diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/api/common/APIFramework.java b/asterix-app/src/main/java/edu/uci/ics/asterix/api/common/APIFramework.java
index 862c701..8d65323 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/api/common/APIFramework.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/api/common/APIFramework.java
@@ -181,7 +181,7 @@
                 }
             }
         }
-        AqlRewriter rw = new AqlRewriter(declaredFunctions, q, metadataProvider.getMetadataTxnContext());
+        AqlRewriter rw = new AqlRewriter(declaredFunctions, q, metadataProvider);
         rw.rewrite();
         Query rwQ = rw.getExpr();
         return new Pair(rwQ, rw.getVarCounter());
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-1_1/dblp-1_1.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-1_1/dblp-1_1.3.query.aql
index bc6490d..c3b22f0 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-1_1/dblp-1_1.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-1_1/dblp-1_1.3.query.aql
@@ -1,5 +1,6 @@
 use dataverse fuzzyjoin;
 
+set import-private-functions 'true';
             //
             // -- - Stage 1 - --
             //
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-1_2.1.1/dblp-1_2.1.1.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-1_2.1.1/dblp-1_2.1.1.3.query.aql
index e6a2e36..5f0ede9 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-1_2.1.1/dblp-1_2.1.1.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-1_2.1.1/dblp-1_2.1.1.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
             //
             // -- - Stage 1 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-1_2.1/dblp-1_2.1.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-1_2.1/dblp-1_2.1.3.query.aql
index e6a2e36..dd0f1ba 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-1_2.1/dblp-1_2.1.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-1_2.1/dblp-1_2.1.3.query.aql
@@ -1,5 +1,5 @@
 use dataverse fuzzyjoin;
-
+set import-private-functions 'true';
             //
             // -- - Stage 1 - --
             //
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-1_2/dblp-1_2.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-1_2/dblp-1_2.3.query.aql
index aa6a746..6d3d69b 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-1_2/dblp-1_2.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-1_2/dblp-1_2.3.query.aql
@@ -1,5 +1,5 @@
 use dataverse fuzzyjoin;
-
+set import-private-functions 'true';
             //
             // -- - Stage 1 - --
             //
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2.1_5.3.1/dblp-2.1_5.3.1.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2.1_5.3.1/dblp-2.1_5.3.1.3.query.aql
index 70de806..adcb9c7 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2.1_5.3.1/dblp-2.1_5.3.1.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2.1_5.3.1/dblp-2.1_5.3.1.3.query.aql
@@ -1,5 +1,5 @@
 use dataverse fuzzyjoin;
-
+set import-private-functions 'true';
     //
     // -- - Stage 2 - --
     //
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2.2/dblp-2.2.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2.2/dblp-2.2.3.query.aql
index 03add70..b7a71e9 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2.2/dblp-2.2.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2.2/dblp-2.2.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
     //
     // -- - Stage 2 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_1/dblp-2_1.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_1/dblp-2_1.3.query.aql
index 977a2a9..621f40e 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_1/dblp-2_1.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_1/dblp-2_1.3.query.aql
@@ -1,5 +1,5 @@
 use dataverse fuzzyjoin;
-
+set import-private-functions 'true';
     //
     // -- - Stage 2 - --
     //
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_2/dblp-2_2.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_2/dblp-2_2.3.query.aql
index 275a4cf..ddcded7 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_2/dblp-2_2.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_2/dblp-2_2.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
     //
     // -- - Stage 2 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_3/dblp-2_3.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_3/dblp-2_3.3.query.aql
index 8f75103..cfa6079 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_3/dblp-2_3.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_3/dblp-2_3.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
     //
     // -- - Stage 2 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_4/dblp-2_4.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_4/dblp-2_4.3.query.aql
index abb7736..a1eca39 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_4/dblp-2_4.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_4/dblp-2_4.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
     //
     // -- - Stage 2 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_5.1/dblp-2_5.1.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_5.1/dblp-2_5.1.3.query.aql
index 1950989..1bf3ea3 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_5.1/dblp-2_5.1.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_5.1/dblp-2_5.1.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
     //
     // -- - Stage 2 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_5.2/dblp-2_5.2.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_5.2/dblp-2_5.2.3.query.aql
index f6b4832..ad5fbad 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_5.2/dblp-2_5.2.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_5.2/dblp-2_5.2.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
     //
     // -- - Stage 2 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_5.3.1/dblp-2_5.3.1.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_5.3.1/dblp-2_5.3.1.3.query.aql
index 6ea3207..666e91b 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_5.3.1/dblp-2_5.3.1.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_5.3.1/dblp-2_5.3.1.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
     //
     // -- - Stage 2 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_5.3/dblp-2_5.3.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_5.3/dblp-2_5.3.3.query.aql
index 6ea3207..666e91b 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_5.3/dblp-2_5.3.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_5.3/dblp-2_5.3.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
     //
     // -- - Stage 2 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_5/dblp-2_5.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_5/dblp-2_5.3.query.aql
index 81013bb..b14940f 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_5/dblp-2_5.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-2_5/dblp-2_5.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
     //
     // -- - Stage 2 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-3_1.1/dblp-3_1.1.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-3_1.1/dblp-3_1.1.3.query.aql
index 039ed1b..c6260c2 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-3_1.1/dblp-3_1.1.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-3_1.1/dblp-3_1.1.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
 //
 // -- - Stage 3 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-3_1.2/dblp-3_1.2.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-3_1.2/dblp-3_1.2.3.query.aql
index 2c2d349..cac9513 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-3_1.2/dblp-3_1.2.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-3_1.2/dblp-3_1.2.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
 //
 // -- - Stage 3 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-3_1/dblp-3_1.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-3_1/dblp-3_1.3.query.aql
index 0d1976b..9763760 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-3_1/dblp-3_1.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-3_1/dblp-3_1.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
 //
 // -- - Stage 3 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_1/dblp-csx-2_1.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_1/dblp-csx-2_1.3.query.aql
index 2d3a1f2..51266cd 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_1/dblp-csx-2_1.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_1/dblp-csx-2_1.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
     //
     // -- - Stage 2 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_2/dblp-csx-2_2.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_2/dblp-csx-2_2.3.query.aql
index 8847306..1482237 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_2/dblp-csx-2_2.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_2/dblp-csx-2_2.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
     //
     // -- - Stage 2 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_3/dblp-csx-2_3.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_3/dblp-csx-2_3.3.query.aql
index 4438e50..07846e7 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_3/dblp-csx-2_3.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_3/dblp-csx-2_3.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
     //
     // -- - Stage 2 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_4/dblp-csx-2_4.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_4/dblp-csx-2_4.3.query.aql
index e2fc8d1..6a6826a 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_4/dblp-csx-2_4.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_4/dblp-csx-2_4.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
     //
     // -- - Stage 2 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_5.1/dblp-csx-2_5.1.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_5.1/dblp-csx-2_5.1.3.query.aql
index d6e7183..b92449f 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_5.1/dblp-csx-2_5.1.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_5.1/dblp-csx-2_5.1.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
     //
     // -- - Stage 2 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_5.2/dblp-csx-2_5.2.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_5.2/dblp-csx-2_5.2.3.query.aql
index f379cf4..cab57b4 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_5.2/dblp-csx-2_5.2.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_5.2/dblp-csx-2_5.2.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
     //
     // -- - Stage 2 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_5.3.1/dblp-csx-2_5.3.1.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_5.3.1/dblp-csx-2_5.3.1.3.query.aql
index de3c8e8..5ef887e 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_5.3.1/dblp-csx-2_5.3.1.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_5.3.1/dblp-csx-2_5.3.1.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
     //
     // -- - Stage 2 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_5.3/dblp-csx-2_5.3.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_5.3/dblp-csx-2_5.3.3.query.aql
index 803db8f..65b86d6 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_5.3/dblp-csx-2_5.3.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_5.3/dblp-csx-2_5.3.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
     //
     // -- - Stage 2 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_5/dblp-csx-2_5.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_5/dblp-csx-2_5.3.query.aql
index 60ea2ee..c562ba9 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_5/dblp-csx-2_5.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-2_5/dblp-csx-2_5.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
     //
     // -- - Stage 2 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_1/dblp-csx-3_1.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_1/dblp-csx-3_1.3.query.aql
index 8757f02..a8e5821 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_1/dblp-csx-3_1.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_1/dblp-csx-3_1.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
 //
 // -- - Stage 3 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_2/dblp-csx-3_2.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_2/dblp-csx-3_2.3.query.aql
index 7d40888..e643523 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_2/dblp-csx-3_2.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_2/dblp-csx-3_2.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
 //
 // -- - Stage 3 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_3/dblp-csx-3_3.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_3/dblp-csx-3_3.3.query.aql
index 85ace1c..2dae3af 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_3/dblp-csx-3_3.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_3/dblp-csx-3_3.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
 //
 // -- - Stage 3 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_4/dblp-csx-3_4.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_4/dblp-csx-3_4.3.query.aql
index 3574534..3f5a623 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_4/dblp-csx-3_4.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_4/dblp-csx-3_4.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
 //
 // -- - Stage 3 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.1/dblp-csx-3_5.1.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.1/dblp-csx-3_5.1.3.query.aql
index 6a6dc0c..832ec5c 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.1/dblp-csx-3_5.1.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.1/dblp-csx-3_5.1.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
 //
 // -- - Stage 3 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.2/dblp-csx-3_5.2.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.2/dblp-csx-3_5.2.3.query.aql
index 5359b9f..e17ad08 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.2/dblp-csx-3_5.2.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.2/dblp-csx-3_5.2.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
 //
 // -- - Stage 3 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.3.1/dblp-csx-3_5.3.1.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.3.1/dblp-csx-3_5.3.1.3.query.aql
index f0dbf23..52456d7 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.3.1/dblp-csx-3_5.3.1.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.3.1/dblp-csx-3_5.3.1.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
 //
 // -- - Stage 3 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.3/dblp-csx-3_5.3.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.3/dblp-csx-3_5.3.3.query.aql
index 40aba87..ba532b9 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.3/dblp-csx-3_5.3.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.3/dblp-csx-3_5.3.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
 //
 // -- - Stage 3 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.4.1/dblp-csx-3_5.4.1.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.4.1/dblp-csx-3_5.4.1.3.query.aql
index 103af68..f68ef0e 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.4.1/dblp-csx-3_5.4.1.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.4.1/dblp-csx-3_5.4.1.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
 //
 // -- - Stage 3 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.4/dblp-csx-3_5.4.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.4/dblp-csx-3_5.4.3.query.aql
index 2199203..ecc30bc 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.4/dblp-csx-3_5.4.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5.4/dblp-csx-3_5.4.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
 //
 // -- - Stage 3 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5/dblp-csx-3_5.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5/dblp-csx-3_5.3.query.aql
index 44807b2..9b80d4d 100644
--- a/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5/dblp-csx-3_5.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/fuzzyjoin/dblp-csx-3_5/dblp-csx-3_5.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse fuzzyjoin;
+set import-private-functions 'true';
 
 //
 // -- - Stage 3 - --
diff --git a/asterix-app/src/test/resources/runtimets/queries/index-selection/fuzzy-inverted-index-ngram-jaccard/fuzzy-inverted-index-ngram-jaccard.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/index-selection/fuzzy-inverted-index-ngram-jaccard/fuzzy-inverted-index-ngram-jaccard.3.query.aql
index 79b65bb..dc18182 100644
--- a/asterix-app/src/test/resources/runtimets/queries/index-selection/fuzzy-inverted-index-ngram-jaccard/fuzzy-inverted-index-ngram-jaccard.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/index-selection/fuzzy-inverted-index-ngram-jaccard/fuzzy-inverted-index-ngram-jaccard.3.query.aql
@@ -1,6 +1,7 @@
 use dataverse test;
+set import-private-functions 'true';
 
 for $o in dataset('DBLP')
 let $jacc := similarity-jaccard-check(gram-tokens($o.title, 3, false), gram-tokens("Transactions for Cooperative Environments", 3, false), 0.5f)
 where $jacc[0]
-return $o
\ No newline at end of file
+return $o
diff --git a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/ngram-jaccard-inline/ngram-jaccard-inline.4.query.aql b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/ngram-jaccard-inline/ngram-jaccard-inline.4.query.aql
index dcd5245..1851f7c 100644
--- a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/ngram-jaccard-inline/ngram-jaccard-inline.4.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/ngram-jaccard-inline/ngram-jaccard-inline.4.query.aql
@@ -7,6 +7,7 @@
  */
 
 use dataverse test;
+set import-private-functions 'true';
 
 for $a in dataset('DBLP')
 for $b in dataset('CSX')
diff --git a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/ngram-jaccard/ngram-jaccard.4.query.aql b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/ngram-jaccard/ngram-jaccard.4.query.aql
index 4364545..8bd1d9c 100644
--- a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/ngram-jaccard/ngram-jaccard.4.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/ngram-jaccard/ngram-jaccard.4.query.aql
@@ -6,6 +6,7 @@
  */
 
 use dataverse test;
+set import-private-functions 'true';
 
 for $a in dataset('DBLP')
 for $b in dataset('CSX')
diff --git a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/olist-edit-distance-inline/olist-edit-distance-inline.4.query.aql b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/olist-edit-distance-inline/olist-edit-distance-inline.4.query.aql
index d904c09..1a4be9b 100644
--- a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/olist-edit-distance-inline/olist-edit-distance-inline.4.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/olist-edit-distance-inline/olist-edit-distance-inline.4.query.aql
@@ -7,6 +7,7 @@
  */
 
 use dataverse test;
+set import-private-functions 'true';
 
 for $a in dataset('Customers')
 for $b in dataset('Customers2')
diff --git a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/olist-edit-distance/olist-edit-distance.4.query.aql b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/olist-edit-distance/olist-edit-distance.4.query.aql
index b9221da..545db4a 100644
--- a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/olist-edit-distance/olist-edit-distance.4.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/olist-edit-distance/olist-edit-distance.4.query.aql
@@ -6,6 +6,7 @@
  */
 
 use dataverse test;
+set import-private-functions 'true';
 
 for $a in dataset('Customers')
 for $b in dataset('Customers2')
diff --git a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/olist-jaccard-inline/olist-jaccard-inline.4.query.aql b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/olist-jaccard-inline/olist-jaccard-inline.4.query.aql
index 8dda04e..159b30e 100644
--- a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/olist-jaccard-inline/olist-jaccard-inline.4.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/olist-jaccard-inline/olist-jaccard-inline.4.query.aql
@@ -7,6 +7,7 @@
  */
 
 use dataverse test;
+set import-private-functions 'true';
 
 for $a in dataset('Customers')
 for $b in dataset('Customers2')
diff --git a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/olist-jaccard/olist-jaccard.4.query.aql b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/olist-jaccard/olist-jaccard.4.query.aql
index 0af3efe..dd4f610 100644
--- a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/olist-jaccard/olist-jaccard.4.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/olist-jaccard/olist-jaccard.4.query.aql
@@ -6,6 +6,7 @@
  */
 
 use dataverse test;
+set import-private-functions 'true';
 
 for $a in dataset('Customers')
 for $b in dataset('Customers2')
diff --git a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/ulist-jaccard-inline/ulist-jaccard-inline.4.query.aql b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/ulist-jaccard-inline/ulist-jaccard-inline.4.query.aql
index b7b056e..260a871 100644
--- a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/ulist-jaccard-inline/ulist-jaccard-inline.4.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/ulist-jaccard-inline/ulist-jaccard-inline.4.query.aql
@@ -7,6 +7,7 @@
  */
 
 use dataverse test;
+set import-private-functions 'true';
 
 for $a in dataset('Customers')
 for $b in dataset('Customers2')
diff --git a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/ulist-jaccard/ulist-jaccard.4.query.aql b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/ulist-jaccard/ulist-jaccard.4.query.aql
index 57fd37c..2fe6e28 100644
--- a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/ulist-jaccard/ulist-jaccard.4.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/ulist-jaccard/ulist-jaccard.4.query.aql
@@ -6,6 +6,7 @@
  */
 
 use dataverse test;
+set import-private-functions 'true';
 
 for $a in dataset('Customers')
 for $b in dataset('Customers2')
diff --git a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/word-jaccard-inline/word-jaccard-inline.4.query.aql b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/word-jaccard-inline/word-jaccard-inline.4.query.aql
index 6faa6a7..8debbfd 100644
--- a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/word-jaccard-inline/word-jaccard-inline.4.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/word-jaccard-inline/word-jaccard-inline.4.query.aql
@@ -7,6 +7,7 @@
  */
 
 use dataverse test;
+set import-private-functions 'true';
 
 for $a in dataset('DBLP')
 for $b in dataset('CSX')
diff --git a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/word-jaccard/word-jaccard.4.query.aql b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/word-jaccard/word-jaccard.4.query.aql
index 3db8b5f..a8684e0 100644
--- a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/word-jaccard/word-jaccard.4.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join-noeqjoin/word-jaccard/word-jaccard.4.query.aql
@@ -6,6 +6,7 @@
  */
 
 use dataverse test;
+set import-private-functions 'true';
 
 for $a in dataset('DBLP')
 for $b in dataset('CSX')
diff --git a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join/ngram-jaccard-inline/ngram-jaccard-inline.4.query.aql b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join/ngram-jaccard-inline/ngram-jaccard-inline.4.query.aql
index e7fc13e..4068296 100644
--- a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join/ngram-jaccard-inline/ngram-jaccard-inline.4.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join/ngram-jaccard-inline/ngram-jaccard-inline.4.query.aql
@@ -6,6 +6,7 @@
  */
 
 use dataverse test;
+set import-private-functions 'true';
 
 for $a in dataset('DBLP')
 for $b in dataset('CSX')
diff --git a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join/ngram-jaccard/ngram-jaccard.4.query.aql b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join/ngram-jaccard/ngram-jaccard.4.query.aql
index b237130..b64e7e1 100644
--- a/asterix-app/src/test/resources/runtimets/queries/inverted-index-join/ngram-jaccard/ngram-jaccard.4.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/inverted-index-join/ngram-jaccard/ngram-jaccard.4.query.aql
@@ -5,6 +5,7 @@
  */
 
 use dataverse test;
+set import-private-functions 'true';
 
 for $a in dataset('DBLP')
 for $b in dataset('CSX')
diff --git a/asterix-app/src/test/resources/runtimets/queries/misc/range_01/range_01.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/misc/range_01/range_01.3.query.aql
index 439c244..a2bcb99 100644
--- a/asterix-app/src/test/resources/runtimets/queries/misc/range_01/range_01.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/misc/range_01/range_01.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 for $x in range(20,30)
 return $x
diff --git a/asterix-app/src/test/resources/runtimets/queries/records/closed-record-constructor_01/closed-record-constructor_01.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/records/closed-record-constructor_01/closed-record-constructor_01.3.query.aql
index 4ef8508..b4f18bf 100644
--- a/asterix-app/src/test/resources/runtimets/queries/records/closed-record-constructor_01/closed-record-constructor_01.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/records/closed-record-constructor_01/closed-record-constructor_01.3.query.aql
@@ -1,3 +1,4 @@
 use dataverse test;
+set import-private-functions 'true';
 
 closed-record-constructor("foo1", 10, "bar1", 20, "foo2", 30, "bar2", 40)
diff --git a/asterix-app/src/test/resources/runtimets/queries/records/closed-record-constructor_02/closed-record-constructor_02.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/records/closed-record-constructor_02/closed-record-constructor_02.3.query.aql
index c6e3756..040a7fb 100644
--- a/asterix-app/src/test/resources/runtimets/queries/records/closed-record-constructor_02/closed-record-constructor_02.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/records/closed-record-constructor_02/closed-record-constructor_02.3.query.aql
@@ -1,3 +1,4 @@
 use dataverse test;
+set import-private-functions 'true';
 
 closed-record-constructor("foo1", 10, "bar1", closed-record-constructor("bar1.1", 10, "bar1.2", 20, "bar1.3", 30, "bar1.4", closed-record-constructor("bar1.4.1", 10, "bar1.4.2", 20, "bar1.4.3", 30, "bar1.4.4", 40), "foo2", 30, "bar2", 40), "foo2", 30, "bar2", 40)
diff --git a/asterix-app/src/test/resources/runtimets/queries/records/closed-record-constructor_03/closed-record-constructor_03.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/records/closed-record-constructor_03/closed-record-constructor_03.3.query.aql
index 7285a75..416d22e 100644
--- a/asterix-app/src/test/resources/runtimets/queries/records/closed-record-constructor_03/closed-record-constructor_03.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/records/closed-record-constructor_03/closed-record-constructor_03.3.query.aql
@@ -1,3 +1,4 @@
 use dataverse test;
+set import-private-functions 'true';
 
 {"foo1": 10, "bar1": {"bar1.1": 10, "bar1.2": 20, "bar1.3": 30, "bar1.4": {"bar1.4.1": 10, "bar1.4.2": 20 } }, "foo2": 30, "bar2": 40}
diff --git a/asterix-app/src/test/resources/runtimets/queries/records/field-access-by-index_01/field-access-by-index_01.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/records/field-access-by-index_01/field-access-by-index_01.3.query.aql
index d25edc6..b5ff5ed 100644
--- a/asterix-app/src/test/resources/runtimets/queries/records/field-access-by-index_01/field-access-by-index_01.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/records/field-access-by-index_01/field-access-by-index_01.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $x := { "foo1": 10, "bar1": 20, "foo2": 30, "bar2": 40 }
 return field-access-by-index($x,2)
diff --git a/asterix-app/src/test/resources/runtimets/queries/records/open-record-constructor_01/open-record-constructor_01.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/records/open-record-constructor_01/open-record-constructor_01.3.query.aql
index d6c8701..43a8e19 100644
--- a/asterix-app/src/test/resources/runtimets/queries/records/open-record-constructor_01/open-record-constructor_01.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/records/open-record-constructor_01/open-record-constructor_01.3.query.aql
@@ -1,3 +1,4 @@
 use dataverse test;
+set import-private-functions 'true';
 
 open-record-constructor("foo1", 10, "bar1", 20, "foo2", 30, "bar2", 40)
diff --git a/asterix-app/src/test/resources/runtimets/queries/records/open-record-constructor_02/open-record-constructor_02.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/records/open-record-constructor_02/open-record-constructor_02.3.query.aql
index 972ecb2..9b1ea45 100644
--- a/asterix-app/src/test/resources/runtimets/queries/records/open-record-constructor_02/open-record-constructor_02.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/records/open-record-constructor_02/open-record-constructor_02.3.query.aql
@@ -1,3 +1,4 @@
 use dataverse test;
+set import-private-functions 'true';
 
 open-record-constructor("foo1", 10, "bar1", closed-record-constructor("bar1.1", 10, "bar1.2", 20, "bar1.3", 30, "bar1.4", closed-record-constructor("bar1.4.1", 10, "bar1.4.2", 20, "bar1.4.3", 30, "bar1.4.4", 40), "foo2", 30, "bar2", 40), "foo2", 30, "bar2", 40)
diff --git a/asterix-app/src/test/resources/runtimets/queries/similarity/edit-distance-list-is-filterable/edit-distance-list-is-filterable.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/similarity/edit-distance-list-is-filterable/edit-distance-list-is-filterable.3.query.aql
index 97fbd61..d2dd7e8 100644
--- a/asterix-app/src/test/resources/runtimets/queries/similarity/edit-distance-list-is-filterable/edit-distance-list-is-filterable.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/similarity/edit-distance-list-is-filterable/edit-distance-list-is-filterable.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $a := []
 let $b := [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
diff --git a/asterix-app/src/test/resources/runtimets/queries/similarity/edit-distance-string-is-filterable/edit-distance-string-is-filterable.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/similarity/edit-distance-string-is-filterable/edit-distance-string-is-filterable.3.query.aql
index 9d55ce7..e78037f 100644
--- a/asterix-app/src/test/resources/runtimets/queries/similarity/edit-distance-string-is-filterable/edit-distance-string-is-filterable.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/similarity/edit-distance-string-is-filterable/edit-distance-string-is-filterable.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $a := ""
 let $b := "abcdefghij"
diff --git a/asterix-app/src/test/resources/runtimets/queries/similarity/prefix-len-jaccard/prefix-len-jaccard.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/similarity/prefix-len-jaccard/prefix-len-jaccard.3.query.aql
index 1f61b15..693f83d 100644
--- a/asterix-app/src/test/resources/runtimets/queries/similarity/prefix-len-jaccard/prefix-len-jaccard.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/similarity/prefix-len-jaccard/prefix-len-jaccard.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 for $l in [1]
 return [
diff --git a/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-prefix-check/similarity-jaccard-prefix-check.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-prefix-check/similarity-jaccard-prefix-check.3.query.aql
index 46c0389..6863929 100644
--- a/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-prefix-check/similarity-jaccard-prefix-check.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-prefix-check/similarity-jaccard-prefix-check.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 for $l in [1]
 return [
diff --git a/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-prefix/similarity-jaccard-prefix.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-prefix/similarity-jaccard-prefix.3.query.aql
index 10db026..18de7bf 100644
--- a/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-prefix/similarity-jaccard-prefix.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-prefix/similarity-jaccard-prefix.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 for $l in [1]
 return [
diff --git a/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted-check_ints/similarity-jaccard-sorted-check_ints.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted-check_ints/similarity-jaccard-sorted-check_ints.3.query.aql
index 31c8b1b..2e29289 100644
--- a/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted-check_ints/similarity-jaccard-sorted-check_ints.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted-check_ints/similarity-jaccard-sorted-check_ints.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $a := [ ]
 let $b := [1, 2, 3, 4, 5]
diff --git a/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted-check_query/similarity-jaccard-sorted-check_query.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted-check_query/similarity-jaccard-sorted-check_query.3.query.aql
index a8089ec..69a9a31 100644
--- a/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted-check_query/similarity-jaccard-sorted-check_query.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted-check_query/similarity-jaccard-sorted-check_query.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 for $paper in dataset('DBLP')
 let $paper_tokens := word-tokens($paper.title)
diff --git a/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted-check_strings/similarity-jaccard-sorted-check_strings.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted-check_strings/similarity-jaccard-sorted-check_strings.3.query.aql
index 326b626..9f2bf71 100644
--- a/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted-check_strings/similarity-jaccard-sorted-check_strings.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted-check_strings/similarity-jaccard-sorted-check_strings.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $a := [ ]
 let $b := ["abc", "bcd", "cde", "def", "efg"]
diff --git a/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted_ints/similarity-jaccard-sorted_ints.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted_ints/similarity-jaccard-sorted_ints.3.query.aql
index 0915bd6..61d4372 100644
--- a/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted_ints/similarity-jaccard-sorted_ints.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted_ints/similarity-jaccard-sorted_ints.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $a := [ ]
 let $b := [1, 2, 3, 4, 5]
diff --git a/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted_query/similarity-jaccard-sorted_query.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted_query/similarity-jaccard-sorted_query.3.query.aql
index 6d6e2c8..9f1aa77 100644
--- a/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted_query/similarity-jaccard-sorted_query.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted_query/similarity-jaccard-sorted_query.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 for $paper in dataset('DBLP')
 let $paper_tokens := word-tokens($paper.title)
diff --git a/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted_strings/similarity-jaccard-sorted_strings.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted_strings/similarity-jaccard-sorted_strings.3.query.aql
index 2271db0..907538f 100644
--- a/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted_strings/similarity-jaccard-sorted_strings.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard-sorted_strings/similarity-jaccard-sorted_strings.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $a := [ ]
 let $b := ["abc", "bcd", "cde", "def", "efg"]
diff --git a/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard_ints/similarity-jaccard_ints.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard_ints/similarity-jaccard_ints.3.query.aql
index a76a82a..8bfb1e0 100644
--- a/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard_ints/similarity-jaccard_ints.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard_ints/similarity-jaccard_ints.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $a := [ ]
 let $b := [1, 2, 3, 4, 5]
diff --git a/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard_query/similarity-jaccard_query.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard_query/similarity-jaccard_query.3.query.aql
index 86cc50f..a731d94 100644
--- a/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard_query/similarity-jaccard_query.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard_query/similarity-jaccard_query.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 for $paper in dataset('DBLP')
 let $paper_tokens := word-tokens($paper.title)
diff --git a/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard_strings/similarity-jaccard_strings.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard_strings/similarity-jaccard_strings.3.query.aql
index b7c627e..3db4369 100644
--- a/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard_strings/similarity-jaccard_strings.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/similarity/similarity-jaccard_strings/similarity-jaccard_strings.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $a := [ ]
 let $b := ["abc", "bcd", "cde", "def", "efg"]
diff --git a/asterix-app/src/test/resources/runtimets/queries/string/string-equal1/string-equal1.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/string/string-equal1/string-equal1.3.query.aql
index 954ac57..3e3e57a 100644
--- a/asterix-app/src/test/resources/runtimets/queries/string/string-equal1/string-equal1.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/string/string-equal1/string-equal1.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $c1 := string-equal("test","tess")
 return {"result1": $c1}
diff --git a/asterix-app/src/test/resources/runtimets/queries/string/string-equal2/string-equal2.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/string/string-equal2/string-equal2.3.query.aql
index 66af45d..77b837a 100644
--- a/asterix-app/src/test/resources/runtimets/queries/string/string-equal2/string-equal2.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/string/string-equal2/string-equal2.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $c1 := string-equal("test","test")
 return {"result1": $c1}
diff --git a/asterix-app/src/test/resources/runtimets/queries/string/string-equal3/string-equal3.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/string/string-equal3/string-equal3.3.query.aql
index fe3b341..87c0123 100644
--- a/asterix-app/src/test/resources/runtimets/queries/string/string-equal3/string-equal3.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/string/string-equal3/string-equal3.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $c1 := string-equal("test11","test")
 return {"result1": $c1}
diff --git a/asterix-app/src/test/resources/runtimets/queries/string/string-equal4/string-equal4.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/string/string-equal4/string-equal4.3.query.aql
index 2b5166c..1128cc5 100644
--- a/asterix-app/src/test/resources/runtimets/queries/string/string-equal4/string-equal4.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/string/string-equal4/string-equal4.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $c1 := string-equal("","")
 let $c3 := string-equal(null,"")
diff --git a/asterix-app/src/test/resources/runtimets/queries/subset-collection/01/01.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/subset-collection/01/01.3.query.aql
index 05612a3..4341d92 100644
--- a/asterix-app/src/test/resources/runtimets/queries/subset-collection/01/01.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/subset-collection/01/01.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 for $l in subset-collection([1], 0, 1)
 return $l
diff --git a/asterix-app/src/test/resources/runtimets/queries/subset-collection/02/02.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/subset-collection/02/02.3.query.aql
index 14b3e4e..666eb76 100644
--- a/asterix-app/src/test/resources/runtimets/queries/subset-collection/02/02.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/subset-collection/02/02.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 for $l in subset-collection([1, 2, 3, 4], 1, 2)
 return $l
diff --git a/asterix-app/src/test/resources/runtimets/queries/subset-collection/03/03.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/subset-collection/03/03.3.query.aql
index 248bff3..aaaf487 100644
--- a/asterix-app/src/test/resources/runtimets/queries/subset-collection/03/03.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/subset-collection/03/03.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 for $l in subset-collection([1, 2, 3, 4], 0, 0)
 return $l
diff --git a/asterix-app/src/test/resources/runtimets/queries/subset-collection/04/04.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/subset-collection/04/04.3.query.aql
index 0fde28a..1b41033 100644
--- a/asterix-app/src/test/resources/runtimets/queries/subset-collection/04/04.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/subset-collection/04/04.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 for $l in [1]
 return subset-collection([1, 2, 3, 4], 1, 2)
diff --git a/asterix-app/src/test/resources/runtimets/queries/subset-collection/05/05.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/subset-collection/05/05.3.query.aql
index 2403754..7d369ef 100644
--- a/asterix-app/src/test/resources/runtimets/queries/subset-collection/05/05.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/subset-collection/05/05.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 for $l in subset-collection(['a', 'b', 'c', 'd'], 1, 2)
 return $l
diff --git a/asterix-app/src/test/resources/runtimets/queries/subset-collection/06/06.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/subset-collection/06/06.3.query.aql
index c8e78af..e4dd90d 100644
--- a/asterix-app/src/test/resources/runtimets/queries/subset-collection/06/06.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/subset-collection/06/06.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 for $l in subset-collection([1, 2, 3, 4], 2, 2)
 return $l
diff --git a/asterix-app/src/test/resources/runtimets/queries/subset-collection/07/07.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/subset-collection/07/07.3.query.aql
index 5166adf..d651d3c 100644
--- a/asterix-app/src/test/resources/runtimets/queries/subset-collection/07/07.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/subset-collection/07/07.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 for $l in subset-collection([1, 2, 3, 4], 2, 10)
 return $l
diff --git a/asterix-app/src/test/resources/runtimets/queries/temporal/calendar_duration/calendar_duration.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/temporal/calendar_duration/calendar_duration.3.query.aql
index 291d296..016f3b3 100644
--- a/asterix-app/src/test/resources/runtimets/queries/temporal/calendar_duration/calendar_duration.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/temporal/calendar_duration/calendar_duration.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $t1 := datetime("1987-11-19T23:49:23.938")
 let $t2 := date("-1328-10-23")
diff --git a/asterix-app/src/test/resources/runtimets/queries/temporal/date_functions/date_functions.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/temporal/date_functions/date_functions.3.query.aql
index b748429..143a02b 100644
--- a/asterix-app/src/test/resources/runtimets/queries/temporal/date_functions/date_functions.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/temporal/date_functions/date_functions.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $d1 := date-from-unix-time-in-days(15600)
 let $null1 := date-from-unix-time-in-days(null)
@@ -20,4 +21,4 @@
 let $null5 := subtract-date(null, $d2)
 let $null6 := subtract-date($d5, null)
 
-return { "date1": $d1, "date2": $d2, "date3": $d3, "date4": $d4, "date5": $d5, "duration1": $dr3, "duration2": $dr4, "c1": $c1, "c2": $c2, "null1": $null1, "null2": $null2, "null3": $null3, "null4": $null4, "null5": $null5, "null6": $null6 }
\ No newline at end of file
+return { "date1": $d1, "date2": $d2, "date3": $d3, "date4": $d4, "date5": $d5, "duration1": $dr3, "duration2": $dr4, "c1": $c1, "c2": $c2, "null1": $null1, "null2": $null2, "null3": $null3, "null4": $null4, "null5": $null5, "null6": $null6 }
diff --git a/asterix-app/src/test/resources/runtimets/queries/temporal/datetime_functions/datetime_functions.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/temporal/datetime_functions/datetime_functions.3.query.aql
index ea6c2a8..3d24549 100644
--- a/asterix-app/src/test/resources/runtimets/queries/temporal/datetime_functions/datetime_functions.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/temporal/datetime_functions/datetime_functions.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $dt1 := datetime-from-unix-time-in-ms(956007429)
 let $null1 := datetime-from-unix-time-in-ms(null)
diff --git a/asterix-app/src/test/resources/runtimets/queries/temporal/duration_comps/duration_comps.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/temporal/duration_comps/duration_comps.3.query.aql
index 77fcc4f..d6f2346 100644
--- a/asterix-app/src/test/resources/runtimets/queries/temporal/duration_comps/duration_comps.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/temporal/duration_comps/duration_comps.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $dr1 := duration("-P3D")
 let $dr2 := duration("P1D")
@@ -8,4 +9,4 @@
 let $dr6 := duration-from-months(months-of-year-month-duration($dr3))
 let $dr7 := duration-from-ms(ms-of-day-time-duration($dr1))
 
-return { "yearMonthGreaterComp" : year-month-duration-greater-than($dr4, $dr3), "dayTimeGreaterComp" : day-time-duration-greater-than($dr2, $dr1), "yearMonthLessComp" : year-month-duration-less-than($dr4, $dr3), "dayTimeLessComp" : day-time-duration-less-than($dr2, $dr1), "equal1": duration-equal($dr2, $dr5), "equal2": duration-equal($dr1, $dr5), "equal3": duration-equal($dr6, $dr3), "equal4": duration-equal($dr7, $dr1) }
\ No newline at end of file
+return { "yearMonthGreaterComp" : year-month-duration-greater-than($dr4, $dr3), "dayTimeGreaterComp" : day-time-duration-greater-than($dr2, $dr1), "yearMonthLessComp" : year-month-duration-less-than($dr4, $dr3), "dayTimeLessComp" : day-time-duration-less-than($dr2, $dr1), "equal1": duration-equal($dr2, $dr5), "equal2": duration-equal($dr1, $dr5), "equal3": duration-equal($dr6, $dr3), "equal4": duration-equal($dr7, $dr1) }
diff --git a/asterix-app/src/test/resources/runtimets/queries/temporal/time_functions/time_functions.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/temporal/time_functions/time_functions.3.query.aql
index c042df0..86a4a72 100644
--- a/asterix-app/src/test/resources/runtimets/queries/temporal/time_functions/time_functions.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/temporal/time_functions/time_functions.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $t1 := time-from-unix-time-in-ms(1560074)
 let $null1 := time-from-unix-time-in-ms(null)
diff --git a/asterix-app/src/test/resources/runtimets/queries/tokenizers/counthashed-gram-tokens_01/counthashed-gram-tokens_01.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/tokenizers/counthashed-gram-tokens_01/counthashed-gram-tokens_01.3.query.aql
index 7b2148c..59937c7 100644
--- a/asterix-app/src/test/resources/runtimets/queries/tokenizers/counthashed-gram-tokens_01/counthashed-gram-tokens_01.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/tokenizers/counthashed-gram-tokens_01/counthashed-gram-tokens_01.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $txt := "Jürgen S. Generic's Car"
 let $tokens := counthashed-gram-tokens($txt, 3, false)
diff --git a/asterix-app/src/test/resources/runtimets/queries/tokenizers/counthashed-gram-tokens_02/counthashed-gram-tokens_02.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/tokenizers/counthashed-gram-tokens_02/counthashed-gram-tokens_02.3.query.aql
index f871047..1b86c69 100644
--- a/asterix-app/src/test/resources/runtimets/queries/tokenizers/counthashed-gram-tokens_02/counthashed-gram-tokens_02.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/tokenizers/counthashed-gram-tokens_02/counthashed-gram-tokens_02.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $txt := "Jürgen S. Generic's Car"
 let $tokens := counthashed-gram-tokens($txt, 3, true)
diff --git a/asterix-app/src/test/resources/runtimets/queries/tokenizers/counthashed-word-tokens_01/counthashed-word-tokens_01.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/tokenizers/counthashed-word-tokens_01/counthashed-word-tokens_01.3.query.aql
index 3d44cfb..f124c3c 100644
--- a/asterix-app/src/test/resources/runtimets/queries/tokenizers/counthashed-word-tokens_01/counthashed-word-tokens_01.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/tokenizers/counthashed-word-tokens_01/counthashed-word-tokens_01.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $txt := "Hello World, I would like to inform you of the importance of Foo Bar. Yes, Foo Bar. Jürgen."
 let $tokens := counthashed-word-tokens($txt)
diff --git a/asterix-app/src/test/resources/runtimets/queries/tokenizers/gram-tokens_01/gram-tokens_01.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/tokenizers/gram-tokens_01/gram-tokens_01.3.query.aql
index ae3a339..e25dc2a 100644
--- a/asterix-app/src/test/resources/runtimets/queries/tokenizers/gram-tokens_01/gram-tokens_01.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/tokenizers/gram-tokens_01/gram-tokens_01.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $txt := "Jürgen S. Generic's Car"
 let $tokens := gram-tokens($txt, 3, false)
diff --git a/asterix-app/src/test/resources/runtimets/queries/tokenizers/gram-tokens_02/gram-tokens_02.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/tokenizers/gram-tokens_02/gram-tokens_02.3.query.aql
index 1fa90ca..4dbcf94 100644
--- a/asterix-app/src/test/resources/runtimets/queries/tokenizers/gram-tokens_02/gram-tokens_02.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/tokenizers/gram-tokens_02/gram-tokens_02.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $txt := "Jürgen S. Generic's Car"
 let $tokens := gram-tokens($txt, 3, true)
diff --git a/asterix-app/src/test/resources/runtimets/queries/tokenizers/hashed-gram-tokens_01/hashed-gram-tokens_01.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/tokenizers/hashed-gram-tokens_01/hashed-gram-tokens_01.3.query.aql
index 694ef83..66ebdc6 100644
--- a/asterix-app/src/test/resources/runtimets/queries/tokenizers/hashed-gram-tokens_01/hashed-gram-tokens_01.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/tokenizers/hashed-gram-tokens_01/hashed-gram-tokens_01.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $txt := "Jürgen S. Generic's Car"
 let $tokens := hashed-gram-tokens($txt, 3, false)
diff --git a/asterix-app/src/test/resources/runtimets/queries/tokenizers/hashed-gram-tokens_02/hashed-gram-tokens_02.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/tokenizers/hashed-gram-tokens_02/hashed-gram-tokens_02.3.query.aql
index 8e46d4a..4fdba79 100644
--- a/asterix-app/src/test/resources/runtimets/queries/tokenizers/hashed-gram-tokens_02/hashed-gram-tokens_02.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/tokenizers/hashed-gram-tokens_02/hashed-gram-tokens_02.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $txt := "Jürgen S. Generic's Car"
 let $tokens := hashed-gram-tokens($txt, 3, true)
diff --git a/asterix-app/src/test/resources/runtimets/queries/tokenizers/hashed-word-tokens_01/hashed-word-tokens_01.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/tokenizers/hashed-word-tokens_01/hashed-word-tokens_01.3.query.aql
index 62d8387..c87362e 100644
--- a/asterix-app/src/test/resources/runtimets/queries/tokenizers/hashed-word-tokens_01/hashed-word-tokens_01.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/tokenizers/hashed-word-tokens_01/hashed-word-tokens_01.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse test;
+set import-private-functions 'true';
 
 let $txt := "Hello World, I would like to inform you of the importance of Foo Bar. Yes, Foo Bar. Jürgen."
 let $tokens := hashed-word-tokens($txt)
diff --git a/asterix-app/src/test/resources/runtimets/queries/tpch/q19_discounted_revenue/q19_discounted_revenue.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/tpch/q19_discounted_revenue/q19_discounted_revenue.3.query.aql
index 3fd46d5..ec10939 100644
--- a/asterix-app/src/test/resources/runtimets/queries/tpch/q19_discounted_revenue/q19_discounted_revenue.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/tpch/q19_discounted_revenue/q19_discounted_revenue.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse tpch;
+set import-private-functions 'true';
 
 sum( 
 for $l in dataset('LineItem')
diff --git a/asterix-app/src/test/resources/runtimets/queries/tpch/q1_pricing_summary_report_nt/q1_pricing_summary_report_nt.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/tpch/q1_pricing_summary_report_nt/q1_pricing_summary_report_nt.3.query.aql
index b6d6c48..c27be0a 100644
--- a/asterix-app/src/test/resources/runtimets/queries/tpch/q1_pricing_summary_report_nt/q1_pricing_summary_report_nt.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/tpch/q1_pricing_summary_report_nt/q1_pricing_summary_report_nt.3.query.aql
@@ -1,4 +1,5 @@
 use dataverse tpch;
+set import-private-functions 'true';
  
 for $l in dataset('LineItem')
 where $l.l_shipdate <= '1998-09-02'
diff --git a/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue201/query-issue201.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue201/query-issue201.3.query.aql
index 6dc27e2..ac37c1a 100644
--- a/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue201/query-issue201.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue201/query-issue201.3.query.aql
@@ -5,6 +5,7 @@
  * Date         : 26th November 2012
  */
 
+set import-private-functions 'true';
 
 let $x:=range(1,100)
 for $i in $x
diff --git a/asterix-aql/src/main/java/edu/uci/ics/asterix/aql/rewrites/AqlRewriter.java b/asterix-aql/src/main/java/edu/uci/ics/asterix/aql/rewrites/AqlRewriter.java
index e9aab27..d581b06 100644
--- a/asterix-aql/src/main/java/edu/uci/ics/asterix/aql/rewrites/AqlRewriter.java
+++ b/asterix-aql/src/main/java/edu/uci/ics/asterix/aql/rewrites/AqlRewriter.java
@@ -69,6 +69,7 @@
 import edu.uci.ics.asterix.common.functions.FunctionSignature;
 import edu.uci.ics.asterix.metadata.MetadataManager;
 import edu.uci.ics.asterix.metadata.MetadataTransactionContext;
+import edu.uci.ics.asterix.metadata.declared.AqlMetadataProvider;
 import edu.uci.ics.asterix.metadata.entities.Function;
 import edu.uci.ics.asterix.om.functions.AsterixBuiltinFunctions;
 import edu.uci.ics.asterix.om.functions.AsterixFunction;
@@ -81,6 +82,7 @@
     private final List<FunctionDecl> declaredFunctions;
     private final AqlRewritingContext context;
     private final MetadataTransactionContext mdTxnCtx;
+    private final AqlMetadataProvider metadataProvider;
 
     private enum DfsColor {
         WHITE,
@@ -88,11 +90,12 @@
         BLACK
     }
 
-    public AqlRewriter(List<FunctionDecl> declaredFunctions, Query topExpr, MetadataTransactionContext mdTxnCtx) {
+    public AqlRewriter(List<FunctionDecl> declaredFunctions, Query topExpr, AqlMetadataProvider metadataProvider) {
         this.topExpr = topExpr;
         context = new AqlRewritingContext(topExpr.getVarCounter());
         this.declaredFunctions = declaredFunctions;
-        this.mdTxnCtx = mdTxnCtx;
+        this.mdTxnCtx = metadataProvider.getMetadataTxnContext();
+        this.metadataProvider = metadataProvider;
     }
 
     public Query getExpr() {
@@ -168,8 +171,16 @@
                     buildOtherUdfs(functionDecl.getFuncBody(), functionDecls, declaredFunctions);
                 }
             } else {
-                if (isBuiltinFunction(signature, AsterixBuiltinFunctions.FunctionNamespace.ASTERIX_PUBLIC)) {
+                String value = metadataProvider.getConfig().get(FunctionUtils.IMPORT_PRIVATE_FUNCTIONS);
+                boolean includePrivateFunctions = (value != null) ? Boolean.valueOf(value.toLowerCase()) : false;
+                signature.setNamespace(AsterixBuiltinFunctions.FunctionNamespace.ASTERIX_PUBLIC.name());
+                if (isBuiltinFunction(signature)) {
                     continue;
+                } else if (includePrivateFunctions) {
+                    signature.setNamespace(AsterixBuiltinFunctions.FunctionNamespace.ASTERIX_PRIVATE.name());
+                    if (isBuiltinFunction(signature)) {
+                        continue;
+                    }
                 } else {
                     throw new AsterixException(" unknown function " + signature);
                 }
@@ -189,15 +200,14 @@
 
     }
 
-    private boolean isBuiltinFunction(FunctionSignature functionSignature,
-            AsterixBuiltinFunctions.FunctionNamespace namespace) {
-        if (AsterixBuiltinFunctions.isBuiltinCompilerFunction(new FunctionIdentifier(namespace.name(),
-                functionSignature.getName(), functionSignature.getArity()))) {
+    private boolean isBuiltinFunction(FunctionSignature signature) {
+        if (AsterixBuiltinFunctions.isBuiltinCompilerFunction(new FunctionIdentifier(signature.getNamespace(),
+                signature.getName(), signature.getArity()))) {
             return true;
         }
 
         if (AsterixBuiltinFunctions.isBuiltinCompilerFunction(new FunctionIdentifier(
-                AlgebricksBuiltinFunctions.ALGEBRICKS_NS, functionSignature.getName(), functionSignature.getArity()))) {
+                AlgebricksBuiltinFunctions.ALGEBRICKS_NS, signature.getName(), signature.getArity()))) {
             return true;
         }
 
diff --git a/asterix-aql/src/main/java/edu/uci/ics/asterix/aql/util/FunctionUtils.java b/asterix-aql/src/main/java/edu/uci/ics/asterix/aql/util/FunctionUtils.java
index e3f3641..87525c9 100644
--- a/asterix-aql/src/main/java/edu/uci/ics/asterix/aql/util/FunctionUtils.java
+++ b/asterix-aql/src/main/java/edu/uci/ics/asterix/aql/util/FunctionUtils.java
@@ -32,6 +32,8 @@
 
 public class FunctionUtils {
 
+    public static final String IMPORT_PRIVATE_FUNCTIONS = "import-private-functions";
+
     public static FunctionDecl getFunctionDecl(Function function) throws AsterixException {
         String functionBody = function.getFunctionBody();
         List<String> params = function.getParams();
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/functions/FunctionSignature.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/functions/FunctionSignature.java
index 188593c..563b2cf 100644
--- a/asterix-common/src/main/java/edu/uci/ics/asterix/common/functions/FunctionSignature.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/functions/FunctionSignature.java
@@ -5,10 +5,10 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 
 public class FunctionSignature implements Serializable {
-    private final String namespace;
-    private final String name;
-    private final int arity;
-    private final String rep;
+    private  String namespace;
+    private  String name;
+    private  int arity;
+    private  String rep;
 
     public FunctionSignature(String namespace, String name, int arity) {
         this.namespace = namespace;
@@ -50,4 +50,16 @@
         return arity;
     }
 
+    public void setNamespace(String namespace) {
+        this.namespace = namespace;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public void setArity(int arity) {
+        this.arity = arity;
+    }
+
 }