                try {
-                    udafPartial = FunctionRegistry.getGenericUDAFEvaluator(genericUDAFName, types, distinct, false);
-                } catch (HiveException e) {
-                    throw new AlgebricksException(e);
-                }
-                udafPartial.init(partialMode, parameterInspectors);
-                udafsPartial.put(threadId, udafPartial);
-            }
-
-            // multiple stage group by, determined by the mode parameter
-            if (outputInspectorPartial == null)
-                outputInspectorPartial = udafPartial.init(partialMode, parameterInspectors);
-        } catch (Exception e) {
-            e.printStackTrace();
-            throw new AlgebricksException(e);
-        }
-
-        return new AggregationFunctionEvaluator(parameters, types, genericUDAFName, mode, distinct, rowInspector,
-                provider.getDataOutput(), evals, parameterInspectors, cachedParas, lazySer, cachedRowObject,
-                udafPartial, udafComplete, outputInspector, outputInspectorPartial);
-    }
-
-    public String toString() {
-        return "aggregation function expression evaluator factory: " + this.genericUDAFName;
-    }
-}
+package edu.uci.ics.hivesterix.runtime.factory.evaluator;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hive.ql.exec.ExprNodeEvaluator;
+import org.apache.hadoop.hive.ql.exec.ExprNodeEvaluatorFactory;
+import org.apache.hadoop.hive.ql.exec.FunctionRegistry;
+import org.apache.hadoop.hive.ql.exec.Utilities;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.hive.ql.plan.AggregationDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator;
+import org.apache.hadoop.hive.serde2.SerDe;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
+import org.apache.hadoop.hive.serde2.typeinfo.StructTypeInfo;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
+
+import edu.uci.ics.hivesterix.logical.expression.ExpressionTranslator;
+import edu.uci.ics.hivesterix.runtime.evaluator.AggregationFunctionEvaluator;
+import edu.uci.ics.hivesterix.runtime.jobgen.Schema;
+import edu.uci.ics.hivesterix.serde.lazy.LazyFactory;
+import edu.uci.ics.hivesterix.serde.lazy.LazyObject;
+import edu.uci.ics.hivesterix.serde.lazy.LazySerDe;
+import edu.uci.ics.hivesterix.serde.lazy.LazyUtils;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AggregateFunctionCallExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyAggregateFunction;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyAggregateFunctionFactory;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+
+@SuppressWarnings("deprecation")
+public class AggregationFunctionFactory implements ICopyAggregateFunctionFactory {
+
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * list of parameters' serialization
+     */
+    private List<String> parametersSerialization = new ArrayList<String>();
+
+    /**
+     * the name of the udf
+     */
+    private String genericUDAFName;
+
+    /**
+     * aggregation mode
+     */
+    private GenericUDAFEvaluator.Mode mode;
+
+    /**
+     * list of type info
+     */
+    private List<TypeInfo> types = new ArrayList<TypeInfo>();
+
+    /**
+     * distinct or not
+     */
+    private boolean distinct;
+
+    /**
+     * the schema of incoming rows
+     */
+    private Schema rowSchema;
+
+    /**
+     * list of parameters
+     */
+    private transient List<ExprNodeDesc> parametersOrigin;
+
+    /**
+     * row inspector
+     */
+    private transient ObjectInspector rowInspector = null;
+
+    /**
+     * output object inspector
+     */
+    private transient ObjectInspector outputInspector = null;
+
+    /**
+     * output object inspector
+     */
+    private transient ObjectInspector outputInspectorPartial = null;
+
+    /**
+     * parameter inspectors
+     */
+    private transient ObjectInspector[] parameterInspectors = null;
+
+    /**
+     * expression desc
+     */
+    private transient HashMap<Long, List<ExprNodeDesc>> parameterExprs = new HashMap<Long, List<ExprNodeDesc>>();
+
+    /**
+     * evaluators
+     */
+    private transient HashMap<Long, ExprNodeEvaluator[]> evaluators = new HashMap<Long, ExprNodeEvaluator[]>();
+
+    /**
+     * cached parameter objects
+     */
+    private transient HashMap<Long, Object[]> cachedParameters = new HashMap<Long, Object[]>();
+
+    /**
+     * cached row object: one per thread
+     */
+    private transient HashMap<Long, LazyObject<? extends ObjectInspector>> cachedRowObjects = new HashMap<Long, LazyObject<? extends ObjectInspector>>();
+
+    /**
+     * we only use lazy serde to do serialization
+     */
+    private transient HashMap<Long, SerDe> serDe = new HashMap<Long, SerDe>();
+
+    /**
+     * udaf evaluators
+     */
+    private transient HashMap<Long, GenericUDAFEvaluator> udafsPartial = new HashMap<Long, GenericUDAFEvaluator>();
+
+    /**
+     * udaf evaluators
+     */
+    private transient HashMap<Long, GenericUDAFEvaluator> udafsComplete = new HashMap<Long, GenericUDAFEvaluator>();
+
+    /**
+     * aggregation function desc
+     */
+    private transient AggregationDesc aggregator;
+
+    /**
+     * @param aggregator
+     *            Algebricks function call expression
+     * @param oi
+     *            schema
+     */
+    public AggregationFunctionFactory(AggregateFunctionCallExpression expression, Schema oi,
+            IVariableTypeEnvironment env) throws AlgebricksException {
+
+        try {
+            aggregator = (AggregationDesc) ExpressionTranslator.getHiveExpression(expression, env);
+        } catch (Exception e) {
+            e.printStackTrace();
+            throw new AlgebricksException(e.getMessage());
+        }
+        init(aggregator.getParameters(), aggregator.getGenericUDAFName(), aggregator.getMode(),
+                aggregator.getDistinct(), oi);
+    }
+
+    /**
+     * constructor of aggregation function factory
+     * 
+     * @param inputs
+     * @param name
+     * @param udafMode
+     * @param distinct
+     * @param oi
+     */
+    private void init(List<ExprNodeDesc> inputs, String name, GenericUDAFEvaluator.Mode udafMode, boolean distinct,
+            Schema oi) {
+        parametersOrigin = inputs;
+        genericUDAFName = name;
+        mode = udafMode;
+        this.distinct = distinct;
+        rowSchema = oi;
+
+        for (ExprNodeDesc input : inputs) {
+            TypeInfo type = input.getTypeInfo();
+            if (type instanceof StructTypeInfo) {
+                types.add(TypeInfoFactory.doubleTypeInfo);
+            } else {
+                types.add(type);
+            }
+
+            String s = Utilities.serializeExpression(input);
+            parametersSerialization.add(s);
+        }
+    }
+
+    @Override
+    public synchronized ICopyAggregateFunction createAggregateFunction(IDataOutputProvider provider)
+            throws AlgebricksException {
+        /**
+         * list of object inspectors correlated to types
+         */
+        List<ObjectInspector> oiListForTypes = new ArrayList<ObjectInspector>();
+        for (TypeInfo type : types) {
+            oiListForTypes.add(LazyUtils.getLazyObjectInspectorFromTypeInfo(type, false));
+        }
+
+        if (parametersOrigin == null) {
+            Configuration config = new Configuration();
+            config.setClassLoader(this.getClass().getClassLoader());
+            /**
+             * in case of class.forname(...) call in hive code
+             */
+            Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader());
+
+            parametersOrigin = new ArrayList<ExprNodeDesc>();
+            for (String serialization : parametersSerialization) {
+                parametersOrigin.add(Utilities.deserializeExpression(serialization, config));
+            }
+        }
+
+        /**
+         * exprs
+         */
+        if (parameterExprs == null)
+            parameterExprs = new HashMap<Long, List<ExprNodeDesc>>();
+
+        /**
+         * evaluators
+         */
+        if (evaluators == null)
+            evaluators = new HashMap<Long, ExprNodeEvaluator[]>();
+
+        /**
+         * cached parameter objects
+         */
+        if (cachedParameters == null)
+            cachedParameters = new HashMap<Long, Object[]>();
+
+        /**
+         * cached row object: one per thread
+         */
+        if (cachedRowObjects == null)
+            cachedRowObjects = new HashMap<Long, LazyObject<? extends ObjectInspector>>();
+
+        /**
+         * we only use lazy serde to do serialization
+         */
+        if (serDe == null)
+            serDe = new HashMap<Long, SerDe>();
+
+        /**
+         * UDAF functions
+         */
+        if (udafsComplete == null)
+            udafsComplete = new HashMap<Long, GenericUDAFEvaluator>();
+
+        /**
+         * UDAF functions
+         */
+        if (udafsPartial == null)
+            udafsPartial = new HashMap<Long, GenericUDAFEvaluator>();
+
+        if (parameterInspectors == null)
+            parameterInspectors = new ObjectInspector[parametersOrigin.size()];
+
+        if (rowInspector == null)
+            rowInspector = rowSchema.toObjectInspector();
+
+        // get current thread id
+        long threadId = Thread.currentThread().getId();
+
+        /**
+         * expressions, expressions are thread local
+         */
+        List<ExprNodeDesc> parameters = parameterExprs.get(threadId);
+        if (parameters == null) {
+            parameters = new ArrayList<ExprNodeDesc>();
+            for (ExprNodeDesc parameter : parametersOrigin)
+                parameters.add(parameter.clone());
+            parameterExprs.put(threadId, parameters);
+        }
+
+        /**
+         * cached parameter objects
+         */
+        Object[] cachedParas = cachedParameters.get(threadId);
+        if (cachedParas == null) {
+            cachedParas = new Object[parameters.size()];
+            cachedParameters.put(threadId, cachedParas);
+        }
+
+        /**
+         * cached row object: one per thread
+         */
+        LazyObject<? extends ObjectInspector> cachedRowObject = cachedRowObjects.get(threadId);
+        if (cachedRowObject == null) {
+            cachedRowObject = LazyFactory.createLazyObject(rowInspector);
+            cachedRowObjects.put(threadId, cachedRowObject);
+        }
+
+        /**
+         * we only use lazy serde to do serialization
+         */
+        SerDe lazySer = serDe.get(threadId);
+        if (lazySer == null) {
+            lazySer = new LazySerDe();
+            serDe.put(threadId, lazySer);
+        }
+
+        /**
+         * evaluators
+         */
+        ExprNodeEvaluator[] evals = evaluators.get(threadId);
+        if (evals == null) {
+            evals = new ExprNodeEvaluator[parameters.size()];
+            evaluators.put(threadId, evals);
+        }
+
+        GenericUDAFEvaluator udafPartial;
+        GenericUDAFEvaluator udafComplete;
+
+        // initialize object inspectors
+        try {
+            /**
+             * evaluators, udf, object inpsectors are shared in one thread
+             */
+            for (int i = 0; i < evals.length; i++) {
+                if (evals[i] == null) {
+                    evals[i] = ExprNodeEvaluatorFactory.get(parameters.get(i));
+                    if (parameterInspectors[i] == null) {
+                        parameterInspectors[i] = evals[i].initialize(rowInspector);
+                    } else {
+                        evals[i].initialize(rowInspector);
+                    }
+                }
+            }
+
+            udafComplete = udafsComplete.get(threadId);
+            if (udafComplete == null) {
+                try {
+                    udafComplete = FunctionRegistry.getGenericUDAFEvaluator(genericUDAFName, oiListForTypes, distinct,
+                            false);
+                } catch (HiveException e) {
+                    throw new AlgebricksException(e);
+                }
+                udafsComplete.put(threadId, udafComplete);
+                udafComplete.init(mode, parameterInspectors);
+            }
+
+            // multiple stage group by, determined by the mode parameter
+            if (outputInspector == null)
+                outputInspector = udafComplete.init(mode, parameterInspectors);
+
+            // initial partial gby udaf
+            GenericUDAFEvaluator.Mode partialMode;
+            // adjust mode for external groupby
+            if (mode == GenericUDAFEvaluator.Mode.COMPLETE)
+                partialMode = GenericUDAFEvaluator.Mode.PARTIAL1;
+            else if (mode == GenericUDAFEvaluator.Mode.FINAL)
+                partialMode = GenericUDAFEvaluator.Mode.PARTIAL2;
+            else
+                partialMode = mode;
+            udafPartial = udafsPartial.get(threadId);
+            if (udafPartial == null) {
+                try {
+                    udafPartial = FunctionRegistry.getGenericUDAFEvaluator(genericUDAFName, oiListForTypes, distinct,
+                            false);
+                } catch (HiveException e) {
+                    throw new AlgebricksException(e);
+                }
+                udafPartial.init(partialMode, parameterInspectors);
+                udafsPartial.put(threadId, udafPartial);
+            }
+
+            // multiple stage group by, determined by the mode parameter
+            if (outputInspectorPartial == null)
+                outputInspectorPartial = udafPartial.init(partialMode, parameterInspectors);
+        } catch (Exception e) {
+            e.printStackTrace();
+            throw new AlgebricksException(e);
+        }
+
+        return new AggregationFunctionEvaluator(parameters, types, genericUDAFName, mode, distinct, rowInspector,
+                provider.getDataOutput(), evals, parameterInspectors, cachedParas, lazySer, cachedRowObject,
+                udafPartial, udafComplete, outputInspector, outputInspectorPartial);
+    }
+
+    public String toString() {
+        return "aggregation function expression evaluator factory: " + this.genericUDAFName;
+    }
+}
diff --git a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/factory/evaluator/AggregationFunctionSerializableFactory.java b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/factory/evaluator/AggregationFunctionSerializableFactory.java
index 71d11c0..c1ee814 100644
--- a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/factory/evaluator/AggregationFunctionSerializableFactory.java
+++ b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/factory/evaluator/AggregationFunctionSerializableFactory.java
@@ -39,12 +39,14 @@
 import edu.uci.ics.hivesterix.serde.lazy.LazyFactory;
 import edu.uci.ics.hivesterix.serde.lazy.LazyObject;
 import edu.uci.ics.hivesterix.serde.lazy.LazySerDe;
+import edu.uci.ics.hivesterix.serde.lazy.LazyUtils;
 import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
 import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AggregateFunctionCallExpression;
 import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment;
 import edu.uci.ics.hyracks.algebricks.runtime.base.ICopySerializableAggregateFunction;
 import edu.uci.ics.hyracks.algebricks.runtime.base.ICopySerializableAggregateFunctionFactory;
 
+@SuppressWarnings("deprecation")
 public class AggregationFunctionSerializableFactory implements ICopySerializableAggregateFunctionFactory {
 
     private static final long serialVersionUID = 1L;
@@ -190,10 +192,19 @@
             String s = Utilities.serializeExpression(input);
             parametersSerialization.add(s);
         }
+
     }
 
     @Override
     public synchronized ICopySerializableAggregateFunction createAggregateFunction() throws AlgebricksException {
+        /**
+         * list of object inspectors correlated to types
+         */
+        List<ObjectInspector> oiListForTypes = new ArrayList<ObjectInspector>();
+        for (TypeInfo type : types) {
+            oiListForTypes.add(LazyUtils.getLazyObjectInspectorFromTypeInfo(type, false));
+        }
+
         if (parametersOrigin == null) {
             Configuration config = new Configuration();
             config.setClassLoader(this.getClass().getClassLoader());
@@ -328,7 +339,8 @@
             udafComplete = udafsComplete.get(threadId);
             if (udafComplete == null) {
                 try {
-                    udafComplete = FunctionRegistry.getGenericUDAFEvaluator(genericUDAFName, types, distinct, false);
+                    udafComplete = FunctionRegistry.getGenericUDAFEvaluator(genericUDAFName, oiListForTypes, distinct,
+                            false);
                 } catch (HiveException e) {
                     throw new AlgebricksException(e);
                 }
@@ -352,7 +364,8 @@
             udafPartial = udafsPartial.get(threadId);
             if (udafPartial == null) {
                 try {
-                    udafPartial = FunctionRegistry.getGenericUDAFEvaluator(genericUDAFName, types, distinct, false);
+                    udafPartial = FunctionRegistry.getGenericUDAFEvaluator(genericUDAFName, oiListForTypes, distinct,
+                            false);
                 } catch (HiveException e) {
                     throw new AlgebricksException(e);
                 }
diff --git a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/operator/filewrite/HiveFileWritePushRuntime.java b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/operator/filewrite/HiveFileWritePushRuntime.java
index e89a4c4..4bbb21f 100644
--- a/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/operator/filewrite/HiveFileWritePushRuntime.java
+++ b/hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/operator/filewrite/HiveFileWritePushRuntime.java
@@ -12,156 +12,176 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.hivesterix.runtime.operator.filewrite;
-
-import java.nio.ByteBuffer;
-
-import org.apache.hadoop.hive.ql.exec.FileSinkOperator;
-import org.apache.hadoop.hive.ql.exec.OperatorFactory;
-import org.apache.hadoop.hive.ql.exec.RowSchema;
-import org.apache.hadoop.hive.ql.metadata.HiveException;
-import org.apache.hadoop.hive.ql.plan.FileSinkDesc;
-import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
-import org.apache.hadoop.mapred.JobConf;
-
-import edu.uci.ics.hivesterix.runtime.jobgen.Schema;
-import edu.uci.ics.hivesterix.serde.lazy.LazyColumnar;
-import edu.uci.ics.hivesterix.serde.lazy.objectinspector.LazyColumnarObjectInspector;
-import edu.uci.ics.hyracks.algebricks.runtime.base.IPushRuntime;
-import edu.uci.ics.hyracks.api.comm.IFrameWriter;
-import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAccessor;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.FrameTupleReference;
-
-@SuppressWarnings("deprecation")
-public class HiveFileWritePushRuntime implements IPushRuntime {
-
-	/**
-	 * frame tuple accessor to access byte buffer
-	 */
-	private final FrameTupleAccessor accessor;
-
-	/**
-	 * input object inspector
-	 */
-	private final ObjectInspector inputInspector;
-
-	/**
-	 * cachedInput
-	 */
-	private final LazyColumnar cachedInput;
-
-	/**
-	 * File sink operator of Hive
-	 */
-	private final FileSinkDesc fileSink;
-
-	/**
-	 * job configuration, which contain name node and other configuration
-	 * information
-	 */
-	private JobConf conf;
-
-	/**
-	 * input object inspector
-	 */
-	private final Schema inputSchema;
-
-	/**
-	 * a copy of hive schema representation
-	 */
-	private RowSchema rowSchema;
-
-	/**
-	 * the Hive file sink operator
-	 */
-	private FileSinkOperator fsOp;
-
-	/**
-	 * cached tuple object reference
-	 */
-	private FrameTupleReference tuple = new FrameTupleReference();
-
-	/**
-	 * @param spec
-	 * @param fsProvider
-	 */
-	public HiveFileWritePushRuntime(IHyracksTaskContext context,
-			RecordDescriptor inputRecordDesc, JobConf job, FileSinkDesc fs,
-			RowSchema schema, Schema oi) {
-		fileSink = fs;
-		fileSink.setGatherStats(false);
-
-		rowSchema = schema;
-		conf = job;
-		inputSchema = oi;
-
-		accessor = new FrameTupleAccessor(context.getFrameSize(),
-				inputRecordDesc);
-		inputInspector = inputSchema.toObjectInspector();
-		cachedInput = new LazyColumnar(
-				(LazyColumnarObjectInspector) inputInspector);
-	}
-
-	@Override
-	public void open() throws HyracksDataException {
-		fsOp = (FileSinkOperator) OperatorFactory.get(fileSink, rowSchema);
-		fsOp.setChildOperators(null);
-		fsOp.setParentOperators(null);
-		conf.setClassLoader(this.getClass().getClassLoader());
-
-		ObjectInspector[] inspectors = new ObjectInspector[1];
-		inspectors[0] = inputInspector;
-		try {
-			fsOp.initialize(conf, inspectors);
-			fsOp.setExecContext(null);
-		} catch (Exception e) {
-			e.printStackTrace();
-		}
-	}
-
-	@Override
-	public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
-		accessor.reset(buffer);
-		int n = accessor.getTupleCount();
-		try {
-			for (int i = 0; i < n; ++i) {
-				tuple.reset(accessor, i);
-				cachedInput.init(tuple);
-				fsOp.process(cachedInput, 0);
-			}
-		} catch (HiveException e) {
-			throw new HyracksDataException(e);
-		}
-	}
-
-	@Override
-	public void close() throws HyracksDataException {
-		try {
-			Thread.currentThread().setContextClassLoader(
-					this.getClass().getClassLoader());
-			fsOp.closeOp(false);
-		} catch (HiveException e) {
-			throw new HyracksDataException(e);
-		}
-	}
-
-	@Override
-	public void setFrameWriter(int index, IFrameWriter writer,
-			RecordDescriptor recordDesc) {
-		throw new IllegalStateException();
-	}
-
-	@Override
-	public void setInputRecordDescriptor(int index,
-			RecordDescriptor recordDescriptor) {
-	}
-
-	@Override
-	public void fail() throws HyracksDataException {
-
-	}
-
-}
+package edu.uci.ics.hivesterix.runtime.operator.filewrite;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.logging.Logger;
+
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.hive.ql.exec.FileSinkOperator;
+import org.apache.hadoop.hive.ql.exec.OperatorFactory;
+import org.apache.hadoop.hive.ql.exec.RowSchema;
+import org.apache.hadoop.hive.ql.exec.Utilities;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.hive.ql.plan.FileSinkDesc;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
+import org.apache.hadoop.hive.shims.ShimLoader;
+import org.apache.hadoop.mapred.JobConf;
+
+import edu.uci.ics.hivesterix.runtime.jobgen.Schema;
+import edu.uci.ics.hivesterix.serde.lazy.LazyColumnar;
+import edu.uci.ics.hivesterix.serde.lazy.objectinspector.LazyColumnarObjectInspector;
+import edu.uci.ics.hyracks.algebricks.runtime.base.IPushRuntime;
+import edu.uci.ics.hyracks.api.comm.IFrameWriter;
+import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAccessor;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.FrameTupleReference;
+
+@SuppressWarnings("deprecation")
+public class HiveFileWritePushRuntime implements IPushRuntime {
+    private final static Logger LOGGER = Logger.getLogger(HiveFileWritePushRuntime.class.getName());
+
+    /**
+     * frame tuple accessor to access byte buffer
+     */
+    private final FrameTupleAccessor accessor;
+
+    /**
+     * input object inspector
+     */
+    private final ObjectInspector inputInspector;
+
+    /**
+     * cachedInput
+     */
+    private final LazyColumnar cachedInput;
+
+    /**
+     * File sink operator of Hive
+     */
+    private final FileSinkDesc fileSink;
+
+    /**
+     * job configuration, which contain name node and other configuration
+     * information
+     */
+    private JobConf conf;
+
+    /**
+     * input object inspector
+     */
+    private final Schema inputSchema;
+
+    /**
+     * a copy of hive schema representation
+     */
+    private RowSchema rowSchema;
+
+    /**
+     * the Hive file sink operator
+     */
+    private FileSinkOperator fsOp;
+
+    /**
+     * cached tuple object reference
+     */
+    private FrameTupleReference tuple = new FrameTupleReference();
+
+    /**
+     * @param spec
+     * @param fsProvider
+     */
+    public HiveFileWritePushRuntime(IHyracksTaskContext context, RecordDescriptor inputRecordDesc, JobConf job,
+            FileSinkDesc fs, RowSchema schema, Schema oi) {
+        fileSink = fs;
+        fileSink.setGatherStats(false);
+
+        rowSchema = schema;
+        conf = job;
+        inputSchema = oi;
+
+        accessor = new FrameTupleAccessor(context.getFrameSize(), inputRecordDesc);
+        inputInspector = inputSchema.toObjectInspector();
+        cachedInput = new LazyColumnar((LazyColumnarObjectInspector) inputInspector);
+    }
+
+    @Override
+    public void open() throws HyracksDataException {
+        fsOp = (FileSinkOperator) OperatorFactory.get(fileSink, rowSchema);
+        fsOp.setChildOperators(null);
+        fsOp.setParentOperators(null);
+        conf.setClassLoader(this.getClass().getClassLoader());
+
+        ObjectInspector[] inspectors = new ObjectInspector[1];
+        inspectors[0] = inputInspector;
+        try {
+            fsOp.initialize(conf, inspectors);
+            fsOp.setExecContext(null);
+            createTempDir();
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
+        accessor.reset(buffer);
+        int n = accessor.getTupleCount();
+        try {
+            for (int i = 0; i < n; ++i) {
+                tuple.reset(accessor, i);
+                cachedInput.init(tuple);
+                fsOp.process(cachedInput, 0);
+            }
+        } catch (HiveException e) {
+            throw new HyracksDataException(e);
+        }
+    }
+
+    @Override
+    public void close() throws HyracksDataException {
+        try {
+            Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader());
+            fsOp.closeOp(false);
+        } catch (HiveException e) {
+            throw new HyracksDataException(e);
+        }
+    }
+
+    @Override
+    public void setFrameWriter(int index, IFrameWriter writer, RecordDescriptor recordDesc) {
+        throw new IllegalStateException();
+    }
+
+    @Override
+    public void setInputRecordDescriptor(int index, RecordDescriptor recordDescriptor) {
+    }
+
+    @Override
+    public void fail() throws HyracksDataException {
+
+    }
+
+    private void createTempDir() throws IOException {
+        FileSinkDesc fdesc = fsOp.getConf();
+        String tempDir = fdesc.getDirName();
+        if (tempDir != null) {
+            Path tempPath = Utilities.toTempPath(new Path(tempDir));
+            FileSystem fs = tempPath.getFileSystem(conf);
+            if (!fs.exists(tempPath)) {
+                try {
+                    fs.mkdirs(tempPath);
+                    ShimLoader.getHadoopShims().fileSystemDeleteOnExit(fs, tempPath);
+                } catch (IOException e) {
+                    //if the dir already exists, that should be fine; so log a warning msg
+                    LOGGER.warning("create tmp result directory fails.");
+                }
+            }
+        }
+    }
+
+}
diff --git a/hivesterix/hivesterix-serde/pom.xml b/hivesterix/hivesterix-serde/pom.xml
index 97c9174..5b02ab3 100644
--- a/hivesterix/hivesterix-serde/pom.xml
+++ b/hivesterix/hivesterix-serde/pom.xml
@@ -42,16 +42,16 @@
 
 	<dependencies>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-serde</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-common</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
@@ -63,12 +63,12 @@
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-                        <groupId>edu.uci.ics.hyracks</groupId>
-                        <artifactId>hivesterix-common</artifactId>
-                        <version>0.2.7-SNAPSHOT</version>
-                        <type>jar</type>
-                        <scope>compile</scope>
-                </dependency>
+			<groupId>edu.uci.ics.hyracks</groupId>
+			<artifactId>hyracks-hdfs-core</artifactId>
+			<version>0.2.7-SNAPSHOT</version>
+			<type>jar</type>
+			<scope>compile</scope>
+		</dependency>
 		<dependency>
 			<groupId>junit</groupId>
 			<artifactId>junit</artifactId>
diff --git a/hivesterix/hivesterix-serde/src/main/java/edu/uci/ics/hivesterix/serde/lazy/LazySerDe.java b/hivesterix/hivesterix-serde/src/main/java/edu/uci/ics/hivesterix/serde/lazy/LazySerDe.java
index b5d64e8..2bbb1d5 100644
--- a/hivesterix/hivesterix-serde/src/main/java/edu/uci/ics/hivesterix/serde/lazy/LazySerDe.java
+++ b/hivesterix/hivesterix-serde/src/main/java/edu/uci/ics/hivesterix/serde/lazy/LazySerDe.java
@@ -46,6 +46,7 @@
 import org.apache.hadoop.hive.serde2.ByteStream.Output;
 import org.apache.hadoop.hive.serde2.SerDe;
 import org.apache.hadoop.hive.serde2.SerDeException;
+import org.apache.hadoop.hive.serde2.SerDeStats;
 import org.apache.hadoop.hive.serde2.objectinspector.ListObjectInspector;
 import org.apache.hadoop.hive.serde2.objectinspector.MapObjectInspector;
 import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
@@ -74,6 +75,7 @@
  * deserialized until required. Binary means a field is serialized in binary
  * compact format.
  */
+@SuppressWarnings("deprecation")
 public class LazySerDe implements SerDe {
 
     public static final Log LOG = LogFactory.getLog(LazySerDe.class.getName());
@@ -140,7 +142,6 @@
     /**
      * Deserialize a table record to a Lazy struct.
      */
-    @SuppressWarnings("deprecation")
     @Override
     public Object deserialize(Writable field) throws SerDeException {
         if (byteArrayRef == null) {
@@ -471,4 +472,9 @@
             }
         }
     }
+
+	@Override
+	public SerDeStats getSerDeStats() {
+		return null;
+	}
 }
diff --git a/hivesterix/hivesterix-translator/pom.xml b/hivesterix/hivesterix-translator/pom.xml
index 8a24d5e..b4c4454 100644
--- a/hivesterix/hivesterix-translator/pom.xml
+++ b/hivesterix/hivesterix-translator/pom.xml
@@ -42,9 +42,9 @@
 
 	<dependencies>
 		<dependency>
-			<groupId>org.apache.hadoop.hive</groupId>
+			<groupId>org.apache.hive</groupId>
 			<artifactId>hive-exec</artifactId>
-			<version>0.7.0</version>
+			<version>0.11.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
diff --git a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/HiveAlgebricksTranslator.java b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/HiveAlgebricksTranslator.java
index f32d85b..76cc51d 100644
--- a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/HiveAlgebricksTranslator.java
+++ b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/HiveAlgebricksTranslator.java
@@ -12,810 +12,809 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.hivesterix.logical.plan;
-
-import java.io.OutputStreamWriter;
-import java.io.PrintWriter;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.Map.Entry;
-import java.util.Set;
-
-import org.apache.commons.lang3.mutable.Mutable;
-import org.apache.commons.lang3.mutable.MutableObject;
-import org.apache.hadoop.hive.ql.exec.ColumnInfo;
-import org.apache.hadoop.hive.ql.exec.ExtractOperator;
-import org.apache.hadoop.hive.ql.exec.FileSinkOperator;
-import org.apache.hadoop.hive.ql.exec.FilterOperator;
-import org.apache.hadoop.hive.ql.exec.GroupByOperator;
-import org.apache.hadoop.hive.ql.exec.JoinOperator;
-import org.apache.hadoop.hive.ql.exec.LateralViewJoinOperator;
-import org.apache.hadoop.hive.ql.exec.LimitOperator;
-import org.apache.hadoop.hive.ql.exec.MapJoinOperator;
-import org.apache.hadoop.hive.ql.exec.Operator;
-import org.apache.hadoop.hive.ql.exec.ReduceSinkOperator;
-import org.apache.hadoop.hive.ql.exec.SelectOperator;
-import org.apache.hadoop.hive.ql.exec.TableScanOperator;
-import org.apache.hadoop.hive.ql.exec.UDF;
-import org.apache.hadoop.hive.ql.exec.UDTFOperator;
-import org.apache.hadoop.hive.ql.exec.UnionOperator;
-import org.apache.hadoop.hive.ql.plan.AggregationDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeColumnDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeConstantDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeFieldDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeNullDesc;
-import org.apache.hadoop.hive.ql.plan.PartitionDesc;
-import org.apache.hadoop.hive.ql.plan.UDTFDesc;
-import org.apache.hadoop.hive.ql.plan.api.OperatorType;
-import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
-import org.apache.hadoop.hive.ql.udf.generic.GenericUDFBridge;
-import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
-
-import edu.uci.ics.hivesterix.logical.expression.ExpressionConstant;
-import edu.uci.ics.hivesterix.logical.expression.HiveAlgebricksBuiltInFunctionMap;
-import edu.uci.ics.hivesterix.logical.expression.HiveFunctionInfo;
-import edu.uci.ics.hivesterix.logical.expression.HivesterixConstantValue;
-import edu.uci.ics.hivesterix.logical.plan.visitor.ExtractVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.FilterVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.GroupByVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.JoinVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.LateralViewJoinVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.LimitVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.MapJoinVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.ProjectVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.SortVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.TableScanWriteVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.UnionVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.base.Translator;
-import edu.uci.ics.hivesterix.logical.plan.visitor.base.Visitor;
-import edu.uci.ics.hivesterix.runtime.jobgen.Schema;
-import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalPlan;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AggregateFunctionCallExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.ConstantExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.ScalarFunctionCallExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.UnnestingFunctionCallExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.VariableReferenceExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
-import edu.uci.ics.hyracks.algebricks.core.algebra.metadata.IMetadataProvider;
-import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AssignOperator;
-import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ReplicateOperator;
-import edu.uci.ics.hyracks.algebricks.core.algebra.plan.ALogicalPlanImpl;
-import edu.uci.ics.hyracks.algebricks.core.algebra.prettyprint.LogicalOperatorPrettyPrintVisitor;
-import edu.uci.ics.hyracks.algebricks.core.algebra.prettyprint.PlanPrettyPrinter;
-
-@SuppressWarnings("rawtypes")
-public class HiveAlgebricksTranslator implements Translator {
-
-    private int currentVariable = 0;
-
-    private List<Mutable<ILogicalOperator>> logicalOp = new ArrayList<Mutable<ILogicalOperator>>();
-
-    private boolean continueTraverse = true;
-
-    private IMetadataProvider<PartitionDesc, Object> metaData;
-
-    /**
-     * map variable name to the logical variable
-     */
-    private HashMap<String, LogicalVariable> nameToLogicalVariableMap = new HashMap<String, LogicalVariable>();
-
-    /**
-     * map field name to LogicalVariable
-     */
-    private HashMap<String, LogicalVariable> fieldToLogicalVariableMap = new HashMap<String, LogicalVariable>();
-
-    /**
-     * map logical variable to name
-     */
-    private HashMap<LogicalVariable, String> logicalVariableToFieldMap = new HashMap<LogicalVariable, String>();
-
-    /**
-     * asterix root operators
-     */
-    private List<Mutable<ILogicalOperator>> rootOperators = new ArrayList<Mutable<ILogicalOperator>>();
-
-    /**
-     * a list of visitors
-     */
-    private List<Visitor> visitors = new ArrayList<Visitor>();
-
-    /**
-     * output writer to print things out
-     */
-    private static PrintWriter outputWriter = new PrintWriter(new OutputStreamWriter(System.out));
-
-    /**
-     * map a logical variable to type info
-     */
-    private HashMap<LogicalVariable, TypeInfo> variableToType = new HashMap<LogicalVariable, TypeInfo>();
-
-    @Override
-    public LogicalVariable getVariable(String fieldName, TypeInfo type) {
-        LogicalVariable var = fieldToLogicalVariableMap.get(fieldName);
-        if (var == null) {
-            currentVariable++;
-            var = new LogicalVariable(currentVariable);
-            fieldToLogicalVariableMap.put(fieldName, var);
-            nameToLogicalVariableMap.put(var.toString(), var);
-            variableToType.put(var, type);
-            logicalVariableToFieldMap.put(var, fieldName);
-        }
-        return var;
-    }
-
-    @Override
-    public LogicalVariable getNewVariable(String fieldName, TypeInfo type) {
-        currentVariable++;
-        LogicalVariable var = new LogicalVariable(currentVariable);
-        fieldToLogicalVariableMap.put(fieldName, var);
-        nameToLogicalVariableMap.put(var.toString(), var);
-        variableToType.put(var, type);
-        logicalVariableToFieldMap.put(var, fieldName);
-        return var;
-    }
-
-    @Override
-    public void replaceVariable(LogicalVariable oldVar, LogicalVariable newVar) {
-        String name = this.logicalVariableToFieldMap.get(oldVar);
-        if (name != null) {
-            fieldToLogicalVariableMap.put(name, newVar);
-            nameToLogicalVariableMap.put(newVar.toString(), newVar);
-            nameToLogicalVariableMap.put(oldVar.toString(), newVar);
-            logicalVariableToFieldMap.put(newVar, name);
-        }
-    }
-
-    @Override
-    public IMetadataProvider<PartitionDesc, Object> getMetadataProvider() {
-        return metaData;
-    }
-
-    /**
-     * only get an variable, without rewriting it
-     * 
-     * @param fieldName
-     * @return
-     */
-    private LogicalVariable getVariableOnly(String fieldName) {
-        return fieldToLogicalVariableMap.get(fieldName);
-    }
-
-    private void updateVariable(String fieldName, LogicalVariable variable) {
-        LogicalVariable var = fieldToLogicalVariableMap.get(fieldName);
-        if (var == null) {
-            fieldToLogicalVariableMap.put(fieldName, variable);
-            nameToLogicalVariableMap.put(fieldName, variable);
-        } else if (!var.equals(variable)) {
-            fieldToLogicalVariableMap.put(fieldName, variable);
-            nameToLogicalVariableMap.put(fieldName, variable);
-        }
-    }
-
-    /**
-     * get a list of logical variables from the schema
-     * 
-     * @param schema
-     * @return
-     */
-    @Override
-    public List<LogicalVariable> getVariablesFromSchema(Schema schema) {
-        List<LogicalVariable> variables = new ArrayList<LogicalVariable>();
-        List<String> names = schema.getNames();
-
-        for (String name : names)
-            variables.add(nameToLogicalVariableMap.get(name));
-        return variables;
-    }
-
-    /**
-     * get variable to typeinfo map
-     * 
-     * @return
-     */
-    public HashMap<LogicalVariable, TypeInfo> getVariableContext() {
-        return this.variableToType;
-    }
-
-    /**
-     * get the number of variables s
-     * 
-     * @return
-     */
-    public int getVariableCounter() {
-        return currentVariable + 1;
-    }
-
-    /**
-     * translate from hive operator tree to asterix operator tree
-     * 
-     * @param hive
-     *            roots
-     * @return Algebricks roots
-     */
-    public void translate(List<Operator> hiveRoot, ILogicalOperator parentOperator,
-            HashMap<String, PartitionDesc> aliasToPathMap) throws AlgebricksException {
-        /**
-         * register visitors
-         */
-        visitors.add(new FilterVisitor());
-        visitors.add(new GroupByVisitor());
-        visitors.add(new JoinVisitor());
-        visitors.add(new LateralViewJoinVisitor());
-        visitors.add(new UnionVisitor());
-        visitors.add(new LimitVisitor());
-        visitors.add(new MapJoinVisitor());
-        visitors.add(new ProjectVisitor());
-        visitors.add(new SortVisitor());
-        visitors.add(new ExtractVisitor());
-        visitors.add(new TableScanWriteVisitor(aliasToPathMap));
-
-        List<Mutable<ILogicalOperator>> refList = translate(hiveRoot, new MutableObject<ILogicalOperator>(
-                parentOperator));
-        insertReplicateOperator(refList);
-        if (refList != null)
-            rootOperators.addAll(refList);
-    }
-
-    /**
-     * translate operator DAG
-     * 
-     * @param hiveRoot
-     * @param AlgebricksParentOperator
-     * @return
-     */
-    private List<Mutable<ILogicalOperator>> translate(List<Operator> hiveRoot,
-            Mutable<ILogicalOperator> AlgebricksParentOperator) throws AlgebricksException {
-
-        for (Operator hiveOperator : hiveRoot) {
-            continueTraverse = true;
-            Mutable<ILogicalOperator> currentOperatorRef = null;
-            if (hiveOperator.getType() == OperatorType.FILTER) {
-                FilterOperator fop = (FilterOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null)
-                        break;
-                }
-            } else if (hiveOperator.getType() == OperatorType.REDUCESINK) {
-                ReduceSinkOperator fop = (ReduceSinkOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null)
-                        break;
-                }
-            } else if (hiveOperator.getType() == OperatorType.JOIN) {
-                JoinOperator fop = (JoinOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null) {
-                        continueTraverse = true;
-                        break;
-                    } else
-                        continueTraverse = false;
-                }
-                if (currentOperatorRef == null)
-                    return null;
-            } else if (hiveOperator.getType() == OperatorType.LATERALVIEWJOIN) {
-                LateralViewJoinOperator fop = (LateralViewJoinOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null)
-                        break;
-                }
-                if (currentOperatorRef == null)
-                    return null;
-            } else if (hiveOperator.getType() == OperatorType.MAPJOIN) {
-                MapJoinOperator fop = (MapJoinOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null) {
-                        continueTraverse = true;
-                        break;
-                    } else
-                        continueTraverse = false;
-                }
-                if (currentOperatorRef == null)
-                    return null;
-            } else if (hiveOperator.getType() == OperatorType.SELECT) {
-                SelectOperator fop = (SelectOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null)
-                        break;
-                }
-            } else if (hiveOperator.getType() == OperatorType.EXTRACT) {
-                ExtractOperator fop = (ExtractOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null)
-                        break;
-                }
-            } else if (hiveOperator.getType() == OperatorType.GROUPBY) {
-                GroupByOperator fop = (GroupByOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null)
-                        break;
-                }
-            } else if (hiveOperator.getType() == OperatorType.TABLESCAN) {
-                TableScanOperator fop = (TableScanOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null)
-                        break;
-                }
-            } else if (hiveOperator.getType() == OperatorType.FILESINK) {
-                FileSinkOperator fop = (FileSinkOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null)
-                        break;
-                }
-            } else if (hiveOperator.getType() == OperatorType.LIMIT) {
-                LimitOperator lop = (LimitOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(lop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null)
-                        break;
-                }
-            } else if (hiveOperator.getType() == OperatorType.UDTF) {
-                UDTFOperator lop = (UDTFOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(lop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null)
-                        break;
-                }
-            } else if (hiveOperator.getType() == OperatorType.UNION) {
-                UnionOperator lop = (UnionOperator) hiveOperator;
-                for (Visitor visitor : visitors) {
-                    currentOperatorRef = visitor.visit(lop, AlgebricksParentOperator, this);
-                    if (currentOperatorRef != null) {
-                        continueTraverse = true;
-                        break;
-                    } else
-                        continueTraverse = false;
-                }
-            } else
-                ;
-            if (hiveOperator.getChildOperators() != null && hiveOperator.getChildOperators().size() > 0
-                    && continueTraverse) {
-                @SuppressWarnings("unchecked")
-                List<Operator> children = hiveOperator.getChildOperators();
-                if (currentOperatorRef == null)
-                    currentOperatorRef = AlgebricksParentOperator;
-                translate(children, currentOperatorRef);
-            }
-            if (hiveOperator.getChildOperators() == null || hiveOperator.getChildOperators().size() == 0)
-                logicalOp.add(currentOperatorRef);
-        }
-        return logicalOp;
-    }
-
-    /**
-     * used in select, group by to get no-column-expression columns
-     * 
-     * @param cols
-     * @return
-     */
-    public ILogicalOperator getAssignOperator(Mutable<ILogicalOperator> parent, List<ExprNodeDesc> cols,
-            ArrayList<LogicalVariable> variables) {
-
-        ArrayList<Mutable<ILogicalExpression>> expressions = new ArrayList<Mutable<ILogicalExpression>>();
-
-        /**
-         * variables to be appended in the assign operator
-         */
-        ArrayList<LogicalVariable> appendedVariables = new ArrayList<LogicalVariable>();
-
-        // one variable can only be assigned once
-        for (ExprNodeDesc hiveExpr : cols) {
-            rewriteExpression(hiveExpr);
-
-            if (hiveExpr instanceof ExprNodeColumnDesc) {
-                ExprNodeColumnDesc desc2 = (ExprNodeColumnDesc) hiveExpr;
-                String fieldName = desc2.getTabAlias() + "." + desc2.getColumn();
-
-                // System.out.println("project expr: " + fieldName);
-
-                if (fieldName.indexOf("$$") < 0) {
-                    LogicalVariable var = getVariable(fieldName, hiveExpr.getTypeInfo());
-                    desc2.setColumn(var.toString());
-                    desc2.setTabAlias("");
-                    variables.add(var);
-                } else {
-                    LogicalVariable var = nameToLogicalVariableMap.get(desc2.getColumn());
-                    String name = this.logicalVariableToFieldMap.get(var);
-                    var = this.getVariableOnly(name);
-                    variables.add(var);
-                }
-            } else {
-                Mutable<ILogicalExpression> asterixExpr = translateScalarFucntion(hiveExpr);
-                expressions.add(asterixExpr);
-                LogicalVariable var = getVariable(hiveExpr.getExprString() + asterixExpr.hashCode(),
-                        hiveExpr.getTypeInfo());
-                variables.add(var);
-                appendedVariables.add(var);
-            }
-        }
-
-        /**
-         * create an assign operator to deal with appending
-         */
-        ILogicalOperator assignOp = null;
-        if (appendedVariables.size() > 0) {
-            assignOp = new AssignOperator(appendedVariables, expressions);
-            assignOp.getInputs().add(parent);
-        }
-        return assignOp;
-    }
-
-    private ILogicalPlan plan;
-
-    public ILogicalPlan genLogicalPlan() {
-        plan = new ALogicalPlanImpl(rootOperators);
-        return plan;
-    }
-
-    public void printOperators() throws AlgebricksException {
-        LogicalOperatorPrettyPrintVisitor pvisitor = new LogicalOperatorPrettyPrintVisitor();
-        StringBuilder buffer = new StringBuilder();
-        PlanPrettyPrinter.printPlan(plan, buffer, pvisitor, 0);
-        outputWriter.println(buffer);
-        outputWriter.println("rewritten variables: ");
-        outputWriter.flush();
-        printVariables();
-
-    }
-
-    public static void setOutputPrinter(PrintWriter writer) {
-        outputWriter = writer;
-    }
-
-    private void printVariables() {
-        Set<Entry<String, LogicalVariable>> entries = fieldToLogicalVariableMap.entrySet();
-
-        for (Entry<String, LogicalVariable> entry : entries) {
-            outputWriter.println(entry.getKey() + " -> " + entry.getValue());
-        }
-        outputWriter.flush();
-    }
-
-    /**
-     * generate the object inspector for the output of an operator
-     * 
-     * @param operator
-     *            The Hive operator
-     * @return an ObjectInspector object
-     */
-    public Schema generateInputSchema(Operator operator) {
-        List<String> variableNames = new ArrayList<String>();
-        List<TypeInfo> typeList = new ArrayList<TypeInfo>();
-        List<ColumnInfo> columns = operator.getSchema().getSignature();
-
-        for (ColumnInfo col : columns) {
-            // typeList.add();
-            TypeInfo type = col.getType();
-            typeList.add(type);
-
-            String fieldName = col.getInternalName();
-            variableNames.add(fieldName);
-        }
-
-        return new Schema(variableNames, typeList);
-    }
-
-    /**
-     * rewrite the names of output columns for feature expression evaluators to
-     * use
-     * 
-     * @param operator
-     */
-    public void rewriteOperatorOutputSchema(Operator operator) {
-        List<ColumnInfo> columns = operator.getSchema().getSignature();
-
-        for (ColumnInfo column : columns) {
-            String columnName = column.getTabAlias() + "." + column.getInternalName();
-            if (columnName.indexOf("$$") < 0) {
-                LogicalVariable var = getVariable(columnName, column.getType());
-                column.setInternalName(var.toString());
-            }
-        }
-    }
-
-    @Override
-    public void rewriteOperatorOutputSchema(List<LogicalVariable> variables, Operator operator) {
-
-        //printOperatorSchema(operator);
-        List<ColumnInfo> columns = operator.getSchema().getSignature();
-        if (variables.size() != columns.size()) {
-            throw new IllegalStateException("output cardinality error " + operator.getName() + " variable size: "
-                    + variables.size() + " expected " + columns.size());
-        }
-
-        for (int i = 0; i < variables.size(); i++) {
-            LogicalVariable var = variables.get(i);
-            ColumnInfo column = columns.get(i);
-            String fieldName = column.getTabAlias() + "." + column.getInternalName();
-            if (fieldName.indexOf("$$") < 0) {
-                updateVariable(fieldName, var);
-                column.setInternalName(var.toString());
-            }
-        }
-        //printOperatorSchema(operator);
-    }
-
-    /**
-     * rewrite an expression and substitute variables
-     * 
-     * @param expr
-     *            hive expression
-     */
-    public void rewriteExpression(ExprNodeDesc expr) {
-        if (expr instanceof ExprNodeColumnDesc) {
-            ExprNodeColumnDesc desc = (ExprNodeColumnDesc) expr;
-            String fieldName = desc.getTabAlias() + "." + desc.getColumn();
-            if (fieldName.indexOf("$$") < 0) {
-                LogicalVariable var = getVariableOnly(fieldName);
-                if (var == null) {
-                    fieldName = "." + desc.getColumn();
-                    var = getVariableOnly(fieldName);
-                    if (var == null) {
-                        fieldName = "null." + desc.getColumn();
-                        var = getVariableOnly(fieldName);
-                        if (var == null) {
-                            throw new IllegalStateException(fieldName + " is wrong!!! ");
-                        }
-                    }
-                }
-                String name = this.logicalVariableToFieldMap.get(var);
-                var = getVariableOnly(name);
-                desc.setColumn(var.toString());
-            }
-        } else {
-            if (expr.getChildren() != null && expr.getChildren().size() > 0) {
-                List<ExprNodeDesc> children = expr.getChildren();
-                for (ExprNodeDesc desc : children)
-                    rewriteExpression(desc);
-            }
-        }
-    }
-
-    /**
-     * rewrite an expression and substitute variables
-     * 
-     * @param expr
-     *            hive expression
-     */
-    public void rewriteExpressionPartial(ExprNodeDesc expr) {
-        if (expr instanceof ExprNodeColumnDesc) {
-            ExprNodeColumnDesc desc = (ExprNodeColumnDesc) expr;
-            String fieldName = desc.getTabAlias() + "." + desc.getColumn();
-            if (fieldName.indexOf("$$") < 0) {
-                LogicalVariable var = getVariableOnly(fieldName);
-                desc.setColumn(var.toString());
-            }
-        } else {
-            if (expr.getChildren() != null && expr.getChildren().size() > 0) {
-                List<ExprNodeDesc> children = expr.getChildren();
-                for (ExprNodeDesc desc : children)
-                    rewriteExpressionPartial(desc);
-            }
-        }
-    }
-
-    // private void printOperatorSchema(Operator operator) {
-    // // System.out.println(operator.getName());
-    // // List<ColumnInfo> columns = operator.getSchema().getSignature();
-    // // for (ColumnInfo column : columns) {
-    // // System.out.print(column.getTabAlias() + "." +
-    // // column.getInternalName() + "  ");
-    // // }
-    // // System.out.println();
-    // }
-
-    /**
-     * translate scalar function expression
-     * 
-     * @param hiveExpr
-     * @return
-     */
-    public Mutable<ILogicalExpression> translateScalarFucntion(ExprNodeDesc hiveExpr) {
-        ILogicalExpression AlgebricksExpr;
-
-        if (hiveExpr instanceof ExprNodeGenericFuncDesc) {
-            List<Mutable<ILogicalExpression>> arguments = new ArrayList<Mutable<ILogicalExpression>>();
-            List<ExprNodeDesc> children = hiveExpr.getChildren();
-
-            for (ExprNodeDesc child : children)
-                arguments.add(translateScalarFucntion(child));
-
-            ExprNodeGenericFuncDesc funcExpr = (ExprNodeGenericFuncDesc) hiveExpr;
-            GenericUDF genericUdf = funcExpr.getGenericUDF();
-            UDF udf = null;
-            if (genericUdf instanceof GenericUDFBridge) {
-                GenericUDFBridge bridge = (GenericUDFBridge) genericUdf;
-                try {
-                    udf = bridge.getUdfClass().newInstance();
-                } catch (Exception e) {
-                    e.printStackTrace();
-                }
-            }
-
-            /**
-             * set up the hive function
-             */
-            Object hiveFunction = genericUdf;
-            if (udf != null)
-                hiveFunction = udf;
-
-            FunctionIdentifier funcId = HiveAlgebricksBuiltInFunctionMap.INSTANCE.getAlgebricksFunctionId(hiveFunction
-                    .getClass());
-            if (funcId == null) {
-                funcId = new FunctionIdentifier(ExpressionConstant.NAMESPACE, hiveFunction.getClass().getName());
-            }
-
-            Object functionInfo = null;
-            if (genericUdf instanceof GenericUDFBridge) {
-                functionInfo = funcExpr;
-            }
-
-            /**
-             * generate the function call expression
-             */
-            ScalarFunctionCallExpression AlgebricksFuncExpr = new ScalarFunctionCallExpression(new HiveFunctionInfo(
-                    funcId, functionInfo), arguments);
-            AlgebricksExpr = AlgebricksFuncExpr;
-
-        } else if (hiveExpr instanceof ExprNodeColumnDesc) {
-            ExprNodeColumnDesc column = (ExprNodeColumnDesc) hiveExpr;
-            LogicalVariable var = this.getVariable(column.getColumn());
-            AlgebricksExpr = new VariableReferenceExpression(var);
-
-        } else if (hiveExpr instanceof ExprNodeFieldDesc) {
-            FunctionIdentifier funcId;
-            funcId = new FunctionIdentifier(ExpressionConstant.NAMESPACE, ExpressionConstant.FIELDACCESS);
-
-            ScalarFunctionCallExpression AlgebricksFuncExpr = new ScalarFunctionCallExpression(new HiveFunctionInfo(
-                    funcId, hiveExpr));
-            AlgebricksExpr = AlgebricksFuncExpr;
-        } else if (hiveExpr instanceof ExprNodeConstantDesc) {
-            ExprNodeConstantDesc hiveConst = (ExprNodeConstantDesc) hiveExpr;
-            Object value = hiveConst.getValue();
-            AlgebricksExpr = new ConstantExpression(new HivesterixConstantValue(value));
-        } else if (hiveExpr instanceof ExprNodeNullDesc) {
-            FunctionIdentifier funcId;
-            funcId = new FunctionIdentifier(ExpressionConstant.NAMESPACE, ExpressionConstant.NULL);
-
-            ScalarFunctionCallExpression AlgebricksFuncExpr = new ScalarFunctionCallExpression(new HiveFunctionInfo(
-                    funcId, hiveExpr));
-
-            AlgebricksExpr = AlgebricksFuncExpr;
-        } else {
-            throw new IllegalStateException("unknown hive expression");
-        }
-        return new MutableObject<ILogicalExpression>(AlgebricksExpr);
-    }
-
-    /**
-     * translate aggregation function expression
-     * 
-     * @param aggregateDesc
-     * @return
-     */
-    public Mutable<ILogicalExpression> translateAggregation(AggregationDesc aggregateDesc) {
-
-        String UDAFName = aggregateDesc.getGenericUDAFName();
-
-        List<Mutable<ILogicalExpression>> arguments = new ArrayList<Mutable<ILogicalExpression>>();
-        List<ExprNodeDesc> children = aggregateDesc.getParameters();
-
-        for (ExprNodeDesc child : children)
-            arguments.add(translateScalarFucntion(child));
-
-        FunctionIdentifier funcId = new FunctionIdentifier(ExpressionConstant.NAMESPACE, UDAFName + "("
-                + aggregateDesc.getMode() + ")");
-        HiveFunctionInfo funcInfo = new HiveFunctionInfo(funcId, aggregateDesc);
-        AggregateFunctionCallExpression aggregationExpression = new AggregateFunctionCallExpression(funcInfo, false,
-                arguments);
-        return new MutableObject<ILogicalExpression>(aggregationExpression);
-    }
-
-    /**
-     * translate aggregation function expression
-     * 
-     * @param aggregator
-     * @return
-     */
-    public Mutable<ILogicalExpression> translateUnnestFunction(UDTFDesc udtfDesc, Mutable<ILogicalExpression> argument) {
-
-        String UDTFName = udtfDesc.getUDTFName();
-
-        FunctionIdentifier funcId = new FunctionIdentifier(ExpressionConstant.NAMESPACE, UDTFName);
-        UnnestingFunctionCallExpression unnestingExpression = new UnnestingFunctionCallExpression(new HiveFunctionInfo(
-                funcId, udtfDesc));
-        unnestingExpression.getArguments().add(argument);
-        return new MutableObject<ILogicalExpression>(unnestingExpression);
-    }
-
-    /**
-     * get typeinfo
-     */
-    @Override
-    public TypeInfo getType(LogicalVariable var) {
-        return variableToType.get(var);
-    }
-
-    /**
-     * get variable from variable name
-     */
-    @Override
-    public LogicalVariable getVariable(String name) {
-        return nameToLogicalVariableMap.get(name);
-    }
-
-    @Override
-    public LogicalVariable getVariableFromFieldName(String fieldName) {
-        return this.getVariableOnly(fieldName);
-    }
-
-    /**
-     * set the metadata provider
-     */
-    @Override
-    public void setMetadataProvider(IMetadataProvider<PartitionDesc, Object> metadata) {
-        this.metaData = metadata;
-    }
-
-    /**
-     * insert ReplicateOperator when necessary
-     */
-    private void insertReplicateOperator(List<Mutable<ILogicalOperator>> roots) {
-        Map<Mutable<ILogicalOperator>, List<Mutable<ILogicalOperator>>> childToParentsMap = new HashMap<Mutable<ILogicalOperator>, List<Mutable<ILogicalOperator>>>();
-        buildChildToParentsMapping(roots, childToParentsMap);
-        for (Entry<Mutable<ILogicalOperator>, List<Mutable<ILogicalOperator>>> entry : childToParentsMap.entrySet()) {
-            List<Mutable<ILogicalOperator>> pList = entry.getValue();
-            if (pList.size() > 1) {
-                ILogicalOperator rop = new ReplicateOperator(pList.size());
-                Mutable<ILogicalOperator> ropRef = new MutableObject<ILogicalOperator>(rop);
-                Mutable<ILogicalOperator> childRef = entry.getKey();
-                rop.getInputs().add(childRef);
-                for (Mutable<ILogicalOperator> parentRef : pList) {
-                    ILogicalOperator parentOp = parentRef.getValue();
-                    int index = parentOp.getInputs().indexOf(childRef);
-                    parentOp.getInputs().set(index, ropRef);
-                }
-            }
-        }
-    }
-
-    /**
-     * build the mapping from child to Parents
-     * 
-     * @param roots
-     * @param childToParentsMap
-     */
-    private void buildChildToParentsMapping(List<Mutable<ILogicalOperator>> roots,
-            Map<Mutable<ILogicalOperator>, List<Mutable<ILogicalOperator>>> map) {
-        for (Mutable<ILogicalOperator> opRef : roots) {
-            List<Mutable<ILogicalOperator>> childRefs = opRef.getValue().getInputs();
-            for (Mutable<ILogicalOperator> childRef : childRefs) {
-                List<Mutable<ILogicalOperator>> parentList = map.get(childRef);
-                if (parentList == null) {
-                    parentList = new ArrayList<Mutable<ILogicalOperator>>();
-                    map.put(childRef, parentList);
-                }
-                if (!parentList.contains(opRef))
-                    parentList.add(opRef);
-            }
-            buildChildToParentsMapping(childRefs, map);
-        }
-    }
-}
+package edu.uci.ics.hivesterix.logical.plan;
+
+import java.io.OutputStreamWriter;
+import java.io.PrintWriter;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+
+import org.apache.commons.lang3.mutable.Mutable;
+import org.apache.commons.lang3.mutable.MutableObject;
+import org.apache.hadoop.hive.ql.exec.ColumnInfo;
+import org.apache.hadoop.hive.ql.exec.ExtractOperator;
+import org.apache.hadoop.hive.ql.exec.FileSinkOperator;
+import org.apache.hadoop.hive.ql.exec.FilterOperator;
+import org.apache.hadoop.hive.ql.exec.GroupByOperator;
+import org.apache.hadoop.hive.ql.exec.JoinOperator;
+import org.apache.hadoop.hive.ql.exec.LateralViewJoinOperator;
+import org.apache.hadoop.hive.ql.exec.LimitOperator;
+import org.apache.hadoop.hive.ql.exec.MapJoinOperator;
+import org.apache.hadoop.hive.ql.exec.Operator;
+import org.apache.hadoop.hive.ql.exec.ReduceSinkOperator;
+import org.apache.hadoop.hive.ql.exec.SelectOperator;
+import org.apache.hadoop.hive.ql.exec.TableScanOperator;
+import org.apache.hadoop.hive.ql.exec.UDF;
+import org.apache.hadoop.hive.ql.exec.UDTFOperator;
+import org.apache.hadoop.hive.ql.exec.UnionOperator;
+import org.apache.hadoop.hive.ql.plan.AggregationDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeColumnDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeConstantDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeFieldDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeNullDesc;
+import org.apache.hadoop.hive.ql.plan.PartitionDesc;
+import org.apache.hadoop.hive.ql.plan.UDTFDesc;
+import org.apache.hadoop.hive.ql.plan.api.OperatorType;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDFBridge;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
+
+import edu.uci.ics.hivesterix.logical.expression.ExpressionConstant;
+import edu.uci.ics.hivesterix.logical.expression.HiveAlgebricksBuiltInFunctionMap;
+import edu.uci.ics.hivesterix.logical.expression.HiveFunctionInfo;
+import edu.uci.ics.hivesterix.logical.expression.HivesterixConstantValue;
+import edu.uci.ics.hivesterix.logical.plan.visitor.ExtractVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.FilterVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.GroupByVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.JoinVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.LateralViewJoinVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.LimitVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.MapJoinVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.ProjectVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.SortVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.TableScanWriteVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.UnionVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.base.Translator;
+import edu.uci.ics.hivesterix.logical.plan.visitor.base.Visitor;
+import edu.uci.ics.hivesterix.runtime.jobgen.Schema;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalPlan;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AggregateFunctionCallExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.ConstantExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.ScalarFunctionCallExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.UnnestingFunctionCallExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.VariableReferenceExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.core.algebra.metadata.IMetadataProvider;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AssignOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ReplicateOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.plan.ALogicalPlanImpl;
+import edu.uci.ics.hyracks.algebricks.core.algebra.prettyprint.LogicalOperatorPrettyPrintVisitor;
+import edu.uci.ics.hyracks.algebricks.core.algebra.prettyprint.PlanPrettyPrinter;
+
+@SuppressWarnings("rawtypes")
+public class HiveAlgebricksTranslator implements Translator {
+
+    private int currentVariable = 0;
+
+    private List<Mutable<ILogicalOperator>> logicalOp = new ArrayList<Mutable<ILogicalOperator>>();
+
+    private boolean continueTraverse = true;
+
+    private IMetadataProvider<PartitionDesc, Object> metaData;
+
+    /**
+     * map variable name to the logical variable
+     */
+    private HashMap<String, LogicalVariable> nameToLogicalVariableMap = new HashMap<String, LogicalVariable>();
+
+    /**
+     * map field name to LogicalVariable
+     */
+    private HashMap<String, LogicalVariable> fieldToLogicalVariableMap = new HashMap<String, LogicalVariable>();
+
+    /**
+     * map logical variable to name
+     */
+    private HashMap<LogicalVariable, String> logicalVariableToFieldMap = new HashMap<LogicalVariable, String>();
+
+    /**
+     * asterix root operators
+     */
+    private List<Mutable<ILogicalOperator>> rootOperators = new ArrayList<Mutable<ILogicalOperator>>();
+
+    /**
+     * a list of visitors
+     */
+    private List<Visitor> visitors = new ArrayList<Visitor>();
+
+    /**
+     * output writer to print things out
+     */
+    private static PrintWriter outputWriter = new PrintWriter(new OutputStreamWriter(System.out));
+
+    /**
+     * map a logical variable to type info
+     */
+    private HashMap<LogicalVariable, TypeInfo> variableToType = new HashMap<LogicalVariable, TypeInfo>();
+
+    @Override
+    public LogicalVariable getVariable(String fieldName, TypeInfo type) {
+        LogicalVariable var = fieldToLogicalVariableMap.get(fieldName);
+        if (var == null) {
+            currentVariable++;
+            var = new LogicalVariable(currentVariable);
+            fieldToLogicalVariableMap.put(fieldName, var);
+            nameToLogicalVariableMap.put(var.toString(), var);
+            variableToType.put(var, type);
+            logicalVariableToFieldMap.put(var, fieldName);
+        }
+        return var;
+    }
+
+    @Override
+    public LogicalVariable getNewVariable(String fieldName, TypeInfo type) {
+        currentVariable++;
+        LogicalVariable var = new LogicalVariable(currentVariable);
+        fieldToLogicalVariableMap.put(fieldName, var);
+        nameToLogicalVariableMap.put(var.toString(), var);
+        variableToType.put(var, type);
+        logicalVariableToFieldMap.put(var, fieldName);
+        return var;
+    }
+
+    @Override
+    public void replaceVariable(LogicalVariable oldVar, LogicalVariable newVar) {
+        String name = this.logicalVariableToFieldMap.get(oldVar);
+        if (name != null) {
+            fieldToLogicalVariableMap.put(name, newVar);
+            nameToLogicalVariableMap.put(newVar.toString(), newVar);
+            nameToLogicalVariableMap.put(oldVar.toString(), newVar);
+            logicalVariableToFieldMap.put(newVar, name);
+        }
+    }
+
+    @Override
+    public IMetadataProvider<PartitionDesc, Object> getMetadataProvider() {
+        return metaData;
+    }
+
+    /**
+     * only get an variable, without rewriting it
+     * 
+     * @param fieldName
+     * @return
+     */
+    private LogicalVariable getVariableOnly(String fieldName) {
+        return fieldToLogicalVariableMap.get(fieldName);
+    }
+
+    public void updateVariable(String fieldName, LogicalVariable variable) {
+        LogicalVariable var = fieldToLogicalVariableMap.get(fieldName);
+        if (var == null) {
+            fieldToLogicalVariableMap.put(fieldName, variable);
+            nameToLogicalVariableMap.put(fieldName, variable);
+        } else if (!var.equals(variable)) {
+            fieldToLogicalVariableMap.put(fieldName, variable);
+            nameToLogicalVariableMap.put(fieldName, variable);
+        }
+    }
+
+    /**
+     * get a list of logical variables from the schema
+     * 
+     * @param schema
+     * @return
+     */
+    @Override
+    public List<LogicalVariable> getVariablesFromSchema(Schema schema) {
+        List<LogicalVariable> variables = new ArrayList<LogicalVariable>();
+        List<String> names = schema.getNames();
+
+        for (String name : names)
+            variables.add(nameToLogicalVariableMap.get(name));
+        return variables;
+    }
+
+    /**
+     * get variable to typeinfo map
+     * 
+     * @return
+     */
+    public HashMap<LogicalVariable, TypeInfo> getVariableContext() {
+        return this.variableToType;
+    }
+
+    /**
+     * get the number of variables s
+     * 
+     * @return
+     */
+    public int getVariableCounter() {
+        return currentVariable + 1;
+    }
+
+    /**
+     * translate from hive operator tree to asterix operator tree
+     * 
+     * @param hive
+     *            roots
+     * @return Algebricks roots
+     */
+    public void translate(List<Operator> hiveRoot, ILogicalOperator parentOperator,
+            HashMap<String, PartitionDesc> aliasToPathMap) throws AlgebricksException {
+        /**
+         * register visitors
+         */
+        visitors.add(new FilterVisitor());
+        visitors.add(new GroupByVisitor());
+        visitors.add(new JoinVisitor());
+        visitors.add(new LateralViewJoinVisitor());
+        visitors.add(new UnionVisitor());
+        visitors.add(new LimitVisitor());
+        visitors.add(new MapJoinVisitor());
+        visitors.add(new ProjectVisitor());
+        visitors.add(new SortVisitor());
+        visitors.add(new ExtractVisitor());
+        visitors.add(new TableScanWriteVisitor(aliasToPathMap));
+
+        List<Mutable<ILogicalOperator>> refList = translate(hiveRoot, new MutableObject<ILogicalOperator>(
+                parentOperator));
+        insertReplicateOperator(refList);
+        if (refList != null)
+            rootOperators.addAll(refList);
+    }
+
+    /**
+     * translate operator DAG
+     * 
+     * @param hiveRoot
+     * @param AlgebricksParentOperator
+     * @return
+     */
+    private List<Mutable<ILogicalOperator>> translate(List<Operator> hiveRoot,
+            Mutable<ILogicalOperator> AlgebricksParentOperator) throws AlgebricksException {
+
+        for (Operator hiveOperator : hiveRoot) {
+            continueTraverse = true;
+            Mutable<ILogicalOperator> currentOperatorRef = null;
+            if (hiveOperator.getType() == OperatorType.FILTER) {
+                FilterOperator fop = (FilterOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null)
+                        break;
+                }
+            } else if (hiveOperator.getType() == OperatorType.REDUCESINK) {
+                ReduceSinkOperator fop = (ReduceSinkOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null)
+                        break;
+                }
+            } else if (hiveOperator.getType() == OperatorType.JOIN) {
+                JoinOperator fop = (JoinOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null) {
+                        continueTraverse = true;
+                        break;
+                    } else
+                        continueTraverse = false;
+                }
+                if (currentOperatorRef == null)
+                    return null;
+            } else if (hiveOperator.getType() == OperatorType.LATERALVIEWJOIN) {
+                LateralViewJoinOperator fop = (LateralViewJoinOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null)
+                        break;
+                }
+                if (currentOperatorRef == null)
+                    return null;
+            } else if (hiveOperator.getType() == OperatorType.MAPJOIN) {
+                MapJoinOperator fop = (MapJoinOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null) {
+                        continueTraverse = true;
+                        break;
+                    } else
+                        continueTraverse = false;
+                }
+                if (currentOperatorRef == null)
+                    return null;
+            } else if (hiveOperator.getType() == OperatorType.SELECT) {
+                SelectOperator fop = (SelectOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null)
+                        break;
+                }
+            } else if (hiveOperator.getType() == OperatorType.EXTRACT) {
+                ExtractOperator fop = (ExtractOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null)
+                        break;
+                }
+            } else if (hiveOperator.getType() == OperatorType.GROUPBY) {
+                GroupByOperator fop = (GroupByOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null)
+                        break;
+                }
+            } else if (hiveOperator.getType() == OperatorType.TABLESCAN) {
+                TableScanOperator fop = (TableScanOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null)
+                        break;
+                }
+            } else if (hiveOperator.getType() == OperatorType.FILESINK) {
+                FileSinkOperator fop = (FileSinkOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(fop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null)
+                        break;
+                }
+            } else if (hiveOperator.getType() == OperatorType.LIMIT) {
+                LimitOperator lop = (LimitOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(lop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null)
+                        break;
+                }
+            } else if (hiveOperator.getType() == OperatorType.UDTF) {
+                UDTFOperator lop = (UDTFOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(lop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null)
+                        break;
+                }
+            } else if (hiveOperator.getType() == OperatorType.UNION) {
+                UnionOperator lop = (UnionOperator) hiveOperator;
+                for (Visitor visitor : visitors) {
+                    currentOperatorRef = visitor.visit(lop, AlgebricksParentOperator, this);
+                    if (currentOperatorRef != null) {
+                        continueTraverse = true;
+                        break;
+                    } else
+                        continueTraverse = false;
+                }
+            } else
+                ;
+            if (hiveOperator.getChildOperators() != null && hiveOperator.getChildOperators().size() > 0
+                    && continueTraverse) {
+                @SuppressWarnings("unchecked")
+                List<Operator> children = hiveOperator.getChildOperators();
+                if (currentOperatorRef == null)
+                    currentOperatorRef = AlgebricksParentOperator;
+                translate(children, currentOperatorRef);
+            }
+            if (hiveOperator.getChildOperators() == null || hiveOperator.getChildOperators().size() == 0)
+                logicalOp.add(currentOperatorRef);
+        }
+        return logicalOp;
+    }
+
+    /**
+     * used in select, group by to get no-column-expression columns
+     * 
+     * @param cols
+     * @return
+     */
+    public ILogicalOperator getAssignOperator(Mutable<ILogicalOperator> parent, List<ExprNodeDesc> cols,
+            ArrayList<LogicalVariable> variables) {
+
+        ArrayList<Mutable<ILogicalExpression>> expressions = new ArrayList<Mutable<ILogicalExpression>>();
+
+        /**
+         * variables to be appended in the assign operator
+         */
+        ArrayList<LogicalVariable> appendedVariables = new ArrayList<LogicalVariable>();
+
+        // one variable can only be assigned once
+        for (ExprNodeDesc hiveExpr : cols) {
+            rewriteExpression(hiveExpr);
+
+            if (hiveExpr instanceof ExprNodeColumnDesc) {
+                ExprNodeColumnDesc desc2 = (ExprNodeColumnDesc) hiveExpr;
+                String fieldName = desc2.getTabAlias() + "." + desc2.getColumn();
+
+                // System.out.println("project expr: " + fieldName);
+
+                if (fieldName.indexOf("$$") < 0) {
+                    LogicalVariable var = getVariable(fieldName, hiveExpr.getTypeInfo());
+                    desc2.setColumn(var.toString());
+                    desc2.setTabAlias("");
+                    variables.add(var);
+                } else {
+                    LogicalVariable var = nameToLogicalVariableMap.get(desc2.getColumn());
+                    String name = this.logicalVariableToFieldMap.get(var);
+                    var = this.getVariableOnly(name);
+                    variables.add(var);
+                }
+            } else {
+                Mutable<ILogicalExpression> asterixExpr = translateScalarFucntion(hiveExpr);
+                expressions.add(asterixExpr);
+                LogicalVariable var = getVariable(hiveExpr.getExprString() + asterixExpr.hashCode(),
+                        hiveExpr.getTypeInfo());
+                variables.add(var);
+                appendedVariables.add(var);
+            }
+        }
+
+        /**
+         * create an assign operator to deal with appending
+         */
+        ILogicalOperator assignOp = null;
+        if (appendedVariables.size() > 0) {
+            assignOp = new AssignOperator(appendedVariables, expressions);
+            assignOp.getInputs().add(parent);
+        }
+        return assignOp;
+    }
+
+    private ILogicalPlan plan;
+
+    public ILogicalPlan genLogicalPlan() {
+        plan = new ALogicalPlanImpl(rootOperators);
+        return plan;
+    }
+
+    public void printOperators() throws AlgebricksException {
+        LogicalOperatorPrettyPrintVisitor pvisitor = new LogicalOperatorPrettyPrintVisitor();
+        StringBuilder buffer = new StringBuilder();
+        PlanPrettyPrinter.printPlan(plan, buffer, pvisitor, 0);
+        outputWriter.println(buffer);
+        outputWriter.println("rewritten variables: ");
+        outputWriter.flush();
+        printVariables();
+
+    }
+
+    public static void setOutputPrinter(PrintWriter writer) {
+        outputWriter = writer;
+    }
+
+    private void printVariables() {
+        Set<Entry<String, LogicalVariable>> entries = fieldToLogicalVariableMap.entrySet();
+
+        for (Entry<String, LogicalVariable> entry : entries) {
+            outputWriter.println(entry.getKey() + " -> " + entry.getValue());
+        }
+        outputWriter.flush();
+    }
+
+    /**
+     * generate the object inspector for the output of an operator
+     * 
+     * @param operator
+     *            The Hive operator
+     * @return an ObjectInspector object
+     */
+    public Schema generateInputSchema(Operator operator) {
+        List<String> variableNames = new ArrayList<String>();
+        List<TypeInfo> typeList = new ArrayList<TypeInfo>();
+        List<ColumnInfo> columns = operator.getSchema().getSignature();
+
+        for (ColumnInfo col : columns) {
+            // typeList.add();
+            TypeInfo type = col.getType();
+            typeList.add(type);
+
+            String fieldName = col.getInternalName();
+            variableNames.add(fieldName);
+        }
+
+        return new Schema(variableNames, typeList);
+    }
+
+    /**
+     * rewrite the names of output columns for feature expression evaluators to
+     * use
+     * 
+     * @param operator
+     */
+    public void rewriteOperatorOutputSchema(Operator operator) {
+        List<ColumnInfo> columns = operator.getSchema().getSignature();
+        for (ColumnInfo column : columns) {
+            String columnName = column.getTabAlias() + "." + column.getInternalName();
+            if (columnName.indexOf("$$") < 0) {
+                LogicalVariable var = getVariable(columnName, column.getType());
+                column.setInternalName(var.toString());
+            }
+        }
+    }
+
+    @Override
+    public void rewriteOperatorOutputSchema(List<LogicalVariable> variables, Operator operator) {
+        // printOperatorSchema(operator);
+        List<ColumnInfo> columns = operator.getSchema().getSignature();
+        // if (variables.size() != columns.size()) {
+        // throw new IllegalStateException("output cardinality error " +
+        // operator.getName() + " variable size: "
+        // + variables.size() + " expected " + columns.size());
+        // }
+        for (int i = 0; i < variables.size(); i++) {
+            LogicalVariable var = variables.get(i);
+            ColumnInfo column = columns.get(i);
+            String fieldName = column.getTabAlias() + "." + column.getInternalName();
+            if (fieldName.indexOf("$$") < 0) {
+                updateVariable(fieldName, var);
+                column.setInternalName(var.toString());
+            }
+        }
+
+        // printOperatorSchema(operator);
+    }
+
+    /**
+     * rewrite an expression and substitute variables
+     * 
+     * @param expr
+     *            hive expression
+     */
+    public void rewriteExpression(ExprNodeDesc expr) {
+        if (expr instanceof ExprNodeColumnDesc) {
+            ExprNodeColumnDesc desc = (ExprNodeColumnDesc) expr;
+            String fieldName = desc.getTabAlias() + "." + desc.getColumn();
+            if (fieldName.indexOf("$$") < 0) {
+                LogicalVariable var = getVariableOnly(fieldName);
+                if (var == null) {
+                    fieldName = "." + desc.getColumn();
+                    var = getVariableOnly(fieldName);
+                    if (var == null) {
+                        fieldName = "null." + desc.getColumn();
+                        var = getVariableOnly(fieldName);
+                        if (var == null) {
+                            throw new IllegalStateException(fieldName + " is wrong!!! ");
+                        }
+                    }
+                }
+                String name = this.logicalVariableToFieldMap.get(var);
+                var = getVariableOnly(name);
+                desc.setColumn(var.toString());
+            }
+        } else {
+            if (expr.getChildren() != null && expr.getChildren().size() > 0) {
+                List<ExprNodeDesc> children = expr.getChildren();
+                for (ExprNodeDesc desc : children)
+                    rewriteExpression(desc);
+            }
+        }
+    }
+
+    /**
+     * rewrite an expression and substitute variables
+     * 
+     * @param expr
+     *            hive expression
+     */
+    public void rewriteExpressionPartial(ExprNodeDesc expr) {
+        if (expr instanceof ExprNodeColumnDesc) {
+            ExprNodeColumnDesc desc = (ExprNodeColumnDesc) expr;
+            String fieldName = desc.getTabAlias() + "." + desc.getColumn();
+            if (fieldName.indexOf("$$") < 0) {
+                LogicalVariable var = getVariableOnly(fieldName);
+                desc.setColumn(var.toString());
+            }
+        } else {
+            if (expr.getChildren() != null && expr.getChildren().size() > 0) {
+                List<ExprNodeDesc> children = expr.getChildren();
+                for (ExprNodeDesc desc : children)
+                    rewriteExpressionPartial(desc);
+            }
+        }
+    }
+
+    // private void printOperatorSchema(Operator operator) {
+    // // System.out.println(operator.getName());
+    // // List<ColumnInfo> columns = operator.getSchema().getSignature();
+    // // for (ColumnInfo column : columns) {
+    // // System.out.print(column.getTabAlias() + "." +
+    // // column.getInternalName() + "  ");
+    // // }
+    // // System.out.println();
+    // }
+
+    /**
+     * translate scalar function expression
+     * 
+     * @param hiveExpr
+     * @return
+     */
+    public Mutable<ILogicalExpression> translateScalarFucntion(ExprNodeDesc hiveExpr) {
+        ILogicalExpression AlgebricksExpr;
+
+        if (hiveExpr instanceof ExprNodeGenericFuncDesc) {
+            List<Mutable<ILogicalExpression>> arguments = new ArrayList<Mutable<ILogicalExpression>>();
+            List<ExprNodeDesc> children = hiveExpr.getChildren();
+
+            for (ExprNodeDesc child : children)
+                arguments.add(translateScalarFucntion(child));
+
+            ExprNodeGenericFuncDesc funcExpr = (ExprNodeGenericFuncDesc) hiveExpr;
+            GenericUDF genericUdf = funcExpr.getGenericUDF();
+            UDF udf = null;
+            if (genericUdf instanceof GenericUDFBridge) {
+                GenericUDFBridge bridge = (GenericUDFBridge) genericUdf;
+                try {
+                    udf = bridge.getUdfClass().newInstance();
+                } catch (Exception e) {
+                    e.printStackTrace();
+                }
+            }
+
+            /**
+             * set up the hive function
+             */
+            Object hiveFunction = genericUdf;
+            if (udf != null)
+                hiveFunction = udf;
+
+            FunctionIdentifier funcId = HiveAlgebricksBuiltInFunctionMap.INSTANCE.getAlgebricksFunctionId(hiveFunction
+                    .getClass());
+            if (funcId == null) {
+                funcId = new FunctionIdentifier(ExpressionConstant.NAMESPACE, hiveFunction.getClass().getName());
+            }
+
+            Object functionInfo = null;
+            if (genericUdf instanceof GenericUDFBridge) {
+                functionInfo = funcExpr;
+            }
+
+            /**
+             * generate the function call expression
+             */
+            ScalarFunctionCallExpression AlgebricksFuncExpr = new ScalarFunctionCallExpression(new HiveFunctionInfo(
+                    funcId, functionInfo), arguments);
+            AlgebricksExpr = AlgebricksFuncExpr;
+
+        } else if (hiveExpr instanceof ExprNodeColumnDesc) {
+            ExprNodeColumnDesc column = (ExprNodeColumnDesc) hiveExpr;
+            LogicalVariable var = this.getVariable(column.getColumn());
+            AlgebricksExpr = new VariableReferenceExpression(var);
+
+        } else if (hiveExpr instanceof ExprNodeFieldDesc) {
+            FunctionIdentifier funcId;
+            funcId = new FunctionIdentifier(ExpressionConstant.NAMESPACE, ExpressionConstant.FIELDACCESS);
+
+            ScalarFunctionCallExpression AlgebricksFuncExpr = new ScalarFunctionCallExpression(new HiveFunctionInfo(
+                    funcId, hiveExpr));
+            AlgebricksExpr = AlgebricksFuncExpr;
+        } else if (hiveExpr instanceof ExprNodeConstantDesc) {
+            ExprNodeConstantDesc hiveConst = (ExprNodeConstantDesc) hiveExpr;
+            Object value = hiveConst.getValue();
+            AlgebricksExpr = new ConstantExpression(new HivesterixConstantValue(value));
+        } else if (hiveExpr instanceof ExprNodeNullDesc) {
+            FunctionIdentifier funcId;
+            funcId = new FunctionIdentifier(ExpressionConstant.NAMESPACE, ExpressionConstant.NULL);
+
+            ScalarFunctionCallExpression AlgebricksFuncExpr = new ScalarFunctionCallExpression(new HiveFunctionInfo(
+                    funcId, hiveExpr));
+
+            AlgebricksExpr = AlgebricksFuncExpr;
+        } else {
+            throw new IllegalStateException("unknown hive expression");
+        }
+        return new MutableObject<ILogicalExpression>(AlgebricksExpr);
+    }
+
+    /**
+     * translate aggregation function expression
+     * 
+     * @param aggregateDesc
+     * @return
+     */
+    public Mutable<ILogicalExpression> translateAggregation(AggregationDesc aggregateDesc) {
+
+        String UDAFName = aggregateDesc.getGenericUDAFName();
+
+        List<Mutable<ILogicalExpression>> arguments = new ArrayList<Mutable<ILogicalExpression>>();
+        List<ExprNodeDesc> children = aggregateDesc.getParameters();
+
+        for (ExprNodeDesc child : children)
+            arguments.add(translateScalarFucntion(child));
+
+        FunctionIdentifier funcId = new FunctionIdentifier(ExpressionConstant.NAMESPACE, UDAFName + "("
+                + aggregateDesc.getMode() + ")");
+        HiveFunctionInfo funcInfo = new HiveFunctionInfo(funcId, aggregateDesc);
+        AggregateFunctionCallExpression aggregationExpression = new AggregateFunctionCallExpression(funcInfo, false,
+                arguments);
+        return new MutableObject<ILogicalExpression>(aggregationExpression);
+    }
+
+    /**
+     * translate aggregation function expression
+     * 
+     * @param aggregator
+     * @return
+     */
+    public Mutable<ILogicalExpression> translateUnnestFunction(UDTFDesc udtfDesc, Mutable<ILogicalExpression> argument) {
+
+        String UDTFName = udtfDesc.getUDTFName();
+
+        FunctionIdentifier funcId = new FunctionIdentifier(ExpressionConstant.NAMESPACE, UDTFName);
+        UnnestingFunctionCallExpression unnestingExpression = new UnnestingFunctionCallExpression(new HiveFunctionInfo(
+                funcId, udtfDesc));
+        unnestingExpression.getArguments().add(argument);
+        return new MutableObject<ILogicalExpression>(unnestingExpression);
+    }
+
+    /**
+     * get typeinfo
+     */
+    @Override
+    public TypeInfo getType(LogicalVariable var) {
+        return variableToType.get(var);
+    }
+
+    /**
+     * get variable from variable name
+     */
+    @Override
+    public LogicalVariable getVariable(String name) {
+        return nameToLogicalVariableMap.get(name);
+    }
+
+    @Override
+    public LogicalVariable getVariableFromFieldName(String fieldName) {
+        return this.getVariableOnly(fieldName);
+    }
+
+    /**
+     * set the metadata provider
+     */
+    @Override
+    public void setMetadataProvider(IMetadataProvider<PartitionDesc, Object> metadata) {
+        this.metaData = metadata;
+    }
+
+    /**
+     * insert ReplicateOperator when necessary
+     */
+    private void insertReplicateOperator(List<Mutable<ILogicalOperator>> roots) {
+        Map<Mutable<ILogicalOperator>, List<Mutable<ILogicalOperator>>> childToParentsMap = new HashMap<Mutable<ILogicalOperator>, List<Mutable<ILogicalOperator>>>();
+        buildChildToParentsMapping(roots, childToParentsMap);
+        for (Entry<Mutable<ILogicalOperator>, List<Mutable<ILogicalOperator>>> entry : childToParentsMap.entrySet()) {
+            List<Mutable<ILogicalOperator>> pList = entry.getValue();
+            if (pList.size() > 1) {
+                ILogicalOperator rop = new ReplicateOperator(pList.size());
+                Mutable<ILogicalOperator> ropRef = new MutableObject<ILogicalOperator>(rop);
+                Mutable<ILogicalOperator> childRef = entry.getKey();
+                rop.getInputs().add(childRef);
+                for (Mutable<ILogicalOperator> parentRef : pList) {
+                    ILogicalOperator parentOp = parentRef.getValue();
+                    int index = parentOp.getInputs().indexOf(childRef);
+                    parentOp.getInputs().set(index, ropRef);
+                }
+            }
+        }
+    }
+
+    /**
+     * build the mapping from child to Parents
+     * 
+     * @param roots
+     * @param childToParentsMap
+     */
+    private void buildChildToParentsMapping(List<Mutable<ILogicalOperator>> roots,
+            Map<Mutable<ILogicalOperator>, List<Mutable<ILogicalOperator>>> map) {
+        for (Mutable<ILogicalOperator> opRef : roots) {
+            List<Mutable<ILogicalOperator>> childRefs = opRef.getValue().getInputs();
+            for (Mutable<ILogicalOperator> childRef : childRefs) {
+                List<Mutable<ILogicalOperator>> parentList = map.get(childRef);
+                if (parentList == null) {
+                    parentList = new ArrayList<Mutable<ILogicalOperator>>();
+                    map.put(childRef, parentList);
+                }
+                if (!parentList.contains(opRef))
+                    parentList.add(opRef);
+            }
+            buildChildToParentsMapping(childRefs, map);
+        }
+    }
+}
diff --git a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/LateralViewJoinVisitor.java b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/LateralViewJoinVisitor.java
index f4161a4..aa1837c 100644
--- a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/LateralViewJoinVisitor.java
+++ b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/LateralViewJoinVisitor.java
@@ -12,113 +12,145 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.hivesterix.logical.plan.visitor;
-
-import java.util.ArrayList;
-import java.util.List;
-
-import org.apache.commons.lang3.mutable.Mutable;
-import org.apache.commons.lang3.mutable.MutableObject;
-import org.apache.hadoop.hive.ql.exec.LateralViewJoinOperator;
-import org.apache.hadoop.hive.ql.exec.Operator;
-import org.apache.hadoop.hive.ql.exec.UDTFOperator;
-import org.apache.hadoop.hive.ql.plan.UDTFDesc;
-import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
-
-import edu.uci.ics.hivesterix.logical.plan.visitor.base.DefaultVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.base.Translator;
-import edu.uci.ics.hivesterix.runtime.jobgen.Schema;
-import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable;
-import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.VariableReferenceExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnnestOperator;
-import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.visitors.VariableUtilities;
-
-/**
- * The lateral view join operator is used for FROM src LATERAL VIEW udtf()...
- * This operator was implemented with the following operator DAG in mind.
- * For a query such as
- * SELECT pageid, adid.* FROM example_table LATERAL VIEW explode(adid_list) AS
- * adid
- * The top of the operator DAG will look similar to
- * [Table Scan] | [Lateral View Forward] / \ [Select](*) [Select](adid_list) | |
- * | [UDTF] (explode) \ / [Lateral View Join] | | [Select] (pageid, adid.*) |
- * ....
- * Rows from the table scan operator are first to a lateral view forward
- * operator that just forwards the row and marks the start of a LV. The select
- * operator on the left picks all the columns while the select operator on the
- * right picks only the columns needed by the UDTF.
- * The output of select in the left branch and output of the UDTF in the right
- * branch are then sent to the lateral view join (LVJ). In most cases, the UDTF
- * will generate > 1 row for every row received from the TS, while the left
- * select operator will generate only one. For each row output from the TS, the
- * LVJ outputs all possible rows that can be created by joining the row from the
- * left select and one of the rows output from the UDTF.
- * Additional lateral views can be supported by adding a similar DAG after the
- * previous LVJ operator.
- */
-
-@SuppressWarnings("rawtypes")
-public class LateralViewJoinVisitor extends DefaultVisitor {
-
-    private UDTFDesc udtf;
-
-    private List<Mutable<ILogicalOperator>> parents = new ArrayList<Mutable<ILogicalOperator>>();
-
-    @Override
-    public Mutable<ILogicalOperator> visit(LateralViewJoinOperator operator,
-            Mutable<ILogicalOperator> AlgebricksParentOperatorRef, Translator t) throws AlgebricksException {
-
-        parents.add(AlgebricksParentOperatorRef);
-        if (operator.getParentOperators().size() > parents.size()) {
-            return null;
-        }
-
-        Operator parent0 = operator.getParentOperators().get(0);
-        ILogicalOperator parentOperator;
-        ILogicalExpression unnestArg;
-        if (parent0 instanceof UDTFOperator) {
-            List<LogicalVariable> unnestVars = new ArrayList<LogicalVariable>();
-            VariableUtilities.getLiveVariables(parents.get(1).getValue(), unnestVars);
-            unnestArg = new VariableReferenceExpression(unnestVars.get(0));
-            parentOperator = parents.get(1).getValue();
-        } else {
-            List<LogicalVariable> unnestVars = new ArrayList<LogicalVariable>();
-            VariableUtilities.getLiveVariables(parents.get(0).getValue(), unnestVars);
-            unnestArg = new VariableReferenceExpression(unnestVars.get(0));
-            parentOperator = parents.get(0).getValue();
-        }
-
-        LogicalVariable var = t.getVariable(udtf.toString(), TypeInfoFactory.unknownTypeInfo);
-
-        Mutable<ILogicalExpression> unnestExpr = t.translateUnnestFunction(udtf, new MutableObject<ILogicalExpression>(
-                unnestArg));
-        ILogicalOperator currentOperator = new UnnestOperator(var, unnestExpr);
-
-        List<LogicalVariable> outputVars = new ArrayList<LogicalVariable>();
-        VariableUtilities.getLiveVariables(parentOperator, outputVars);
-        outputVars.add(var);
-        currentOperator.getInputs().add(new MutableObject<ILogicalOperator>(parentOperator));
-
-        parents.clear();
-        udtf = null;
-        t.rewriteOperatorOutputSchema(outputVars, operator);
-        return new MutableObject<ILogicalOperator>(currentOperator);
-    }
-
-    @Override
-    public Mutable<ILogicalOperator> visit(UDTFOperator operator,
-            Mutable<ILogicalOperator> AlgebricksParentOperatorRef, Translator t) {
-        Schema currentSchema = t.generateInputSchema(operator.getParentOperators().get(0));
-        udtf = (UDTFDesc) operator.getConf();
-
-        // populate the schema from upstream operator
-        operator.setSchema(operator.getParentOperators().get(0).getSchema());
-        List<LogicalVariable> latestOutputSchema = t.getVariablesFromSchema(currentSchema);
-        t.rewriteOperatorOutputSchema(latestOutputSchema, operator);
-        return null;
-    }
-
-}
+package edu.uci.ics.hivesterix.logical.plan.visitor;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.commons.lang3.mutable.Mutable;
+import org.apache.commons.lang3.mutable.MutableObject;
+import org.apache.hadoop.hive.ql.exec.ColumnInfo;
+import org.apache.hadoop.hive.ql.exec.LateralViewJoinOperator;
+import org.apache.hadoop.hive.ql.exec.Operator;
+import org.apache.hadoop.hive.ql.exec.UDTFOperator;
+import org.apache.hadoop.hive.ql.plan.LateralViewJoinDesc;
+import org.apache.hadoop.hive.ql.plan.UDTFDesc;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
+
+import edu.uci.ics.hivesterix.logical.plan.visitor.base.DefaultVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.base.Translator;
+import edu.uci.ics.hivesterix.runtime.jobgen.Schema;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.VariableReferenceExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ProjectOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.UnnestOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.visitors.VariableUtilities;
+
+/**
+ * The lateral view join operator is used for FROM src LATERAL VIEW udtf()...
+ * This operator was implemented with the following operator DAG in mind.
+ * For a query such as
+ * SELECT pageid, adid.* FROM example_table LATERAL VIEW explode(adid_list) AS
+ * adid
+ * The top of the operator DAG will look similar to
+ * [Table Scan] | [Lateral View Forward] / \ [Select](*) [Select](adid_list) | |
+ * | [UDTF] (explode) \ / [Lateral View Join] | | [Select] (pageid, adid.*) |
+ * ....
+ * Rows from the table scan operator are first to a lateral view forward
+ * operator that just forwards the row and marks the start of a LV. The select
+ * operator on the left picks all the columns while the select operator on the
+ * right picks only the columns needed by the UDTF.
+ * The output of select in the left branch and output of the UDTF in the right
+ * branch are then sent to the lateral view join (LVJ). In most cases, the UDTF
+ * will generate > 1 row for every row received from the TS, while the left
+ * select operator will generate only one. For each row output from the TS, the
+ * LVJ outputs all possible rows that can be created by joining the row from the
+ * left select and one of the rows output from the UDTF.
+ * Additional lateral views can be supported by adding a similar DAG after the
+ * previous LVJ operator.
+ */
+
+@SuppressWarnings("rawtypes")
+public class LateralViewJoinVisitor extends DefaultVisitor {
+
+    private UDTFDesc udtf;
+
+    private List<Mutable<ILogicalOperator>> parents = new ArrayList<Mutable<ILogicalOperator>>();
+
+    @Override
+    public Mutable<ILogicalOperator> visit(LateralViewJoinOperator operator,
+            Mutable<ILogicalOperator> AlgebricksParentOperatorRef, Translator t) throws AlgebricksException {
+
+        parents.add(AlgebricksParentOperatorRef);
+        if (operator.getParentOperators().size() > parents.size()) {
+            return null;
+        }
+
+        ILogicalOperator parentOperator = null;
+        ILogicalExpression unnestArg = null;
+        List<LogicalVariable> projectVariables = new ArrayList<LogicalVariable>();
+        for (Mutable<ILogicalOperator> parentLOpRef : parents) {
+            VariableUtilities.getLiveVariables(parentLOpRef.getValue(), projectVariables);
+        }
+        for (Operator parentOp : operator.getParentOperators()) {
+            if (parentOp instanceof UDTFOperator) {
+                int index = operator.getParentOperators().indexOf(parentOp);
+                List<LogicalVariable> unnestVars = new ArrayList<LogicalVariable>();
+                VariableUtilities.getLiveVariables(parents.get(index).getValue(), unnestVars);
+                unnestArg = new VariableReferenceExpression(unnestVars.get(0));
+                parentOperator = parents.get(index).getValue();
+            }
+        }
+
+        LogicalVariable var = t.getVariable(udtf.toString(), TypeInfoFactory.unknownTypeInfo);
+        Mutable<ILogicalExpression> unnestExpr = t.translateUnnestFunction(udtf, new MutableObject<ILogicalExpression>(
+                unnestArg));
+        ILogicalOperator currentOperator = new UnnestOperator(var, unnestExpr);
+
+        List<LogicalVariable> outputVars = new ArrayList<LogicalVariable>();
+        VariableUtilities.getLiveVariables(parents.get(0).getValue(), outputVars);
+        outputVars.add(var);
+        ILogicalOperator inputProjectOperator = new ProjectOperator(projectVariables);
+        currentOperator.getInputs().add(new MutableObject<ILogicalOperator>(inputProjectOperator));
+        inputProjectOperator.getInputs().addAll(parentOperator.getInputs());
+
+        parents.clear();
+        udtf = null;
+        List<ColumnInfo> inputSchema = operator.getSchema().getSignature();
+        rewriteOperatorDesc(outputVars, operator.getConf(), inputSchema, t);
+        //t.rewriteOperatorOutputSchema(outputVars, operator);
+        return new MutableObject<ILogicalOperator>(currentOperator);
+    }
+
+    @Override
+    public Mutable<ILogicalOperator> visit(UDTFOperator operator,
+            Mutable<ILogicalOperator> AlgebricksParentOperatorRef, Translator t) {
+        Schema currentSchema = t.generateInputSchema(operator.getParentOperators().get(0));
+        udtf = (UDTFDesc) operator.getConf();
+
+        // populate the schema from upstream operator
+        operator.setSchema(operator.getParentOperators().get(0).getSchema());
+        List<LogicalVariable> latestOutputSchema = t.getVariablesFromSchema(currentSchema);
+        t.rewriteOperatorOutputSchema(latestOutputSchema, operator);
+        return null;
+    }
+
+    private void rewriteOperatorDesc(List<LogicalVariable> variables, LateralViewJoinDesc desc,
+            List<ColumnInfo> schema, Translator t) {
+        List<String> outputFieldNames = desc.getOutputInternalColNames();
+        for (int i = 0; i < variables.size(); i++) {
+            LogicalVariable var = variables.get(i);
+            String fieldName = outputFieldNames.get(i);
+            String tabAlias = findTabAlias(fieldName, schema);
+            fieldName = tabAlias + "." + fieldName;
+            if (fieldName.indexOf("$$") < 0) {
+                //outputFieldNames.set(i, var.toString());
+                t.updateVariable(fieldName, var);
+            }
+        }
+    }
+
+    private String findTabAlias(String fieldName, List<ColumnInfo> schema) {
+        for (int i = 0; i < schema.size(); i++) {
+            ColumnInfo column = schema.get(i);
+            if (column.getInternalName().equals(fieldName)) {
+                return column.getTabAlias();
+            }
+        }
+        return "null";
+    }
+
+}
diff --git a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/MapJoinVisitor.java b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/MapJoinVisitor.java
index 186b291..3ed9786 100644
--- a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/MapJoinVisitor.java
+++ b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/MapJoinVisitor.java
@@ -14,36 +14,36 @@
  */
 package edu.uci.ics.hivesterix.logical.plan.visitor;
 
-import java.io.Serializable;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.Iterator;
-import java.util.List;
-import java.util.Map;
-import java.util.Map.Entry;
-import java.util.Set;
-
-import org.apache.commons.lang3.mutable.Mutable;
-import org.apache.commons.lang3.mutable.MutableObject;
-import org.apache.hadoop.hive.ql.exec.ColumnInfo;
-import org.apache.hadoop.hive.ql.exec.MapJoinOperator;
-import org.apache.hadoop.hive.ql.exec.Operator;
-import org.apache.hadoop.hive.ql.plan.ExprNodeConstantDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc;
-import org.apache.hadoop.hive.ql.plan.MapJoinDesc;
-import org.apache.hadoop.hive.ql.udf.generic.GenericUDFOPAnd;
-import org.apache.hadoop.hive.ql.udf.generic.GenericUDFOPEqual;
-import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
-import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
-
-import edu.uci.ics.hivesterix.logical.plan.visitor.base.DefaultVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.base.Translator;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable;
-import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.InnerJoinOperator;
-import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ProjectOperator;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+
+import org.apache.commons.lang3.mutable.Mutable;
+import org.apache.commons.lang3.mutable.MutableObject;
+import org.apache.hadoop.hive.ql.exec.ColumnInfo;
+import org.apache.hadoop.hive.ql.exec.MapJoinOperator;
+import org.apache.hadoop.hive.ql.exec.Operator;
+import org.apache.hadoop.hive.ql.plan.ExprNodeConstantDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc;
+import org.apache.hadoop.hive.ql.plan.MapJoinDesc;
+import org.apache.hadoop.hive.ql.plan.OperatorDesc;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDFOPAnd;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDFOPEqual;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
+
+import edu.uci.ics.hivesterix.logical.plan.visitor.base.DefaultVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.base.Translator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.InnerJoinOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.ProjectOperator;
 
 @SuppressWarnings("rawtypes")
 public class MapJoinVisitor extends DefaultVisitor {
@@ -56,7 +56,7 @@
     @Override
     public Mutable<ILogicalOperator> visit(MapJoinOperator operator,
             Mutable<ILogicalOperator> AlgebricksParentOperatorRef, Translator t) {
-        List<Operator<? extends Serializable>> joinSrc = operator.getParentOperators();
+        List<Operator<? extends OperatorDesc>> joinSrc = operator.getParentOperators();
         List<Mutable<ILogicalOperator>> parents = opMap.get(operator);
         if (parents == null) {
             parents = new ArrayList<Mutable<ILogicalOperator>>();
diff --git a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/TableScanWriteVisitor.java b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/TableScanWriteVisitor.java
index 74cebaa..25abdec 100644
--- a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/TableScanWriteVisitor.java
+++ b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/TableScanWriteVisitor.java
@@ -69,9 +69,9 @@
 
     @Override
     public Mutable<ILogicalOperator> visit(TableScanOperator operator,
-            Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t) throws AlgebricksException {
+            Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t) throws AlgebricksException {    	
         TableScanDesc desc = (TableScanDesc) operator.getConf();
-        if (desc == null) {
+        if (desc == null || desc.getAlias()==null) {
             List<LogicalVariable> schema = new ArrayList<LogicalVariable>();
             VariableUtilities.getLiveVariables(AlgebricksParentOperator.getValue(), schema);
             t.rewriteOperatorOutputSchema(schema, operator);
@@ -124,7 +124,6 @@
     @Override
     public Mutable<ILogicalOperator> visit(FileSinkOperator hiveOperator,
             Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t) {
-
         if (hiveOperator.getChildOperators() != null && hiveOperator.getChildOperators().size() > 0)
             return null;
 
diff --git a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/UnionVisitor.java b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/UnionVisitor.java
index 1cb5121..c710f3f 100644
--- a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/UnionVisitor.java
+++ b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/UnionVisitor.java
@@ -14,21 +14,21 @@
  */
 package edu.uci.ics.hivesterix.logical.plan.visitor;
 
-import java.util.ArrayList;
-import java.util.List;
-
-import org.apache.commons.lang3.mutable.Mutable;
-import org.apache.commons.lang3.mutable.MutableObject;
-import org.apache.hadoop.hive.ql.exec.UnionOperator;
-import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
-
-import edu.uci.ics.hivesterix.logical.plan.visitor.base.DefaultVisitor;
-import edu.uci.ics.hivesterix.logical.plan.visitor.base.Translator;
-import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
-import edu.uci.ics.hyracks.algebricks.common.utils.Triple;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable;
-import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.visitors.VariableUtilities;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.commons.lang3.mutable.Mutable;
+import org.apache.commons.lang3.mutable.MutableObject;
+import org.apache.hadoop.hive.ql.exec.UnionOperator;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
+
+import edu.uci.ics.hivesterix.logical.plan.visitor.base.DefaultVisitor;
+import edu.uci.ics.hivesterix.logical.plan.visitor.base.Translator;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.common.utils.Triple;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable;
+import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.visitors.VariableUtilities;
 
 public class UnionVisitor extends DefaultVisitor {
 
@@ -46,8 +46,8 @@
         List<LogicalVariable> leftVars = new ArrayList<LogicalVariable>();
         List<LogicalVariable> rightVars = new ArrayList<LogicalVariable>();
 
-        VariableUtilities.getUsedVariables(parents.get(0).getValue(), leftVars);
-        VariableUtilities.getUsedVariables(parents.get(1).getValue(), rightVars);
+        VariableUtilities.getLiveVariables(parents.get(0).getValue(), leftVars);
+        VariableUtilities.getLiveVariables(parents.get(1).getValue(), rightVars);
 
         List<Triple<LogicalVariable, LogicalVariable, LogicalVariable>> triples = new ArrayList<Triple<LogicalVariable, LogicalVariable, LogicalVariable>>();
         List<LogicalVariable> unionVars = new ArrayList<LogicalVariable>();
diff --git a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/base/Translator.java b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/base/Translator.java
index 32b0f66..5b6ac50 100644
--- a/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/base/Translator.java
+++ b/hivesterix/hivesterix-translator/src/main/java/edu/uci/ics/hivesterix/logical/plan/visitor/base/Translator.java
@@ -12,173 +12,181 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package edu.uci.ics.hivesterix.logical.plan.visitor.base;
-
-import java.util.ArrayList;
-import java.util.List;
-
-import org.apache.commons.lang3.mutable.Mutable;
-import org.apache.hadoop.hive.ql.exec.Operator;
-import org.apache.hadoop.hive.ql.plan.AggregationDesc;
-import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
-import org.apache.hadoop.hive.ql.plan.PartitionDesc;
-import org.apache.hadoop.hive.ql.plan.UDTFDesc;
-import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
-
-import edu.uci.ics.hivesterix.runtime.jobgen.Schema;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable;
-import edu.uci.ics.hyracks.algebricks.core.algebra.metadata.IMetadataProvider;
-
-@SuppressWarnings("rawtypes")
-public interface Translator {
-
-    /**
-     * generate input schema
-     * 
-     * @param operator
-     * @return
-     */
-    public Schema generateInputSchema(Operator operator);
-
-    /**
-     * rewrite the names of output columns for feture expression evaluators to
-     * use
-     * 
-     * @param operator
-     */
-    public void rewriteOperatorOutputSchema(List<LogicalVariable> vars, Operator operator);
-
-    /**
-     * rewrite the names of output columns for feture expression evaluators to
-     * use
-     * 
-     * @param operator
-     */
-    public void rewriteOperatorOutputSchema(Operator operator);
-
-    /**
-     * rewrite an expression and substitute variables
-     * 
-     * @param expr
-     *            hive expression
-     */
-    public void rewriteExpression(ExprNodeDesc expr);
-
-    /**
-     * rewrite an expression and substitute variables
-     * 
-     * @param expr
-     *            hive expression
-     */
-    public void rewriteExpressionPartial(ExprNodeDesc expr);
-
-    /**
-     * get an assign operator as a child of parent
-     * 
-     * @param parent
-     * @param cols
-     * @param variables
-     * @return
-     */
-    public ILogicalOperator getAssignOperator(Mutable<ILogicalOperator> parent, List<ExprNodeDesc> cols,
-            ArrayList<LogicalVariable> variables);
-
-    /**
-     * get type for a logical variable
-     * 
-     * @param var
-     * @return type info
-     */
-    public TypeInfo getType(LogicalVariable var);
-
-    /**
-     * translate an expression from hive to Algebricks
-     * 
-     * @param desc
-     * @return
-     */
-    public Mutable<ILogicalExpression> translateScalarFucntion(ExprNodeDesc desc);
-
-    /**
-     * translate an aggregation from hive to Algebricks
-     * 
-     * @param aggregateDesc
-     * @return
-     */
-    public Mutable<ILogicalExpression> translateAggregation(AggregationDesc aggregateDesc);
-
-    /**
-     * translate unnesting (UDTF) function expression
-     * 
-     * @param aggregator
-     * @return
-     */
-    public Mutable<ILogicalExpression> translateUnnestFunction(UDTFDesc udtfDesc, Mutable<ILogicalExpression> argument);
-
-    /**
-     * get variable from a schema
-     * 
-     * @param schema
-     * @return
-     */
-    public List<LogicalVariable> getVariablesFromSchema(Schema schema);
-
-    /**
-     * get variable from name
-     * 
-     * @param name
-     * @return
-     */
-    public LogicalVariable getVariable(String name);
-
-    /**
-     * get variable from field name
-     * 
-     * @param name
-     * @return
-     */
-    public LogicalVariable getVariableFromFieldName(String name);
-
-    /**
-     * get variable from name, type
-     * 
-     * @param fieldName
-     * @param type
-     * @return
-     */
-    public LogicalVariable getVariable(String fieldName, TypeInfo type);
-
-    /**
-     * get new variable from name, type
-     * 
-     * @param fieldName
-     * @param type
-     * @return
-     */
-    public LogicalVariable getNewVariable(String fieldName, TypeInfo type);
-
-    /**
-     * set the metadata provider
-     * 
-     * @param metadata
-     */
-    public void setMetadataProvider(IMetadataProvider<PartitionDesc, Object> metadata);
-
-    /**
-     * get the metadata provider
-     * 
-     * @param metadata
-     */
-    public IMetadataProvider<PartitionDesc, Object> getMetadataProvider();
-
-    /**
-     * replace the variable
-     * 
-     * @param oldVar
-     * @param newVar
-     */
-    public void replaceVariable(LogicalVariable oldVar, LogicalVariable newVar);
-
-}
+package edu.uci.ics.hivesterix.logical.plan.visitor.base;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.commons.lang3.mutable.Mutable;
+import org.apache.hadoop.hive.ql.exec.Operator;
+import org.apache.hadoop.hive.ql.plan.AggregationDesc;
+import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
+import org.apache.hadoop.hive.ql.plan.PartitionDesc;
+import org.apache.hadoop.hive.ql.plan.UDTFDesc;
+import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
+
+import edu.uci.ics.hivesterix.runtime.jobgen.Schema;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalVariable;
+import edu.uci.ics.hyracks.algebricks.core.algebra.metadata.IMetadataProvider;
+
+@SuppressWarnings("rawtypes")
+public interface Translator {
+
+    /**
+     * generate input schema
+     * 
+     * @param operator
+     * @return
+     */
+    public Schema generateInputSchema(Operator operator);
+
+    /**
+     * rewrite the names of output columns for feture expression evaluators to
+     * use
+     * 
+     * @param operator
+     */
+    public void rewriteOperatorOutputSchema(List<LogicalVariable> vars, Operator operator);
+
+    /**
+     * rewrite the names of output columns for feture expression evaluators to
+     * use
+     * 
+     * @param operator
+     */
+    public void rewriteOperatorOutputSchema(Operator operator);
+
+    /**
+     * rewrite an expression and substitute variables
+     * 
+     * @param expr
+     *            hive expression
+     */
+    public void rewriteExpression(ExprNodeDesc expr);
+
+    /**
+     * rewrite an expression and substitute variables
+     * 
+     * @param expr
+     *            hive expression
+     */
+    public void rewriteExpressionPartial(ExprNodeDesc expr);
+
+    /**
+     * get an assign operator as a child of parent
+     * 
+     * @param parent
+     * @param cols
+     * @param variables
+     * @return
+     */
+    public ILogicalOperator getAssignOperator(Mutable<ILogicalOperator> parent, List<ExprNodeDesc> cols,
+            ArrayList<LogicalVariable> variables);
+
+    /**
+     * get type for a logical variable
+     * 
+     * @param var
+     * @return type info
+     */
+    public TypeInfo getType(LogicalVariable var);
+
+    /**
+     * translate an expression from hive to Algebricks
+     * 
+     * @param desc
+     * @return
+     */
+    public Mutable<ILogicalExpression> translateScalarFucntion(ExprNodeDesc desc);
+
+    /**
+     * translate an aggregation from hive to Algebricks
+     * 
+     * @param aggregateDesc
+     * @return
+     */
+    public Mutable<ILogicalExpression> translateAggregation(AggregationDesc aggregateDesc);
+
+    /**
+     * translate unnesting (UDTF) function expression
+     * 
+     * @param aggregator
+     * @return
+     */
+    public Mutable<ILogicalExpression> translateUnnestFunction(UDTFDesc udtfDesc, Mutable<ILogicalExpression> argument);
+
+    /**
+     * get variable from a schema
+     * 
+     * @param schema
+     * @return
+     */
+    public List<LogicalVariable> getVariablesFromSchema(Schema schema);
+
+    /**
+     * get variable from name
+     * 
+     * @param name
+     * @return
+     */
+    public LogicalVariable getVariable(String name);
+
+    /**
+     * get variable from field name
+     * 
+     * @param name
+     * @return
+     */
+    public LogicalVariable getVariableFromFieldName(String name);
+
+    /**
+     * get variable from name, type
+     * 
+     * @param fieldName
+     * @param type
+     * @return
+     */
+    public LogicalVariable getVariable(String fieldName, TypeInfo type);
+
+    /**
+     * get new variable from name, type
+     * 
+     * @param fieldName
+     * @param type
+     * @return
+     */
+    public LogicalVariable getNewVariable(String fieldName, TypeInfo type);
+
+    /**
+     * update a name-variable binding
+     * 
+     * @param fieldName
+     * @param variable
+     */
+    public void updateVariable(String fieldName, LogicalVariable variable);
+
+    /**
+     * set the metadata provider
+     * 
+     * @param metadata
+     */
+    public void setMetadataProvider(IMetadataProvider<PartitionDesc, Object> metadata);
+
+    /**
+     * get the metadata provider
+     * 
+     * @param metadata
+     */
+    public IMetadataProvider<PartitionDesc, Object> getMetadataProvider();
+
+    /**
+     * replace the variable
+     * 
+     * @param oldVar
+     * @param newVar
+     */
+    public void replaceVariable(LogicalVariable oldVar, LogicalVariable newVar);
+
+}