diff --git a/asterix-lang-sqlpp/src/main/javacc/SQLPP.html b/asterix-lang-sqlpp/src/main/javacc/SQLPP.html
index 42aaa06..ebe7926 100644
--- a/asterix-lang-sqlpp/src/main/javacc/SQLPP.html
+++ b/asterix-lang-sqlpp/src/main/javacc/SQLPP.html
@@ -403,7 +403,7 @@
 <TR>
 <TD ALIGN=RIGHT VALIGN=BASELINE><A NAME="prod21">DatasetSpecification</A></TD>
 <TD ALIGN=CENTER VALIGN=BASELINE>::=</TD>
-<TD ALIGN=LEFT VALIGN=BASELINE>( &lt;EXTERNAL&gt; &lt;DATASET&gt; <A HREF="#prod30">QualifiedName</A> &lt;LEFTPAREN&gt; <A HREF="#prod27">TypeName</A> &lt;RIGHTPAREN&gt; <A HREF="#prod28">IfNotExists</A> &lt;USING&gt; <A HREF="#prod31">AdapterName</A> <A HREF="#prod32">Configuration</A> ( &lt;ON&gt; <A HREF="#prod18">Identifier</A> )? ( &lt;HINTS&gt; <A HREF="#prod33">Properties</A> )? ( &lt;USING&gt; &lt;COMPACTION&gt; &lt;POLICY&gt; <A HREF="#prod34">CompactionPolicy</A> ( <A HREF="#prod32">Configuration</A> )? )? | ( &lt;INTERNAL&gt; | &lt;TEMPORARY&gt; )? &lt;DATASET&gt; <A HREF="#prod30">QualifiedName</A> &lt;LEFTPAREN&gt; <A HREF="#prod27">TypeName</A> ( &lt;COMMA&gt; <A HREF="#prod27">TypeName</A> )? &lt;RIGHTPAREN&gt; <A HREF="#prod28">IfNotExists</A> <A HREF="#prod35">PrimaryKey</A> ( &lt;AUTOGENERATED&gt; )? ( &lt;ON&gt; <A HREF="#prod18">Identifier</A> )? ( &lt;HINTS&gt; <A HREF="#prod33">Properties</A> )? ( &lt;USING&gt; &lt;COMPACTION&gt; &lt;POLICY&gt; <A HREF="#prod34">CompactionPolicy</A> ( <A HREF="#prod32">Configuration</A> )? )? ( &lt;WITH&gt; &lt;FILTER&gt; &lt;ON&gt; <A HREF="#prod36">NestedField</A> )? )</TD>
+<TD ALIGN=LEFT VALIGN=BASELINE>( &lt;EXTERNAL&gt; &lt;DATASET&gt; <A HREF="#prod30">QualifiedName</A> &lt;LEFTPAREN&gt; <A HREF="#prod27">TypeName</A> &lt;RIGHTPAREN&gt; <A HREF="#prod28">IfNotExists</A> &lt;USING&gt; <A HREF="#prod31">AdapterName</A> <A HREF="#prod32">Configuration</A> ( &lt;ON&gt; <A HREF="#prod18">Identifier</A> )? ( &lt;HINTS&gt; <A HREF="#prod33">Properties</A> )? ( &lt;USING&gt; &lt;COMPACTION&gt; &lt;POLICY&gt; <A HREF="#prod34">CompactionPolicy</A> ( <A HREF="#prod32">Configuration</A> )? )? | ( &lt;INTERNAL&gt; | &lt;TEMPORARY&gt; )? &lt;DATASET&gt; <A HREF="#prod30">QualifiedName</A> &lt;LEFTPAREN&gt; <A HREF="#prod27">TypeName</A> &lt;RIGHTPAREN&gt; ( &lt;WITH&gt; <A HREF="#prod18">Identifier</A> &lt;LEFTPAREN&gt; <A HREF="#prod27">TypeName</A> &lt;RIGHTPAREN&gt; )? <A HREF="#prod28">IfNotExists</A> <A HREF="#prod35">PrimaryKey</A> ( &lt;AUTOGENERATED&gt; )? ( &lt;ON&gt; <A HREF="#prod18">Identifier</A> )? ( &lt;HINTS&gt; <A HREF="#prod33">Properties</A> )? ( &lt;USING&gt; &lt;COMPACTION&gt; &lt;POLICY&gt; <A HREF="#prod34">CompactionPolicy</A> ( <A HREF="#prod32">Configuration</A> )? )? ( &lt;WITH&gt; &lt;FILTER&gt; &lt;ON&gt; <A HREF="#prod36">NestedField</A> )? )</TD>
 </TR>
 <TR>
 <TD ALIGN=RIGHT VALIGN=BASELINE><A NAME="prod16">RefreshExternalDatasetStatement</A></TD>
@@ -623,7 +623,7 @@
 <TR>
 <TD ALIGN=RIGHT VALIGN=BASELINE><A NAME="prod36">NestedField</A></TD>
 <TD ALIGN=CENTER VALIGN=BASELINE>::=</TD>
-<TD ALIGN=LEFT VALIGN=BASELINE>( &lt;ATT&gt; )? <A HREF="#prod18">Identifier</A> ( &lt;DOT&gt; <A HREF="#prod18">Identifier</A> )*</TD>
+<TD ALIGN=LEFT VALIGN=BASELINE><A HREF="#prod18">Identifier</A> ( &lt;LEFTPAREN&gt; &lt;RIGHTPAREN&gt; )? ( &lt;DOT&gt; <A HREF="#prod18">Identifier</A> )*</TD>
 </TR>
 <TR>
 <TD ALIGN=RIGHT VALIGN=BASELINE><A NAME="prod40">QuotedString</A></TD>
diff --git a/asterix-lang-sqlpp/src/main/javacc/SQLPP.jj b/asterix-lang-sqlpp/src/main/javacc/SQLPP.jj
index 6259faa..ec915e9 100644
--- a/asterix-lang-sqlpp/src/main/javacc/SQLPP.jj
+++ b/asterix-lang-sqlpp/src/main/javacc/SQLPP.jj
@@ -421,14 +421,14 @@
   Map<String,String> properties = null;
   Map<String,String> compactionPolicyProperties = null;
   FunctionSignature appliedFunction = null;
-  List<List<String>> primaryKeyFields = null;
+  Pair<List<Integer>, List<List<String>>> primaryKeyFields = null;
   String nodeGroupName = null;
   Map<String,String> hints = new HashMap<String,String>();
   DatasetDecl dsetDecl = null;
   boolean autogenerated = false;
   String compactionPolicy = null;
   boolean temp = false;
-  List<String> filterField = null;
+  Pair<Integer, List<String>> filterField = null;
   Pair<Identifier,Identifier> metaTypeComponents = new Pair<Identifier, Identifier>(null, null);
 }
 {
@@ -481,9 +481,13 @@
     ( <USING> <COMPACTION> <POLICY> compactionPolicy = CompactionPolicy() (LOOKAHEAD(1) compactionPolicyProperties = Configuration())? )?
     ( LOOKAHEAD(2) <WITH> <FILTER> <ON>  filterField = NestedField() )?
       {
-        InternalDetailsDecl idd = new InternalDetailsDecl(primaryKeyFields,
+        if(filterField!=null && filterField.first!=0){
+          throw new ParseException("A filter field can only be a field in the main record of the dataset.");
+        }
+        InternalDetailsDecl idd = new InternalDetailsDecl(primaryKeyFields.second,
+                                                          primaryKeyFields.first,
                                                           autogenerated,
-                                                          filterField,
+                                                          filterField == null? null : filterField.second,
                                                           temp);
         dsetDecl = new DatasetDecl(nameComponents.first,
                                    nameComponents.second,
@@ -547,7 +551,7 @@
   String indexName = null;
   boolean ifNotExists = false;
   Pair<Identifier,Identifier> nameComponents = null;
-  Pair<List<String>, TypeExpression> fieldPair = null;
+  Pair<Integer, Pair<List<String>, TypeExpression>> fieldPair = null;
   IndexParams indexType = null;
   boolean enforced = false;
 }
@@ -557,11 +561,13 @@
   <ON> nameComponents = QualifiedName()
   <LEFTPAREN> ( fieldPair = OpenField()
     {
-      cis.addFieldExprPair(fieldPair);
+      cis.addFieldExprPair(fieldPair.second);
+      cis.addFieldIndexIndicator(fieldPair.first);
     }
   ) (<COMMA> fieldPair = OpenField()
     {
-      cis.addFieldExprPair(fieldPair);
+      cis.addFieldExprPair(fieldPair.second);
+      cis.addFieldIndexIndicator(fieldPair.first);
     }
   )* <RIGHTPAREN> ( <TYPE> indexType = IndexType() )? ( <ENFORCED> { enforced = true; } )?
     {
@@ -825,23 +831,26 @@
     }
 }
 
-List<List<String>> PrimaryKey() throws ParseException:
+Pair<List<Integer>, List<List<String>>> PrimaryKey() throws ParseException:
 {
-  List<String> tmp = null;
+  Pair<Integer, List<String>> tmp = null;
+  List<Integer> keyFieldSourceIndicators = new ArrayList<Integer>();
   List<List<String>> primaryKeyFields = new ArrayList<List<String>>();
 }
 {
   <PRIMARY> <KEY> tmp = NestedField()
     {
-      primaryKeyFields.add(tmp);
+      keyFieldSourceIndicators.add(tmp.first);
+      primaryKeyFields.add(tmp.second);
     }
   ( <COMMA> tmp = NestedField()
     {
-      primaryKeyFields.add(tmp);
+      keyFieldSourceIndicators.add(tmp.first);
+      primaryKeyFields.add(tmp.second);
     }
   )*
     {
-      return primaryKeyFields;
+      return new Pair<List<Integer>, List<List<String>>> (keyFieldSourceIndicators, primaryKeyFields);
     }
 }
 
@@ -1380,23 +1389,25 @@
   )
 }
 
-Pair<List<String>, TypeExpression> OpenField() throws ParseException:
+Pair<Integer, Pair<List<String>, TypeExpression>> OpenField() throws ParseException:
 {
   TypeExpression fieldType = null;
-  List<String> fieldList = null;
+  Pair<Integer, List<String>> fieldList = null;
 }
 {
   fieldList = NestedField()
   ( <COLON> fieldType =  IndexedTypeExpr() )?
   {
-    return new Pair<List<String>, TypeExpression>(fieldList, fieldType);
+    return new Pair<Integer, Pair<List<String>, TypeExpression>>
+          (fieldList.first, new Pair<List<String>, TypeExpression>(fieldList.second, fieldType));
   }
 }
 
-List<String> NestedField() throws ParseException:
+Pair<Integer, List<String>> NestedField() throws ParseException:
 {
   List<String> exprList = new ArrayList<String>();
   String lit = null;
+  int source = 0;
 }
 {
   lit = Identifier()
@@ -1404,14 +1415,14 @@
     boolean meetParens = false;
   }
   (
+    LOOKAHEAD(1)
     <LEFTPAREN><RIGHTPAREN>
     {
-        if(lit.toLowerCase().equals("meta")){
-            exprList.add(lit.toLowerCase() + "()");
-        }else{
+        if(!lit.toLowerCase().equals("meta")){
             throw new ParseException("The string before () has to be \"meta\".");
         }
         meetParens = true;
+        source = 1;
     }
   )?
   {
@@ -1426,7 +1437,7 @@
     }
   )*
   {
-    return exprList;
+    return new Pair<Integer, List<String>>(source, exprList);
   }
 }