diff --git a/asterixdb/asterix-app/src/main/java/org/apache/asterix/api/http/server/QueryServiceRequestParameters.java b/asterixdb/asterix-app/src/main/java/org/apache/asterix/api/http/server/QueryServiceRequestParameters.java
index 16a2105..e0af3bd 100644
--- a/asterixdb/asterix-app/src/main/java/org/apache/asterix/api/http/server/QueryServiceRequestParameters.java
+++ b/asterixdb/asterix-app/src/main/java/org/apache/asterix/api/http/server/QueryServiceRequestParameters.java
@@ -44,6 +44,7 @@
     private String planFormat;
     private Map<String, JsonNode> statementParams;
     private boolean expressionTree;
+    private boolean parseOnly; //don't execute; simply check for syntax correctness and named parameters.
     private boolean rewrittenExpressionTree;
     private boolean logicalPlan;
     private boolean optimizedLogicalPlan;
@@ -171,6 +172,14 @@
         this.optimizedLogicalPlan = optimizedLogicalPlan;
     }
 
+    public void setParseOnly(boolean parseOnly) {
+        this.parseOnly = parseOnly;
+    }
+
+    public boolean isParseOnly() {
+        return parseOnly;
+    }
+
     public boolean isJob() {
         return job;
     }
diff --git a/asterixdb/asterix-app/src/main/java/org/apache/asterix/api/http/server/QueryServiceServlet.java b/asterixdb/asterix-app/src/main/java/org/apache/asterix/api/http/server/QueryServiceServlet.java
index 7e563e17..fce9365 100644
--- a/asterixdb/asterix-app/src/main/java/org/apache/asterix/api/http/server/QueryServiceServlet.java
+++ b/asterixdb/asterix-app/src/main/java/org/apache/asterix/api/http/server/QueryServiceServlet.java
@@ -33,23 +33,29 @@
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 import java.util.concurrent.ConcurrentMap;
 import java.util.function.BiFunction;
 import java.util.function.Function;
 
 import org.apache.asterix.algebra.base.ILangExtension;
+import org.apache.asterix.app.translator.QueryTranslator;
 import org.apache.asterix.common.api.Duration;
 import org.apache.asterix.common.api.IApplicationContext;
 import org.apache.asterix.common.api.IClusterManagementWork;
 import org.apache.asterix.common.config.GlobalConfig;
 import org.apache.asterix.common.context.IStorageComponentProvider;
 import org.apache.asterix.common.dataflow.ICcApplicationContext;
+import org.apache.asterix.common.exceptions.CompilationException;
 import org.apache.asterix.common.exceptions.ErrorCode;
 import org.apache.asterix.common.exceptions.RuntimeDataException;
 import org.apache.asterix.compiler.provider.ILangCompilationProvider;
 import org.apache.asterix.lang.aql.parser.TokenMgrError;
 import org.apache.asterix.lang.common.base.IParser;
+import org.apache.asterix.lang.common.base.IParserFactory;
 import org.apache.asterix.lang.common.base.Statement;
+import org.apache.asterix.lang.common.expression.VariableExpr;
+import org.apache.asterix.lang.common.statement.Query;
 import org.apache.asterix.metadata.MetadataManager;
 import org.apache.asterix.om.base.IAObject;
 import org.apache.asterix.translator.ExecutionPlans;
@@ -141,6 +147,7 @@
         REWRITTEN_EXPRESSION_TREE("rewritten-expression-tree"),
         LOGICAL_PLAN("logical-plan"),
         OPTIMIZED_LOGICAL_PLAN("optimized-logical-plan"),
+        PARSE_ONLY("parse-only"),
         JOB("job"),
         SIGNATURE("signature"),
         MULTI_STATEMENT("multi-statement");
@@ -411,6 +418,7 @@
         param.setExpressionTree(getOptBoolean(jsonRequest, Parameter.EXPRESSION_TREE.str(), false));
         param.setRewrittenExpressionTree(getOptBoolean(jsonRequest, Parameter.REWRITTEN_EXPRESSION_TREE.str(), false));
         param.setLogicalPlan(getOptBoolean(jsonRequest, Parameter.LOGICAL_PLAN.str(), false));
+        param.setParseOnly(getOptBoolean(jsonRequest, Parameter.PARSE_ONLY.str(), false));
         param.setOptimizedLogicalPlan(getOptBoolean(jsonRequest, Parameter.OPTIMIZED_LOGICAL_PLAN.str(), false));
         param.setJob(getOptBoolean(jsonRequest, Parameter.JOB.str(), false));
         param.setSignature(getOptBoolean(jsonRequest, Parameter.SIGNATURE.str(), true));
@@ -435,6 +443,7 @@
         param.setTimeout(request.getParameter(Parameter.TIMEOUT.str()));
         param.setMaxResultReads(request.getParameter(Parameter.MAX_RESULT_READS.str()));
         param.setPlanFormat(request.getParameter(Parameter.PLAN_FORMAT.str()));
+        param.setParseOnly(Boolean.parseBoolean(request.getParameter(Parameter.PARSE_ONLY.str())));
         final String multiStatementParam = request.getParameter(Parameter.MULTI_STATEMENT.str());
         param.setMultiStatement(multiStatementParam == null || Boolean.parseBoolean(multiStatementParam));
         try {
@@ -445,6 +454,14 @@
         }
     }
 
+    private void setAccessControlHeaders(IServletRequest request, IServletResponse response) throws IOException {
+        //CORS
+        if (request.getHeader("Origin") != null) {
+            response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin"));
+        }
+        response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
+    }
+
     private static ResultDelivery parseResultDelivery(String mode) {
         if ("async".equals(mode)) {
             return ResultDelivery.ASYNC;
@@ -506,29 +523,36 @@
             LOGGER.info("handleRequest: {}", param);
             ResultDelivery delivery = parseResultDelivery(param.getMode());
             setSessionConfig(sessionOutput, param, delivery);
-            ResultProperties resultProperties = param.getMaxResultReads() == null ? new ResultProperties(delivery)
+            final ResultProperties resultProperties = param.getMaxResultReads() == null ? new ResultProperties(delivery)
                     : new ResultProperties(delivery, Long.parseLong(param.getMaxResultReads()));
             printAdditionalResultFields(sessionOutput.out());
             printRequestId(sessionOutput.out());
             printClientContextID(sessionOutput.out(), param);
-            printSignature(sessionOutput.out(), param);
+            if (!param.isParseOnly()) {
+                printSignature(sessionOutput.out(), param);
+            }
             printType(sessionOutput.out(), sessionOutput.config());
             if (param.getStatement() == null || param.getStatement().isEmpty()) {
                 throw new RuntimeDataException(ErrorCode.NO_STATEMENT_PROVIDED);
             }
             String statementsText = param.getStatement() + ";";
-            Map<String, byte[]> statementParams = org.apache.asterix.app.translator.RequestParameters
-                    .serializeParameterValues(param.getStatementParams());
-            // CORS
-            if (request.getHeader("Origin") != null) {
-                response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin"));
-            }
-            response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
-            response.setStatus(execution.getHttpStatus());
-            executeStatement(statementsText, sessionOutput, resultProperties, stats, param, execution, optionalParams,
-                    statementParams);
-            if (ResultDelivery.IMMEDIATE == delivery || ResultDelivery.DEFERRED == delivery) {
+            if (param.isParseOnly()) {
+                ResultUtil.ParseOnlyResult parseOnlyResult = parseStatement(statementsText);
+                setAccessControlHeaders(request, response);
+                response.setStatus(HttpResponseStatus.OK);
+                printParseOnlyValueResult(sessionOutput, parseOnlyResult);
                 ResultUtil.printStatus(sessionOutput, execution.getResultStatus());
+            } else {
+                Map<String, byte[]> statementParams = org.apache.asterix.app.translator.RequestParameters
+                        .serializeParameterValues(param.getStatementParams());
+
+                setAccessControlHeaders(request, response);
+                response.setStatus(execution.getHttpStatus());
+                executeStatement(statementsText, sessionOutput, resultProperties, stats, param, execution,
+                        optionalParams, statementParams);
+                if (ResultDelivery.IMMEDIATE == delivery || ResultDelivery.DEFERRED == delivery) {
+                    ResultUtil.printStatus(sessionOutput, execution.getResultStatus());
+                }
             }
             if (!warnings.isEmpty()) {
                 printWarnings(sessionOutput.out(), warnings);
@@ -553,6 +577,18 @@
         }
     }
 
+    protected ResultUtil.ParseOnlyResult parseStatement(String statementsText) throws CompilationException {
+        IParserFactory factory = compilationProvider.getParserFactory();
+        IParser parser = factory.createParser(statementsText);
+        List<Statement> stmts = parser.parse();
+        QueryTranslator.validateStatements(stmts);
+        Query query = (Query) stmts.get(stmts.size() - 1);
+        Set<VariableExpr> extVars =
+                compilationProvider.getRewriterFactory().createQueryRewriter().getExternalVariables(query.getBody());
+        ResultUtil.ParseOnlyResult parseOnlyResult = new ResultUtil.ParseOnlyResult(extVars);
+        return parseOnlyResult;
+    }
+
     protected void executeStatement(String statementsText, SessionOutput sessionOutput,
             ResultProperties resultProperties, Stats stats, QueryServiceRequestParameters param,
             RequestExecutionState execution, Map<String, String> optionalParameters,
@@ -646,10 +682,19 @@
         // do nothing
     }
 
-    private void printWarnings(PrintWriter pw, List<ExecutionWarning> warnings) {
+    protected void printWarnings(PrintWriter pw, List<ExecutionWarning> warnings) {
         ResultUtil.printWarnings(pw, warnings);
     }
 
+    protected void printParseOnlyValueResult(SessionOutput output, ResultUtil.ParseOnlyResult parseOnlyResult) {
+        final PrintWriter pw = output.out();
+        pw.print("\t\"");
+        pw.print(ResultFields.RESULTS.str()); //TODO: use ResultUtil, ResultPrinter
+        pw.print("\":");
+        pw.print(parseOnlyResult.asJson());
+        pw.print(",\n");
+    }
+
     protected void printExecutionPlans(SessionOutput output, ExecutionPlans executionPlans) {
         final PrintWriter pw = output.out();
         pw.print("\t\"");
diff --git a/asterixdb/asterix-app/src/main/java/org/apache/asterix/api/http/server/ResultUtil.java b/asterixdb/asterix-app/src/main/java/org/apache/asterix/api/http/server/ResultUtil.java
index 8824f6a..fa3c03d 100644
--- a/asterixdb/asterix-app/src/main/java/org/apache/asterix/api/http/server/ResultUtil.java
+++ b/asterixdb/asterix-app/src/main/java/org/apache/asterix/api/http/server/ResultUtil.java
@@ -24,9 +24,11 @@
 import java.io.InputStreamReader;
 import java.io.PrintWriter;
 import java.io.StringWriter;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
+import java.util.Set;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -35,6 +37,8 @@
 import org.apache.asterix.app.result.ResultReader;
 import org.apache.asterix.common.api.IApplicationContext;
 import org.apache.asterix.lang.aql.parser.TokenMgrError;
+import org.apache.asterix.lang.common.expression.VariableExpr;
+import org.apache.asterix.lang.sqlpp.util.SqlppVariableUtil;
 import org.apache.asterix.om.types.ARecordType;
 import org.apache.asterix.translator.IStatementExecutor.Stats;
 import org.apache.asterix.translator.SessionOutput;
@@ -379,4 +383,52 @@
         return (app, status) -> app.append("\t\"").append(AbstractQueryApiServlet.ResultFields.STATUS.str())
                 .append("\": \"").append(status).append("\",\n");
     }
+
+    public static class ParseOnlyResult {
+        private Set<VariableExpr> externalVariables;
+
+        private static final String STMT_PARAM_LBL = "statement-parameters";
+
+        public ParseOnlyResult(Set<VariableExpr> extVars) {
+            this.externalVariables = extVars;
+        }
+
+        public String asJson() {
+
+            ArrayList<String> positionalVars = new ArrayList<>();
+            ArrayList<String> namedVars = new ArrayList<>();
+
+            for (VariableExpr extVarRef : externalVariables) {
+                String varname = extVarRef.getVar().getValue();
+                if (SqlppVariableUtil.isPositionalVariableIdentifier(extVarRef.getVar())) {
+                    positionalVars.add(SqlppVariableUtil.toUserDefinedName(varname));
+                } else {
+                    namedVars.add(SqlppVariableUtil.toUserDefinedName(varname));
+                }
+            }
+            Collections.sort(positionalVars);
+            Collections.sort(namedVars);
+            final StringBuilder output = new StringBuilder();
+            output.append("{\"").append(STMT_PARAM_LBL).append("\":[");
+            boolean first = true;
+            for (String posVar : positionalVars) {
+                if (first) {
+                    first = false;
+                } else {
+                    output.append(",");
+                }
+                output.append(posVar);
+            }
+            for (String namedVar : namedVars) {
+                if (first) {
+                    first = false;
+                } else {
+                    output.append(",");
+                }
+                output.append("\"").append(namedVar).append("\"");
+            }
+            output.append("]}");
+            return output.toString();
+        }
+    }
 }
diff --git a/asterixdb/asterix-app/src/main/java/org/apache/asterix/app/translator/QueryTranslator.java b/asterixdb/asterix-app/src/main/java/org/apache/asterix/app/translator/QueryTranslator.java
index 9139d14..64a3d51 100644
--- a/asterixdb/asterix-app/src/main/java/org/apache/asterix/app/translator/QueryTranslator.java
+++ b/asterixdb/asterix-app/src/main/java/org/apache/asterix/app/translator/QueryTranslator.java
@@ -65,7 +65,6 @@
 import org.apache.asterix.common.exceptions.CompilationException;
 import org.apache.asterix.common.exceptions.ErrorCode;
 import org.apache.asterix.common.exceptions.MetadataException;
-import org.apache.asterix.common.exceptions.RuntimeDataException;
 import org.apache.asterix.common.functions.FunctionSignature;
 import org.apache.asterix.common.utils.JobUtils;
 import org.apache.asterix.common.utils.JobUtils.ProgressState;
@@ -2932,13 +2931,13 @@
         }
     }
 
-    protected void validateStatements(List<Statement> statements) throws RuntimeDataException {
-        if (statements.stream().filter(this::isNotAllowedMultiStatement).count() > 1) {
-            throw new RuntimeDataException(ErrorCode.UNSUPPORTED_MULTIPLE_STATEMENTS);
+    public static void validateStatements(List<Statement> statements) throws CompilationException {
+        if (statements.stream().filter(QueryTranslator::isNotAllowedMultiStatement).count() > 1) {
+            throw new CompilationException(ErrorCode.UNSUPPORTED_MULTIPLE_STATEMENTS);
         }
     }
 
-    protected boolean isNotAllowedMultiStatement(Statement statement) {
+    protected static boolean isNotAllowedMultiStatement(Statement statement) {
         switch (statement.getKind()) {
             case DATAVERSE_DECL:
             case FUNCTION_DECL:
diff --git a/asterixdb/asterix-app/src/test/java/org/apache/asterix/test/common/TestExecutor.java b/asterixdb/asterix-app/src/test/java/org/apache/asterix/test/common/TestExecutor.java
index bd7510f..3aa8807 100644
--- a/asterixdb/asterix-app/src/test/java/org/apache/asterix/test/common/TestExecutor.java
+++ b/asterixdb/asterix-app/src/test/java/org/apache/asterix/test/common/TestExecutor.java
@@ -132,7 +132,7 @@
     private static final Pattern HANDLE_VARIABLE_PATTERN = Pattern.compile("handlevariable=(\\w+)");
     private static final Pattern VARIABLE_REF_PATTERN = Pattern.compile("\\$(\\w+)");
     private static final Pattern HTTP_PARAM_PATTERN =
-            Pattern.compile("param (?<name>[\\w$]+)(?::(?<type>\\w+))?=(?<value>.*)", Pattern.MULTILINE);
+            Pattern.compile("param (?<name>[\\w-$]+)(?::(?<type>\\w+))?=(?<value>.*)", Pattern.MULTILINE);
     private static final Pattern HTTP_BODY_PATTERN = Pattern.compile("body=(.*)", Pattern.MULTILINE);
     private static final Pattern HTTP_STATUSCODE_PATTERN = Pattern.compile("statuscode (.*)", Pattern.MULTILINE);
     private static final Pattern MAX_RESULT_READS_PATTERN =
@@ -890,6 +890,7 @@
                 break;
             case "query":
             case "async":
+            case "parse":
             case "deferred":
             case "metrics":
                 // isDmlRecoveryTest: insert Crash and Recovery
@@ -1220,8 +1221,14 @@
         if (DELIVERY_IMMEDIATE.equals(delivery)) {
             resultStream =
                     executeQueryService(statement, fmt, uri, params, isJsonEncoded, null, isCancellable(reqType));
-            resultStream = METRICS_QUERY_TYPE.equals(reqType) ? ResultExtractor.extractMetrics(resultStream)
-                    : ResultExtractor.extract(resultStream);
+            switch (reqType) {
+                case METRICS_QUERY_TYPE:
+                    resultStream = ResultExtractor.extractMetrics(resultStream);
+                    break;
+                default:
+                    resultStream = ResultExtractor.extract(resultStream);
+                    break;
+            }
         } else {
             String handleVar = getHandleVariable(statement);
             resultStream = executeQueryService(statement, fmt, uri,
diff --git a/asterixdb/asterix-app/src/test/java/org/apache/asterix/test/runtime/ParseOnlyTest.java b/asterixdb/asterix-app/src/test/java/org/apache/asterix/test/runtime/ParseOnlyTest.java
new file mode 100644
index 0000000..92edf47
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/java/org/apache/asterix/test/runtime/ParseOnlyTest.java
@@ -0,0 +1,65 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 at
+ *
+ *   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.
+ */
+package org.apache.asterix.test.runtime;
+
+import java.util.Collection;
+
+import org.apache.asterix.test.common.TestExecutor;
+
+import org.apache.asterix.testframework.context.TestCaseContext;
+
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameters;
+
+@RunWith(Parameterized.class)
+public class ParseOnlyTest {
+
+    protected static final String TEST_CONFIG_FILE_NAME = "src/main/resources/cc.conf";
+
+    @BeforeClass
+    public static void setUp() throws Exception {
+        LangExecutionUtil.setUp(TEST_CONFIG_FILE_NAME, new TestExecutor());
+    }
+
+    @AfterClass
+    public static void tearDown() throws Exception {
+        LangExecutionUtil.tearDown();
+    }
+
+    @Parameters(name = "ParseOnlyTest {index}: {0}")
+    public static Collection<Object[]> tests() throws Exception {
+        return LangExecutionUtil.tests("only.xml", "testsuite_parseonly.xml");
+    }
+
+    protected TestCaseContext tcCtx;
+
+    public ParseOnlyTest(TestCaseContext tcCtx) {
+        this.tcCtx = tcCtx;
+    }
+
+    @Test
+    public void test() throws Exception {
+        LangExecutionUtil.test(tcCtx);
+    }
+
+}
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries/parseonly/001/parseonly_01.1.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries/parseonly/001/parseonly_01.1.query.sqlpp
new file mode 100644
index 0000000..e24410f
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries/parseonly/001/parseonly_01.1.query.sqlpp
@@ -0,0 +1,28 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 at
+ *
+ *   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.
+ */
+
+/*
+ * Description  : Test named statement parameters with json encoded request
+ * Expected Res : Success
+ * Date         : Jun 2018
+ */
+
+-- param parse-only:string=true
+
+select count(*) from ChirpUsers where name=$qname;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries/parseonly/001/parseonly_01.2.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries/parseonly/001/parseonly_01.2.query.sqlpp
new file mode 100644
index 0000000..ce0bf45
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries/parseonly/001/parseonly_01.2.query.sqlpp
@@ -0,0 +1,54 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 at
+ *
+ *   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.
+ */
+
+/*
+ * Description  : Test named statement parameters with json encoded request
+ * Expected Res : Success
+ * Date         : Jun 2018
+ */
+
+-- param parse-only:string=true
+
+// requesttype=application/json
+
+{
+  "t1": {
+    "p_null": $p_null,
+    "p_bool": $p_bool,
+    "p_int": $p_int,
+    "p_dec": $p_dec,
+    "p_dbl": $p_dbl,
+    "p_str": $p_str,
+    "p_arr": $p_arr,
+    "p_obj": $p_obj
+  },
+
+  "t2": {
+    "p_null_type": $p_null is null,
+    "p_bool_type": is_boolean($p_bool),
+    "p_int_type": is_number($p_int),
+    "p_dec_type": is_number($p_dec),
+    "p_dbl_type": is_number($p_dbl),
+    "p_str_type": is_string($p_str),
+    "p_arr_type": is_array($p_arr),
+    "p_obj_type": is_object($p_obj)
+  },
+
+  "t3": [ $p_null, $p_bool, $p_int, $p_dec, $p_dbl, $p_str, $p_arr, $p_obj ]
+}
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries/parseonly/001/parseonly_01.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries/parseonly/001/parseonly_01.3.query.sqlpp
new file mode 100644
index 0000000..3730708
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries/parseonly/001/parseonly_01.3.query.sqlpp
@@ -0,0 +1,30 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+/*
+ * Description  : Test named statement parameters with json encoded request
+ * Expected Res : Success
+ * Date         : Jun 2018
+ */
+
+-- param parse-only:string=true
+
+
+select count(*) from ChirpUsers  where field1=$qname and field2=$val and field3=$1;
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries/parseonly/001/parseonly_01.4.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries/parseonly/001/parseonly_01.4.query.sqlpp
new file mode 100644
index 0000000..2a25662
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries/parseonly/001/parseonly_01.4.query.sqlpp
@@ -0,0 +1,29 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 at
+ *
+ *   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.
+ */
+
+/*
+ * Description  : Test named statement parameters with json encoded request
+ * Expected Res : Success
+ * Date         : Jun 2018
+ */
+
+-- param parse-only:string=true
+
+
+select $p_int, $p_str
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries/parseonly/001/parseonly_01.5.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries/parseonly/001/parseonly_01.5.query.sqlpp
new file mode 100644
index 0000000..9975f8b
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries/parseonly/001/parseonly_01.5.query.sqlpp
@@ -0,0 +1,34 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 at
+ *
+ *   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.
+ */
+
+/*
+ * Description  : Test named statement parameters with json encoded request
+ * Expected Res : Success
+ * Date         : Jun 2018
+ */
+
+-- param parse-only:string=true
+
+// requesttype=application/json
+
+
+{
+  "t1": $p_int + ? + $1,
+  "t2": $p_str || ? || $2
+}
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries/parseonly/002/parseonly_02.1.parse.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries/parseonly/002/parseonly_02.1.parse.sqlpp
new file mode 100644
index 0000000..13b9de5
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries/parseonly/002/parseonly_02.1.parse.sqlpp
@@ -0,0 +1,28 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+/*
+ * Description  : Test named statement parameters with json encoded request
+ * Expected Res : Failure
+ * Date         : Jun 2018
+ */
+
+-- param parse-only:string=true
+
+select count(*) from ChirpUsers name=$qname"
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/parseonly/001/parseonly_01.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/parseonly/001/parseonly_01.1.adm
new file mode 100644
index 0000000..70522ea
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/parseonly/001/parseonly_01.1.adm
@@ -0,0 +1 @@
+{"statement-parameters":["qname"]}
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/parseonly/001/parseonly_01.2.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/parseonly/001/parseonly_01.2.adm
new file mode 100644
index 0000000..3f0a194
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/parseonly/001/parseonly_01.2.adm
@@ -0,0 +1 @@
+{"statement-parameters":["p_arr","p_bool","p_dbl","p_dec","p_int","p_null","p_obj","p_str"]}
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/parseonly/001/parseonly_01.3.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/parseonly/001/parseonly_01.3.adm
new file mode 100644
index 0000000..d2b0d34
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/parseonly/001/parseonly_01.3.adm
@@ -0,0 +1 @@
+{"statement-parameters":[1,"qname","val"]}
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/parseonly/001/parseonly_01.4.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/parseonly/001/parseonly_01.4.adm
new file mode 100644
index 0000000..782b0af
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/parseonly/001/parseonly_01.4.adm
@@ -0,0 +1 @@
+{"statement-parameters":["p_int","p_str"]}
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/parseonly/001/parseonly_01.5.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/parseonly/001/parseonly_01.5.adm
new file mode 100644
index 0000000..c7715a1
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/parseonly/001/parseonly_01.5.adm
@@ -0,0 +1 @@
+{"statement-parameters":[1,2,"p_int","p_str"]}
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_parseonly.xml b/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_parseonly.xml
new file mode 100644
index 0000000..f7cea01
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_parseonly.xml
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ ! Licensed to the Apache Software Foundation (ASF) under one
+ ! or more contributor license agreements.  See the NOTICE file
+ ! distributed with this work for additional information
+ ! regarding copyright ownership.  The ASF licenses this file
+ ! to you 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 at
+ !
+ !   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.
+ !-->
+<test-suite xmlns="urn:xml.testframework.asterix.apache.org" ResultOffsetPath="results" QueryOffsetPath="queries"
+            QueryFileExtension=".sqlpp">
+    <test-group name="parseonly">
+        <test-case FilePath="parseonly">
+            <compilation-unit name="001">
+                <output-dir compare="Text">001</output-dir>
+            </compilation-unit>
+        </test-case>
+        <test-case FilePath="parseonly">
+            <compilation-unit name="002">
+                <output-dir compare="Text">named_02</output-dir>
+                <expected-error>ASX1001</expected-error>
+            </compilation-unit>
+        </test-case>
+    </test-group>
+</test-suite>
diff --git a/asterixdb/asterix-lang-aql/src/main/java/org/apache/asterix/lang/aql/rewrites/AqlQueryRewriter.java b/asterixdb/asterix-lang-aql/src/main/java/org/apache/asterix/lang/aql/rewrites/AqlQueryRewriter.java
index 61cecfb..9aaf5b7 100644
--- a/asterixdb/asterix-lang-aql/src/main/java/org/apache/asterix/lang/aql/rewrites/AqlQueryRewriter.java
+++ b/asterixdb/asterix-lang-aql/src/main/java/org/apache/asterix/lang/aql/rewrites/AqlQueryRewriter.java
@@ -143,6 +143,11 @@
         return gfc.getCalls();
     }
 
+    @Override
+    public Set<VariableExpr> getExternalVariables(Expression expr) {
+        throw new UnsupportedOperationException("getExternalVariables not implemented for AQL");
+    }
+
     private static class GatherFunctionCalls extends GatherFunctionCallsVisitor implements IAQLVisitor<Void, Void> {
 
         public GatherFunctionCalls() {
diff --git a/asterixdb/asterix-lang-common/src/main/java/org/apache/asterix/lang/common/base/IQueryRewriter.java b/asterixdb/asterix-lang-common/src/main/java/org/apache/asterix/lang/common/base/IQueryRewriter.java
index 8f3b8a9..7500ab9 100644
--- a/asterixdb/asterix-lang-common/src/main/java/org/apache/asterix/lang/common/base/IQueryRewriter.java
+++ b/asterixdb/asterix-lang-common/src/main/java/org/apache/asterix/lang/common/base/IQueryRewriter.java
@@ -24,6 +24,7 @@
 
 import org.apache.asterix.common.exceptions.CompilationException;
 import org.apache.asterix.lang.common.expression.CallExpr;
+import org.apache.asterix.lang.common.expression.VariableExpr;
 import org.apache.asterix.lang.common.rewrites.LangRewritingContext;
 import org.apache.asterix.lang.common.statement.FunctionDecl;
 import org.apache.asterix.lang.common.struct.VarIdentifier;
@@ -53,4 +54,9 @@
      */
     Set<CallExpr> getFunctionCalls(Expression expression) throws CompilationException;
 
+    /**
+     * Find all external variables (positional and named variables) in given expression
+     */
+    Set<VariableExpr> getExternalVariables(Expression expr) throws CompilationException;
+
 }
diff --git a/asterixdb/asterix-lang-sqlpp/src/main/java/org/apache/asterix/lang/sqlpp/rewrites/SqlppQueryRewriter.java b/asterixdb/asterix-lang-sqlpp/src/main/java/org/apache/asterix/lang/sqlpp/rewrites/SqlppQueryRewriter.java
index 69a3e5e..942fc88 100644
--- a/asterixdb/asterix-lang-sqlpp/src/main/java/org/apache/asterix/lang/sqlpp/rewrites/SqlppQueryRewriter.java
+++ b/asterixdb/asterix-lang-sqlpp/src/main/java/org/apache/asterix/lang/sqlpp/rewrites/SqlppQueryRewriter.java
@@ -22,6 +22,7 @@
 import java.util.Collection;
 import java.util.List;
 import java.util.Set;
+import java.util.HashSet;
 
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
@@ -33,6 +34,7 @@
 import org.apache.asterix.lang.common.base.IReturningStatement;
 import org.apache.asterix.lang.common.clause.LetClause;
 import org.apache.asterix.lang.common.expression.CallExpr;
+import org.apache.asterix.lang.common.expression.VariableExpr;
 import org.apache.asterix.lang.common.rewrites.LangRewritingContext;
 import org.apache.asterix.lang.common.statement.FunctionDecl;
 import org.apache.asterix.lang.common.struct.Identifier;
@@ -77,6 +79,9 @@
 import org.apache.asterix.lang.sqlpp.struct.SetOperationRight;
 import org.apache.asterix.lang.sqlpp.util.FunctionMapUtil;
 import org.apache.asterix.lang.sqlpp.util.SqlppAstPrintUtil;
+import org.apache.asterix.lang.sqlpp.util.SqlppVariableUtil;
+import org.apache.asterix.lang.sqlpp.visitor.FreeVariableVisitor;
+import org.apache.asterix.lang.sqlpp.visitor.base.AbstractSqlppQueryExpressionVisitor;
 import org.apache.asterix.lang.sqlpp.visitor.base.ISqlppVisitor;
 import org.apache.asterix.metadata.declared.MetadataProvider;
 import org.apache.hyracks.algebricks.common.utils.Pair;
@@ -297,6 +302,19 @@
         return gfc.getCalls();
     }
 
+    @Override
+    public Set<VariableExpr> getExternalVariables(Expression expr) throws CompilationException {
+        Set<VariableExpr> freeVars = SqlppVariableUtil.getFreeVariables(expr);
+
+        Set<VariableExpr> extVars = new HashSet<>();
+        for (VariableExpr ve : freeVars) {
+            if (SqlppVariableUtil.isExternalVariableReference(ve)) {
+                extVars.add(ve);
+            }
+        }
+        return extVars;
+    }
+
     private static class GatherFunctionCalls extends GatherFunctionCallsVisitor implements ISqlppVisitor<Void, Void> {
 
         public GatherFunctionCalls() {
diff --git a/asterixdb/asterix-lang-sqlpp/src/main/java/org/apache/asterix/lang/sqlpp/util/SqlppVariableUtil.java b/asterixdb/asterix-lang-sqlpp/src/main/java/org/apache/asterix/lang/sqlpp/util/SqlppVariableUtil.java
index 8fabf13..f71ae5b 100644
--- a/asterixdb/asterix-lang-sqlpp/src/main/java/org/apache/asterix/lang/sqlpp/util/SqlppVariableUtil.java
+++ b/asterixdb/asterix-lang-sqlpp/src/main/java/org/apache/asterix/lang/sqlpp/util/SqlppVariableUtil.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.lang.sqlpp.util;
 
 import java.util.ArrayList;
-import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -39,7 +38,6 @@
 import org.apache.asterix.lang.sqlpp.clause.AbstractBinaryCorrelateClause;
 import org.apache.asterix.lang.sqlpp.clause.FromClause;
 import org.apache.asterix.lang.sqlpp.clause.FromTerm;
-import org.apache.asterix.lang.sqlpp.clause.SelectBlock;
 import org.apache.asterix.lang.sqlpp.visitor.FreeVariableVisitor;
 import org.apache.hyracks.algebricks.common.utils.Pair;
 
@@ -80,6 +78,10 @@
         if (varName.startsWith(USER_VAR_PREFIX)) {
             return varName.substring(1);
         }
+        if (varName.startsWith(EXTERNAL_VAR_PREFIX)) {
+            return varName.substring(1);
+        }
+
         return varName;
     }
 
@@ -95,6 +97,15 @@
         return EXTERNAL_VAR_PREFIX + varName;
     }
 
+    public static boolean isPositionalVariableIdentifier(VarIdentifier varId) {
+        try {
+            Integer.parseInt(toUserDefinedName(varId.getValue()));
+            return true;
+        } catch (NumberFormatException ignored) {
+            return false;
+        }
+    }
+
     public static boolean isExternalVariableIdentifier(VarIdentifier varId) {
         return varId.getValue().startsWith(EXTERNAL_VAR_PREFIX);
     }