diff --git a/asterix-algebra/src/main/java/edu/uci/ics/asterix/translator/AqlExpressionToPlanTranslator.java b/asterix-algebra/src/main/java/edu/uci/ics/asterix/translator/AqlExpressionToPlanTranslator.java
index f2e42de..a2545ff 100644
--- a/asterix-algebra/src/main/java/edu/uci/ics/asterix/translator/AqlExpressionToPlanTranslator.java
+++ b/asterix-algebra/src/main/java/edu/uci/ics/asterix/translator/AqlExpressionToPlanTranslator.java
@@ -74,6 +74,7 @@
 import edu.uci.ics.asterix.common.config.AsterixMetadataProperties;
 import edu.uci.ics.asterix.common.config.DatasetConfig.DatasetType;
 import edu.uci.ics.asterix.common.exceptions.AsterixException;
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
 import edu.uci.ics.asterix.common.functions.FunctionSignature;
 import edu.uci.ics.asterix.formats.base.IDataFormat;
 import edu.uci.ics.asterix.metadata.MetadataException;
@@ -90,7 +91,6 @@
 import edu.uci.ics.asterix.om.base.AString;
 import edu.uci.ics.asterix.om.constants.AsterixConstantValue;
 import edu.uci.ics.asterix.om.functions.AsterixBuiltinFunctions;
-import edu.uci.ics.asterix.om.functions.AsterixBuiltinFunctions.FunctionNamespace;
 import edu.uci.ics.asterix.om.functions.AsterixFunctionInfo;
 import edu.uci.ics.asterix.om.types.BuiltinType;
 import edu.uci.ics.asterix.om.types.IAType;
@@ -506,14 +506,10 @@
         if (builtinAquafi != null) {
             fi = builtinAquafi;
         } else {
-            fi = new FunctionIdentifier(FunctionNamespace.ASTERIX_PUBLIC.name(), functionName, arity);
+            fi = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, functionName, arity);
             afi = AsterixBuiltinFunctions.lookupFunction(fi);
             if (afi == null) {
-                fi = new FunctionIdentifier(FunctionNamespace.ASTERIX_PRIVATE.name(), functionName, arity);
-                afi = AsterixBuiltinFunctions.lookupFunction(fi);
-                if (afi == null) {
-                    return null;
-                }
+                return null;
             }
         }
         if (AsterixBuiltinFunctions.isBuiltinAggregateFunction(fi)) {
diff --git a/asterix-algebra/src/main/java/edu/uci/ics/asterix/translator/AqlPlusExpressionToPlanTranslator.java b/asterix-algebra/src/main/java/edu/uci/ics/asterix/translator/AqlPlusExpressionToPlanTranslator.java
index 50e79a5..0f636a9 100644
--- a/asterix-algebra/src/main/java/edu/uci/ics/asterix/translator/AqlPlusExpressionToPlanTranslator.java
+++ b/asterix-algebra/src/main/java/edu/uci/ics/asterix/translator/AqlPlusExpressionToPlanTranslator.java
@@ -90,7 +90,6 @@
 import edu.uci.ics.asterix.om.base.AString;
 import edu.uci.ics.asterix.om.constants.AsterixConstantValue;
 import edu.uci.ics.asterix.om.functions.AsterixBuiltinFunctions;
-import edu.uci.ics.asterix.om.functions.AsterixBuiltinFunctions.FunctionNamespace;
 import edu.uci.ics.asterix.om.functions.AsterixFunctionInfo;
 import edu.uci.ics.asterix.om.types.ARecordType;
 import edu.uci.ics.asterix.om.types.BuiltinType;
@@ -465,14 +464,10 @@
         if (builtinAquafi != null) {
             fi = builtinAquafi;
         } else {
-            fi = new FunctionIdentifier(FunctionNamespace.ASTERIX_PUBLIC.name(), signature.getName());
+            fi = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, signature.getName());
             FunctionIdentifier builtinAsterixFi = AsterixBuiltinFunctions.getBuiltinFunctionIdentifier(fi);
             if (builtinAsterixFi != null) {
                 fi = builtinAsterixFi;
-            } else {
-                fi = new FunctionIdentifier(FunctionNamespace.ASTERIX_PRIVATE.name(), signature.getName());
-                builtinAsterixFi = AsterixBuiltinFunctions.getBuiltinFunctionIdentifier(fi);
-                fi = builtinAsterixFi;
             }
         }
         AbstractFunctionCallExpression f;
diff --git a/asterix-algebra/src/main/java/edu/uci/ics/asterix/translator/CompiledStatements.java b/asterix-algebra/src/main/java/edu/uci/ics/asterix/translator/CompiledStatements.java
index a91f2eb..49e2ed6 100644
--- a/asterix-algebra/src/main/java/edu/uci/ics/asterix/translator/CompiledStatements.java
+++ b/asterix-algebra/src/main/java/edu/uci/ics/asterix/translator/CompiledStatements.java
@@ -35,6 +35,7 @@
 import edu.uci.ics.asterix.aql.expression.WhereClause;
 import edu.uci.ics.asterix.aql.literal.StringLiteral;
 import edu.uci.ics.asterix.common.config.DatasetConfig.IndexType;
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
 import edu.uci.ics.asterix.common.functions.FunctionSignature;
 import edu.uci.ics.asterix.metadata.declared.AqlMetadataProvider;
 import edu.uci.ics.asterix.metadata.entities.Dataset;
@@ -496,7 +497,7 @@
             arguments.add(argumentLiteral);
 
             CallExpr callExpression = new CallExpr(new FunctionSignature(
-                    AsterixBuiltinFunctions.FunctionNamespace.ASTERIX_PUBLIC.name(), "dataset", 1), arguments);
+                    FunctionConstants.ASTERIX_NS, "dataset", 1), arguments);
             List<Clause> clauseList = new ArrayList<Clause>();
             Clause forClause = new ForClause(var, callExpression);
             clauseList.add(forClause);
diff --git a/asterix-app/data/tinysocial/fbm.adm b/asterix-app/data/tinysocial/fbm.adm
new file mode 100644
index 0000000..58d7f08
--- /dev/null
+++ b/asterix-app/data/tinysocial/fbm.adm
@@ -0,0 +1,15 @@
+{"message-id":1,"author-id":3,"in-response-to":2,"sender-location":point("47.16,77.75"),"message":" love sprint its shortcut-menu is awesome:)"}
+{"message-id":2,"author-id":1,"in-response-to":4,"sender-location":point("41.66,80.87"),"message":" dislike iphone its touch-screen is horrible"}
+{"message-id":3,"author-id":2,"in-response-to":4,"sender-location":point("48.09,81.01"),"message":" like samsung the plan is amazing"}
+{"message-id":4,"author-id":1,"in-response-to":2,"sender-location":point("37.73,97.04"),"message":" can't stand at&t the network is horrible:("}
+{"message-id":5,"author-id":6,"in-response-to":2,"sender-location":point("34.7,90.76"),"message":" love sprint the customization is mind-blowing"}
+{"message-id":6,"author-id":2,"in-response-to":1,"sender-location":point("31.5,75.56"),"message":" like t-mobile its platform is mind-blowing"}
+{"message-id":7,"author-id":5,"in-response-to":15,"sender-location":point("32.91,85.05"),"message":" dislike sprint the speed is horrible"}
+{"message-id":8,"author-id":1,"in-response-to":11,"sender-location":point("40.33,80.87"),"message":" like verizon the 3G is awesome:)"}
+{"message-id":9,"author-id":3,"in-response-to":12,"sender-location":point("34.45,96.48"),"message":" love verizon its wireless is good"}
+{"message-id":10,"author-id":1,"in-response-to":12,"sender-location":point("42.5,70.01"),"message":" can't stand motorola the touch-screen is terrible"}
+{"message-id":11,"author-id":1,"in-response-to":1,"sender-location":point("38.97,77.49"),"message":" can't stand at&t its plan is terrible"}
+{"message-id":12,"author-id":10,"in-response-to":6,"sender-location":point("42.26,77.76"),"message":" can't stand t-mobile its voicemail-service is OMG:("}
+{"message-id":13,"author-id":10,"in-response-to":4,"sender-location":point("42.77,78.92"),"message":" dislike iphone the voice-command is bad:("}
+{"message-id":14,"author-id":9,"in-response-to":12,"sender-location":point("41.33,85.28"),"message":" love at&t its 3G is good:)"}
+{"message-id":15,"author-id":7,"in-response-to":11,"sender-location":point("44.47,67.11"),"message":" like iphone the voicemail-service is awesome"}
diff --git a/asterix-app/data/tinysocial/fbu.adm b/asterix-app/data/tinysocial/fbu.adm
new file mode 100644
index 0000000..7e99ea4
--- /dev/null
+++ b/asterix-app/data/tinysocial/fbu.adm
@@ -0,0 +1,10 @@
+{"id":1,"alias":"Margarita","name":"MargaritaStoddard","user-since":datetime("2012-08-20T10:10:00"),"friend-ids":{{2,3,6,10}},"employment":[{"organization-name":"Codetechno","start-date":date("2006-08-06")}]}
+{"id":2,"alias":"Isbel","name":"IsbelDull","user-since":datetime("2011-01-22T10:10:00"),"friend-ids":{{1,4}},"employment":[{"organization-name":"Hexviafind","start-date":date("2010-04-27")}]}
+{"id":3,"alias":"Emory","name":"EmoryUnk","user-since":datetime("2012-07-10T10:10:00"),"friend-ids":{{1,5,8,9}},"employment":[{"organization-name":"geomedia","start-date":date("2010-06-17"),"end-date":date("2010-01-26")}]}
+{"id":4,"alias":"Nicholas","name":"NicholasStroh","user-since":datetime("2010-12-27T10:10:00"),"friend-ids":{{2}},"employment":[{"organization-name":"Zamcorporation","start-date":date("2010-06-08")}]}
+{"id":5,"alias":"Von","name":"VonKemble","user-since":datetime("2010-01-05T10:10:00"),"friend-ids":{{3,6,10}},"employment":[{"organization-name":"Kongreen","start-date":date("2010-11-27")}]}
+{"id":6,"alias":"Willis","name":"WillisWynne","user-since":datetime("2005-01-17T10:10:00"),"friend-ids":{{1,3,7}},"employment":[{"organization-name":"jaydax","start-date":date("2009-05-15")}]}
+{"id":7,"alias":"Suzanna","name":"SuzannaTillson","user-since":datetime("2012-08-07T10:10:00"),"friend-ids":{{6}},"employment":[{"organization-name":"Labzatron","start-date":date("2011-04-19")}]}
+{"id":8,"alias":"Nila","name":"NilaMilliron","user-since":datetime("2008-01-01T10:10:00"),"friend-ids":{{3}},"employment":[{"organization-name":"Plexlane","start-date":date("2010-02-28")}]}
+{"id":9,"alias":"Woodrow","name":"WoodrowNehling","user-since":datetime("2005-09-20T10:10:00"),"friend-ids":{{3,10}},"employment":[{"organization-name":"Zuncan","start-date":date("2003-04-22"),"end-date":date("2009-12-13")}]}
+{"id":10,"alias":"Bram","name":"BramHatch","user-since":datetime("2010-10-16T10:10:00"),"friend-ids":{{1,5,9}},"employment":[{"organization-name":"physcane","start-date":date("2007-06-05"),"end-date":date("2011-11-05")}]}
diff --git a/asterix-app/data/tinysocial/twm.adm b/asterix-app/data/tinysocial/twm.adm
index d18c70f..fa764af 100644
--- a/asterix-app/data/tinysocial/twm.adm
+++ b/asterix-app/data/tinysocial/twm.adm
@@ -9,4 +9,4 @@
 {"tweetid":"9","user":{"screen-name":"NathanGiesen@211","lang":"en","friends_count":39339,"statuses_count":473,"name":"Nathan Giesen","followers_count":49416},"sender-location":point("36.86,74.62"),"send-time":datetime("2012-07-21T10:10:00"),"referred-topics":{{"verizon","voicemail-service"}},"message-text":" love verizon its voicemail-service is awesome"}
 {"tweetid":"10","user":{"screen-name":"ColineGeyer@63","lang":"en","friends_count":121,"statuses_count":362,"name":"Coline Geyer","followers_count":17159},"sender-location":point("29.15,76.53"),"send-time":datetime("2008-01-26T10:10:00"),"referred-topics":{{"verizon","voice-clarity"}},"message-text":" hate verizon its voice-clarity is OMG:("}
 {"tweetid":"11","user":{"screen-name":"NilaMilliron_tw","lang":"en","friends_count":445,"statuses_count":164,"name":"Nila Milliron","followers_count":22649},"sender-location":point("37.59,68.42"),"send-time":datetime("2008-03-09T10:10:00"),"referred-topics":{{"iphone","platform"}},"message-text":" can't stand iphone its platform is terrible"}
-{"tweetid":"12","user":{"screen-name":"OliJackson_512","lang":"en","friends_count":445,"statuses_count":164,"name":"Oli Jackson","followers_count":22649},"sender-location":point("24.82,94.63"),"send-time":datetime("2010-02-13T10:10:00"),"referred-topics":{{"samsung","voice-command"}},"message-text":" like samsung the voice-command is amazing:)"}
\ No newline at end of file
+{"tweetid":"12","user":{"screen-name":"OliJackson_512","lang":"en","friends_count":445,"statuses_count":164,"name":"Oli Jackson","followers_count":22649},"sender-location":point("24.82,94.63"),"send-time":datetime("2010-02-13T10:10:00"),"referred-topics":{{"samsung","voice-command"}},"message-text":" like samsung the voice-command is amazing:)"}
diff --git a/asterix-app/data/tinysocial/twu.adm b/asterix-app/data/tinysocial/twu.adm
new file mode 100644
index 0000000..32a1917
--- /dev/null
+++ b/asterix-app/data/tinysocial/twu.adm
@@ -0,0 +1,4 @@
+{"screen-name":"NathanGiesen@211","lang":"en","friends_count":18,"statuses_count":473,"name":"Nathan Giesen","followers_count":49416}
+{"screen-name":"ColineGeyer@63","lang":"en","friends_count":121,"statuses_count":362,"name":"Coline Geyer","followers_count":17159}
+{"screen-name":"NilaMilliron_tw","lang":"en","friends_count":445,"statuses_count":164,"name":"Nila Milliron","followers_count":22649}
+{"screen-name":"ChangEwing_573","lang":"en","friends_count":182,"statuses_count":394,"name":"Chang Ewing","followers_count":32136}
diff --git a/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.1.ddl.aql b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.1.ddl.aql
new file mode 100644
index 0000000..a6af75e
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.1.ddl.aql
@@ -0,0 +1,44 @@
+drop dataverse TinySocial if exists;
+create dataverse TinySocial;
+use dataverse TinySocial;
+
+create type TwitterUserType as open {
+        screen-name: string,
+        lang: string,
+        friends_count: int32,
+        statuses_count: int32,
+        name: string,
+        followers_count: int32
+}
+
+create type TweetMessageType as closed {
+        tweetid: string,
+        user: TwitterUserType,
+        sender-location: point?,
+        send-time: datetime,
+        referred-topics: {{ string }},
+        message-text: string
+}
+
+create type EmploymentType as open {
+        organization-name: string,      
+        start-date: date,
+        end-date: date?
+}
+
+create type FacebookUserType as closed {
+        id: int32,
+        alias: string,
+        name: string,
+        user-since: datetime,
+        friend-ids: {{ int32 }},
+        employment: [EmploymentType]
+}
+
+create type FacebookMessageType as closed {
+        message-id: int32,
+        author-id: int32,
+        in-response-to: int32?,
+        sender-location: point?,
+        message: string
+}
diff --git a/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.10.query.aql b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.10.query.aql
new file mode 100644
index 0000000..24da0fb
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.10.query.aql
@@ -0,0 +1,15 @@
+/**
+* Query 4 - Theta Join
+*/
+
+use dataverse TinySocial;
+
+for $t in dataset TweetMessages
+order by $t.message-text
+return {
+"message": $t.message-text,
+"nearby-messages": for $t2 in dataset TweetMessages
+                        where spatial-distance($t.sender-location, $t2.sender-location) <= 1
+                        order by $t2.message-text
+                        return { "msgtxt":$t2.message-text}
+};
diff --git a/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.11.query.aql b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.11.query.aql
new file mode 100644
index 0000000..5f428cd
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.11.query.aql
@@ -0,0 +1,22 @@
+/**
+* Query 5 - Fuzzy Join 
+*/
+
+use dataverse TinySocial;
+
+set simfunction "edit-distance";
+set simthreshold "3";
+
+for $fbu in dataset FacebookUsers
+order by $fbu.id
+return {
+    "id": $fbu.id,
+    "name": $fbu.name,
+    "similar-users": for $t in dataset TweetMessages
+                        let $tu := $t.user
+                        where $tu.name ~= $fbu.name
+                        return {
+                        "twitter-screenname": $tu.screen-name,
+                        "twitter-name": $tu.name
+                        }
+};
diff --git a/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.12.query.aql b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.12.query.aql
new file mode 100644
index 0000000..869b4ce
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.12.query.aql
@@ -0,0 +1,10 @@
+/**
+* Query 6 - Existential Quantification
+*/
+
+use dataverse TinySocial;
+
+for $fbu in dataset FacebookUsers
+where (some $e in $fbu.employment satisfies is-null($e.end-date)) 
+order by $fbu.id
+return $fbu;
diff --git a/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.13.query.aql b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.13.query.aql
new file mode 100644
index 0000000..056cf9a
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.13.query.aql
@@ -0,0 +1,11 @@
+/**
+* Query 7 - Universal Quantification
+*/
+
+use dataverse TinySocial;
+
+
+for $fbu in dataset FacebookUsers
+where (every $e in $fbu.employment satisfies not(is-null($e.end-date))) 
+order by $fbu.id
+return $fbu;
diff --git a/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.14.query.aql b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.14.query.aql
new file mode 100644
index 0000000..5593669
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.14.query.aql
@@ -0,0 +1,7 @@
+/**
+* Query 8 - Simple Aggregation
+*/
+
+use dataverse TinySocial;
+
+count(for $fbu in dataset FacebookUsers return $fbu);
diff --git a/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.15.query.aql b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.15.query.aql
new file mode 100644
index 0000000..2b45b00
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.15.query.aql
@@ -0,0 +1,13 @@
+/**
+* Query 9-A - Grouping and Aggregation
+*/
+
+use dataverse TinySocial;
+
+for $t in dataset TweetMessages
+group by $uid := $t.user.screen-name with $t
+order by $uid
+return {
+"user": $uid,
+"count": count($t)
+};
diff --git a/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.16.query.aql b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.16.query.aql
new file mode 100644
index 0000000..22c1e50
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.16.query.aql
@@ -0,0 +1,14 @@
+/**
+* Query 9-B - (Hash-Based) Grouping and Aggregation
+*/
+
+use dataverse TinySocial;
+
+for $t in dataset TweetMessages
+/*+ hash*/
+group by $uid := $t.user.screen-name with $t
+order by $uid
+return {
+"user": $uid,
+"count": count($t)
+};
diff --git a/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.17.query.aql b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.17.query.aql
new file mode 100644
index 0000000..9b88ac4
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.17.query.aql
@@ -0,0 +1,15 @@
+/**
+* Query 10 - Grouping and Limits
+*/
+
+use dataverse TinySocial;
+
+for $t in dataset TweetMessages
+group by $uid := $t.user.screen-name with $t
+let $c := count($t)
+order by $c desc
+limit 3
+return {
+        "user": $uid,
+        "count": $c
+};
diff --git a/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.18.query.aql b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.18.query.aql
new file mode 100644
index 0000000..2d69ba2
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.18.query.aql
@@ -0,0 +1,19 @@
+/**
+* Query 11 - Left Outer Fuzzy Join
+*/
+
+use dataverse TinySocial;
+
+set simfunction "jaccard";
+set simthreshold "0.3";
+
+for $t in dataset TweetMessages
+order by $t.tweetid
+return {                     
+    "tweet": $t,               
+    "similar-tweets": for $t2 in dataset TweetMessages
+                        where  $t2.referred-topics ~= $t.referred-topics
+                        and $t2.tweetid != $t.tweetid
+                        order by $t2.tweetid
+                        return $t2.referred-topics
+};
diff --git a/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.19.update.aql b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.19.update.aql
new file mode 100644
index 0000000..2a6fd83
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.19.update.aql
@@ -0,0 +1,23 @@
+/**
+* Inserting New Data
+*/
+
+use dataverse TinySocial;
+
+insert into dataset TweetMessages
+(
+   {"tweetid":"13",
+    "user":
+        {"screen-name":"NathanGiesen@211",
+         "lang":"en",
+         "friends_count":39345,
+         "statuses_count":479,
+         "name":"Nathan Giesen",
+         "followers_count":49420
+        },
+    "sender-location":point("47.44,80.65"),
+    "send-time":datetime("2008-04-26T10:10:35"),
+    "referred-topics":{{"tweeting"}},
+    "message-text":"tweety tweet, my fellow tweeters!"
+   }
+);
diff --git a/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.2.ddl.aql b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.2.ddl.aql
new file mode 100644
index 0000000..1fcc52e
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.2.ddl.aql
@@ -0,0 +1,19 @@
+use dataverse TinySocial;
+
+create dataset FacebookUsers(FacebookUserType)
+primary key id;
+
+create dataset FacebookMessages(FacebookMessageType)
+primary key message-id;
+
+create dataset TwitterUsers(TwitterUserType)
+primary key screen-name;
+
+create dataset TweetMessages(TweetMessageType)
+primary key tweetid
+hints(cardinality=100); 
+
+create index fbUserSinceIdx on FacebookUsers(user-since);
+create index fbAuthorIdx on FacebookMessages(author-id) type btree;
+create index fbSenderLocIndex on FacebookMessages(sender-location) type rtree;
+create index fbMessageIdx on FacebookMessages(message) type keyword;
diff --git a/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.20.query.aql b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.20.query.aql
new file mode 100644
index 0000000..ee7bb3f
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.20.query.aql
@@ -0,0 +1,9 @@
+/**
+* Inserting New Data - Verification
+*/
+
+use dataverse TinySocial;
+
+for $t in dataset TweetMessages
+order by $t.tweetid
+return $t
diff --git a/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.21.update.aql b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.21.update.aql
new file mode 100644
index 0000000..a8912cc
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.21.update.aql
@@ -0,0 +1,7 @@
+/**
+* Deleting Existing Data
+*/
+
+use dataverse TinySocial;
+
+delete $tm from dataset TweetMessages where $tm.tweetid = "13";
diff --git a/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.22.query.aql b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.22.query.aql
new file mode 100644
index 0000000..395b7c1
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.22.query.aql
@@ -0,0 +1,11 @@
+/**
+* Deleting Existing Data - Verification
+*/
+
+use dataverse TinySocial;
+
+count(
+for $t in dataset TweetMessages
+where $t.tweetid = "13"
+return $t
+)
diff --git a/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.3.update.aql b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.3.update.aql
new file mode 100644
index 0000000..92db8a1
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.3.update.aql
@@ -0,0 +1,13 @@
+use dataverse TinySocial;
+
+load dataset FacebookUsers using localfs
+(("path"="nc1://data/tinysocial/fbu.adm"),("format"="adm"));
+
+load dataset FacebookMessages using localfs
+(("path"="nc1://data/tinysocial/fbm.adm"),("format"="adm"));
+
+load dataset TwitterUsers using localfs
+(("path"="nc1://data/tinysocial/twu.adm"),("format"="adm"));
+
+load dataset TweetMessages using localfs
+(("path"="nc1://data/tinysocial/twm.adm"),("format"="adm"));
diff --git a/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.4.query.aql b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.4.query.aql
new file mode 100644
index 0000000..0bf0d89
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.4.query.aql
@@ -0,0 +1,9 @@
+/**
+* Query 0-A - Exact-Match Lookup
+*/
+
+use dataverse TinySocial;
+
+for $user in dataset FacebookUsers
+where $user.id = 8
+return $user;
diff --git a/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.5.query.aql b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.5.query.aql
new file mode 100644
index 0000000..a7b40de
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.5.query.aql
@@ -0,0 +1,10 @@
+/**
+* Query 0-B - Range Scan
+*/
+
+use dataverse TinySocial;
+
+for $user in dataset FacebookUsers
+where $user.id >= 2 and $user.id <= 4
+order by $user.id
+return $user;
diff --git a/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.6.query.aql b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.6.query.aql
new file mode 100644
index 0000000..40234f6
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.6.query.aql
@@ -0,0 +1,11 @@
+/**
+* Query 1 - Other Query Filters 
+*/
+
+use dataverse TinySocial;
+
+for $user in dataset FacebookUsers
+where $user.user-since >= datetime('2010-07-22T00:00:00')
+  and $user.user-since <= datetime('2012-07-29T23:59:59')
+order by $user.id
+return $user;
diff --git a/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.7.query.aql b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.7.query.aql
new file mode 100644
index 0000000..98112ae
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.7.query.aql
@@ -0,0 +1,14 @@
+/**
+* Query 2-A - Equijoin
+*/
+
+use dataverse TinySocial;
+
+for $user in dataset FacebookUsers
+for $message in dataset FacebookMessages
+where $message.author-id = $user.id 
+order by $user.name,$message.message-id
+return {
+"uname": $user.name,
+"message": $message.message
+};
diff --git a/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.8.query.aql b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.8.query.aql
new file mode 100644
index 0000000..e274571
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.8.query.aql
@@ -0,0 +1,14 @@
+/**
+* Query 2-B - Index join
+*/
+
+use dataverse TinySocial;
+
+for $user in dataset FacebookUsers
+for $message in dataset FacebookMessages
+where $message.author-id /*+ indexnl */  = $user.id
+order by $user.name,$message.message-id
+return {
+"uname": $user.name,
+"message": $message.message
+};
diff --git a/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.9.query.aql b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.9.query.aql
new file mode 100644
index 0000000..c4e70c6
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/tinysocial/tinysocial-suite/tinysocial-suite.9.query.aql
@@ -0,0 +1,15 @@
+/**
+* Query 3 - Nested Outer Join
+*/
+
+use dataverse TinySocial;
+
+for $user in dataset FacebookUsers
+order by $user.name
+return {
+"uname": $user.name,
+"messages": for $message in dataset FacebookMessages
+                where $message.author-id = $user.id
+                order by $message.message-id
+                return $message.message
+};
diff --git a/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue172/query-issue172.1.ddl.aql b/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue172/query-issue172.1.ddl.aql
new file mode 100644
index 0000000..e1fab96
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue172/query-issue172.1.ddl.aql
@@ -0,0 +1,7 @@
+/*
+ * Description  : This test case is to verify the fix for issue172
+ 				: https://code.google.com/p/asterixdb/issues/detail?id=172
+ * Expected Res : Success
+ * Date         : 19th May 2013
+ */
+ 
diff --git a/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue172/query-issue172.2.update.aql b/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue172/query-issue172.2.update.aql
new file mode 100644
index 0000000..b08fc74
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue172/query-issue172.2.update.aql
@@ -0,0 +1,7 @@
+/*
+ * Description  : This test case is to verify the fix for issue172
+ 				: https://code.google.com/p/asterixdb/issues/detail?id=172
+ * Expected Res : Success
+ * Date         : 19th May 2013
+ */
+
diff --git a/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue172/query-issue172.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue172/query-issue172.3.query.aql
new file mode 100644
index 0000000..b695ccb
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue172/query-issue172.3.query.aql
@@ -0,0 +1,9 @@
+/*
+ * Description  : This test case is to verify the fix for issue172
+ 				: https://code.google.com/p/asterixdb/issues/detail?id=172
+ * Expected Res : Success
+ * Date         : 19th May 2013
+ */
+
+let $a := string-length(string-concat(["this is a ","test string"]))
+return $a
diff --git a/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/.tinysocial-suite.5.adm.swp b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/.tinysocial-suite.5.adm.swp
new file mode 100644
index 0000000..e7eb7a1
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/.tinysocial-suite.5.adm.swp
Binary files differ
diff --git a/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.10.adm b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.10.adm
new file mode 100644
index 0000000..5451c76
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.10.adm
@@ -0,0 +1,12 @@
+{ "message": " can't stand iphone its platform is terrible", "nearby-messages": [ { "msgtxt": " can't stand iphone its platform is terrible" } ] }
+{ "message": " can't stand motorola its speed is terrible:(", "nearby-messages": [ { "msgtxt": " can't stand motorola its speed is terrible:(" } ] }
+{ "message": " hate verizon its voice-clarity is OMG:(", "nearby-messages": [ { "msgtxt": " hate verizon its voice-clarity is OMG:(" }, { "msgtxt": " like motorola the speed is good:)" } ] }
+{ "message": " like iphone the voice-clarity is good:)", "nearby-messages": [ { "msgtxt": " like iphone the voice-clarity is good:)" } ] }
+{ "message": " like motorola the speed is good:)", "nearby-messages": [ { "msgtxt": " hate verizon its voice-clarity is OMG:(" }, { "msgtxt": " like motorola the speed is good:)" } ] }
+{ "message": " like samsung the platform is good", "nearby-messages": [ { "msgtxt": " like samsung the platform is good" } ] }
+{ "message": " like samsung the voice-command is amazing:)", "nearby-messages": [ { "msgtxt": " like samsung the voice-command is amazing:)" } ] }
+{ "message": " like sprint the voice-command is mind-blowing:)", "nearby-messages": [ { "msgtxt": " like sprint the voice-command is mind-blowing:)" } ] }
+{ "message": " like t-mobile the shortcut-menu is awesome:)", "nearby-messages": [ { "msgtxt": " like t-mobile the shortcut-menu is awesome:)" } ] }
+{ "message": " like verizon its shortcut-menu is awesome:)", "nearby-messages": [ { "msgtxt": " like verizon its shortcut-menu is awesome:)" } ] }
+{ "message": " love t-mobile its customization is good:)", "nearby-messages": [ { "msgtxt": " love t-mobile its customization is good:)" } ] }
+{ "message": " love verizon its voicemail-service is awesome", "nearby-messages": [ { "msgtxt": " love verizon its voicemail-service is awesome" } ] }
diff --git a/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.11.adm b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.11.adm
new file mode 100644
index 0000000..a5ec171
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.11.adm
@@ -0,0 +1,10 @@
+{ "id": 1, "name": "MargaritaStoddard", "similar-users": [  ] }
+{ "id": 2, "name": "IsbelDull", "similar-users": [  ] }
+{ "id": 3, "name": "EmoryUnk", "similar-users": [  ] }
+{ "id": 4, "name": "NicholasStroh", "similar-users": [  ] }
+{ "id": 5, "name": "VonKemble", "similar-users": [  ] }
+{ "id": 6, "name": "WillisWynne", "similar-users": [  ] }
+{ "id": 7, "name": "SuzannaTillson", "similar-users": [  ] }
+{ "id": 8, "name": "NilaMilliron", "similar-users": [ { "twitter-screenname": "NilaMilliron_tw", "twitter-name": "Nila Milliron" } ] }
+{ "id": 9, "name": "WoodrowNehling", "similar-users": [  ] }
+{ "id": 10, "name": "BramHatch", "similar-users": [  ] }
diff --git a/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.12.adm b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.12.adm
new file mode 100644
index 0000000..975222c
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.12.adm
@@ -0,0 +1,7 @@
+{ "id": 1, "alias": "Margarita", "name": "MargaritaStoddard", "user-since": datetime("2012-08-20T10:10:00.000Z"), "friend-ids": {{ 2, 3, 6, 10 }}, "employment": [ { "organization-name": "Codetechno", "start-date": date("2006-08-06"), "end-date": null } ] }
+{ "id": 2, "alias": "Isbel", "name": "IsbelDull", "user-since": datetime("2011-01-22T10:10:00.000Z"), "friend-ids": {{ 1, 4 }}, "employment": [ { "organization-name": "Hexviafind", "start-date": date("2010-04-27"), "end-date": null } ] }
+{ "id": 4, "alias": "Nicholas", "name": "NicholasStroh", "user-since": datetime("2010-12-27T10:10:00.000Z"), "friend-ids": {{ 2 }}, "employment": [ { "organization-name": "Zamcorporation", "start-date": date("2010-06-08"), "end-date": null } ] }
+{ "id": 5, "alias": "Von", "name": "VonKemble", "user-since": datetime("2010-01-05T10:10:00.000Z"), "friend-ids": {{ 3, 6, 10 }}, "employment": [ { "organization-name": "Kongreen", "start-date": date("2010-11-27"), "end-date": null } ] }
+{ "id": 6, "alias": "Willis", "name": "WillisWynne", "user-since": datetime("2005-01-17T10:10:00.000Z"), "friend-ids": {{ 1, 3, 7 }}, "employment": [ { "organization-name": "jaydax", "start-date": date("2009-05-15"), "end-date": null } ] }
+{ "id": 7, "alias": "Suzanna", "name": "SuzannaTillson", "user-since": datetime("2012-08-07T10:10:00.000Z"), "friend-ids": {{ 6 }}, "employment": [ { "organization-name": "Labzatron", "start-date": date("2011-04-19"), "end-date": null } ] }
+{ "id": 8, "alias": "Nila", "name": "NilaMilliron", "user-since": datetime("2008-01-01T10:10:00.000Z"), "friend-ids": {{ 3 }}, "employment": [ { "organization-name": "Plexlane", "start-date": date("2010-02-28"), "end-date": null } ] }
diff --git a/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.13.adm b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.13.adm
new file mode 100644
index 0000000..2df77f6
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.13.adm
@@ -0,0 +1,3 @@
+{ "id": 3, "alias": "Emory", "name": "EmoryUnk", "user-since": datetime("2012-07-10T10:10:00.000Z"), "friend-ids": {{ 1, 5, 8, 9 }}, "employment": [ { "organization-name": "geomedia", "start-date": date("2010-06-17"), "end-date": date("2010-01-26") } ] }
+{ "id": 9, "alias": "Woodrow", "name": "WoodrowNehling", "user-since": datetime("2005-09-20T10:10:00.000Z"), "friend-ids": {{ 3, 10 }}, "employment": [ { "organization-name": "Zuncan", "start-date": date("2003-04-22"), "end-date": date("2009-12-13") } ] }
+{ "id": 10, "alias": "Bram", "name": "BramHatch", "user-since": datetime("2010-10-16T10:10:00.000Z"), "friend-ids": {{ 1, 5, 9 }}, "employment": [ { "organization-name": "physcane", "start-date": date("2007-06-05"), "end-date": date("2011-11-05") } ] }
diff --git a/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.14.adm b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.14.adm
new file mode 100644
index 0000000..f599e28
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.14.adm
@@ -0,0 +1 @@
+10
diff --git a/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.15.adm b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.15.adm
new file mode 100644
index 0000000..954b583
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.15.adm
@@ -0,0 +1,5 @@
+{ "user": "ChangEwing_573", "count": 1 }
+{ "user": "ColineGeyer@63", "count": 3 }
+{ "user": "NathanGiesen@211", "count": 6 }
+{ "user": "NilaMilliron_tw", "count": 1 }
+{ "user": "OliJackson_512", "count": 1 }
diff --git a/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.16.adm b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.16.adm
new file mode 100644
index 0000000..954b583
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.16.adm
@@ -0,0 +1,5 @@
+{ "user": "ChangEwing_573", "count": 1 }
+{ "user": "ColineGeyer@63", "count": 3 }
+{ "user": "NathanGiesen@211", "count": 6 }
+{ "user": "NilaMilliron_tw", "count": 1 }
+{ "user": "OliJackson_512", "count": 1 }
diff --git a/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.17.adm b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.17.adm
new file mode 100644
index 0000000..1dd9016
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.17.adm
@@ -0,0 +1,3 @@
+{ "user": "NathanGiesen@211", "count": 6 }
+{ "user": "ColineGeyer@63", "count": 3 }
+{ "user": "NilaMilliron_tw", "count": 1 }
diff --git a/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.18.adm b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.18.adm
new file mode 100644
index 0000000..b59a814
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.18.adm
@@ -0,0 +1,12 @@
+{ "tweet": { "tweetid": "1", "user": { "screen-name": "NathanGiesen@211", "lang": "en", "friends_count": 39339, "statuses_count": 473, "name": "Nathan Giesen", "followers_count": 49416 }, "sender-location": point("47.44,80.65"), "send-time": datetime("2008-04-26T10:10:00.000Z"), "referred-topics": {{ "t-mobile", "customization" }}, "message-text": " love t-mobile its customization is good:)" }, "similar-tweets": [ {{ "t-mobile", "shortcut-menu" }} ] }
+{ "tweet": { "tweetid": "10", "user": { "screen-name": "ColineGeyer@63", "lang": "en", "friends_count": 121, "statuses_count": 362, "name": "Coline Geyer", "followers_count": 17159 }, "sender-location": point("29.15,76.53"), "send-time": datetime("2008-01-26T10:10:00.000Z"), "referred-topics": {{ "verizon", "voice-clarity" }}, "message-text": " hate verizon its voice-clarity is OMG:(" }, "similar-tweets": [ {{ "verizon", "shortcut-menu" }}, {{ "iphone", "voice-clarity" }}, {{ "verizon", "voicemail-service" }} ] }
+{ "tweet": { "tweetid": "11", "user": { "screen-name": "NilaMilliron_tw", "lang": "en", "friends_count": 445, "statuses_count": 164, "name": "Nila Milliron", "followers_count": 22649 }, "sender-location": point("37.59,68.42"), "send-time": datetime("2008-03-09T10:10:00.000Z"), "referred-topics": {{ "iphone", "platform" }}, "message-text": " can't stand iphone its platform is terrible" }, "similar-tweets": [ {{ "iphone", "voice-clarity" }}, {{ "samsung", "platform" }} ] }
+{ "tweet": { "tweetid": "12", "user": { "screen-name": "OliJackson_512", "lang": "en", "friends_count": 445, "statuses_count": 164, "name": "Oli Jackson", "followers_count": 22649 }, "sender-location": point("24.82,94.63"), "send-time": datetime("2010-02-13T10:10:00.000Z"), "referred-topics": {{ "samsung", "voice-command" }}, "message-text": " like samsung the voice-command is amazing:)" }, "similar-tweets": [ {{ "sprint", "voice-command" }}, {{ "samsung", "platform" }} ] }
+{ "tweet": { "tweetid": "2", "user": { "screen-name": "ColineGeyer@63", "lang": "en", "friends_count": 121, "statuses_count": 362, "name": "Coline Geyer", "followers_count": 17159 }, "sender-location": point("32.84,67.14"), "send-time": datetime("2010-05-13T10:10:00.000Z"), "referred-topics": {{ "verizon", "shortcut-menu" }}, "message-text": " like verizon its shortcut-menu is awesome:)" }, "similar-tweets": [ {{ "verizon", "voice-clarity" }}, {{ "t-mobile", "shortcut-menu" }}, {{ "verizon", "voicemail-service" }} ] }
+{ "tweet": { "tweetid": "3", "user": { "screen-name": "NathanGiesen@211", "lang": "en", "friends_count": 39339, "statuses_count": 473, "name": "Nathan Giesen", "followers_count": 49416 }, "sender-location": point("29.72,75.8"), "send-time": datetime("2006-11-04T10:10:00.000Z"), "referred-topics": {{ "motorola", "speed" }}, "message-text": " like motorola the speed is good:)" }, "similar-tweets": [ {{ "motorola", "speed" }} ] }
+{ "tweet": { "tweetid": "4", "user": { "screen-name": "NathanGiesen@211", "lang": "en", "friends_count": 39339, "statuses_count": 473, "name": "Nathan Giesen", "followers_count": 49416 }, "sender-location": point("39.28,70.48"), "send-time": datetime("2011-12-26T10:10:00.000Z"), "referred-topics": {{ "sprint", "voice-command" }}, "message-text": " like sprint the voice-command is mind-blowing:)" }, "similar-tweets": [ {{ "samsung", "voice-command" }} ] }
+{ "tweet": { "tweetid": "5", "user": { "screen-name": "NathanGiesen@211", "lang": "en", "friends_count": 39339, "statuses_count": 473, "name": "Nathan Giesen", "followers_count": 49416 }, "sender-location": point("40.09,92.69"), "send-time": datetime("2006-08-04T10:10:00.000Z"), "referred-topics": {{ "motorola", "speed" }}, "message-text": " can't stand motorola its speed is terrible:(" }, "similar-tweets": [ {{ "motorola", "speed" }} ] }
+{ "tweet": { "tweetid": "6", "user": { "screen-name": "ColineGeyer@63", "lang": "en", "friends_count": 121, "statuses_count": 362, "name": "Coline Geyer", "followers_count": 17159 }, "sender-location": point("47.51,83.99"), "send-time": datetime("2010-05-07T10:10:00.000Z"), "referred-topics": {{ "iphone", "voice-clarity" }}, "message-text": " like iphone the voice-clarity is good:)" }, "similar-tweets": [ {{ "verizon", "voice-clarity" }}, {{ "iphone", "platform" }} ] }
+{ "tweet": { "tweetid": "7", "user": { "screen-name": "ChangEwing_573", "lang": "en", "friends_count": 182, "statuses_count": 394, "name": "Chang Ewing", "followers_count": 32136 }, "sender-location": point("36.21,72.6"), "send-time": datetime("2011-08-25T10:10:00.000Z"), "referred-topics": {{ "samsung", "platform" }}, "message-text": " like samsung the platform is good" }, "similar-tweets": [ {{ "iphone", "platform" }}, {{ "samsung", "voice-command" }} ] }
+{ "tweet": { "tweetid": "8", "user": { "screen-name": "NathanGiesen@211", "lang": "en", "friends_count": 39339, "statuses_count": 473, "name": "Nathan Giesen", "followers_count": 49416 }, "sender-location": point("46.05,93.34"), "send-time": datetime("2005-10-14T10:10:00.000Z"), "referred-topics": {{ "t-mobile", "shortcut-menu" }}, "message-text": " like t-mobile the shortcut-menu is awesome:)" }, "similar-tweets": [ {{ "t-mobile", "customization" }}, {{ "verizon", "shortcut-menu" }} ] }
+{ "tweet": { "tweetid": "9", "user": { "screen-name": "NathanGiesen@211", "lang": "en", "friends_count": 39339, "statuses_count": 473, "name": "Nathan Giesen", "followers_count": 49416 }, "sender-location": point("36.86,74.62"), "send-time": datetime("2012-07-21T10:10:00.000Z"), "referred-topics": {{ "verizon", "voicemail-service" }}, "message-text": " love verizon its voicemail-service is awesome" }, "similar-tweets": [ {{ "verizon", "voice-clarity" }}, {{ "verizon", "shortcut-menu" }} ] }
diff --git a/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.20.adm b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.20.adm
new file mode 100644
index 0000000..5c8c013
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.20.adm
@@ -0,0 +1,13 @@
+{ "tweetid": "1", "user": { "screen-name": "NathanGiesen@211", "lang": "en", "friends_count": 39339, "statuses_count": 473, "name": "Nathan Giesen", "followers_count": 49416 }, "sender-location": point("47.44,80.65"), "send-time": datetime("2008-04-26T10:10:00.000Z"), "referred-topics": {{ "t-mobile", "customization" }}, "message-text": " love t-mobile its customization is good:)" }
+{ "tweetid": "10", "user": { "screen-name": "ColineGeyer@63", "lang": "en", "friends_count": 121, "statuses_count": 362, "name": "Coline Geyer", "followers_count": 17159 }, "sender-location": point("29.15,76.53"), "send-time": datetime("2008-01-26T10:10:00.000Z"), "referred-topics": {{ "verizon", "voice-clarity" }}, "message-text": " hate verizon its voice-clarity is OMG:(" }
+{ "tweetid": "11", "user": { "screen-name": "NilaMilliron_tw", "lang": "en", "friends_count": 445, "statuses_count": 164, "name": "Nila Milliron", "followers_count": 22649 }, "sender-location": point("37.59,68.42"), "send-time": datetime("2008-03-09T10:10:00.000Z"), "referred-topics": {{ "iphone", "platform" }}, "message-text": " can't stand iphone its platform is terrible" }
+{ "tweetid": "12", "user": { "screen-name": "OliJackson_512", "lang": "en", "friends_count": 445, "statuses_count": 164, "name": "Oli Jackson", "followers_count": 22649 }, "sender-location": point("24.82,94.63"), "send-time": datetime("2010-02-13T10:10:00.000Z"), "referred-topics": {{ "samsung", "voice-command" }}, "message-text": " like samsung the voice-command is amazing:)" }
+{ "tweetid": "13", "user": { "screen-name": "NathanGiesen@211", "lang": "en", "friends_count": 39345, "statuses_count": 479, "name": "Nathan Giesen", "followers_count": 49420 }, "sender-location": point("47.44,80.65"), "send-time": datetime("2008-04-26T10:10:35.000Z"), "referred-topics": {{ "tweeting" }}, "message-text": "tweety tweet, my fellow tweeters!" }
+{ "tweetid": "2", "user": { "screen-name": "ColineGeyer@63", "lang": "en", "friends_count": 121, "statuses_count": 362, "name": "Coline Geyer", "followers_count": 17159 }, "sender-location": point("32.84,67.14"), "send-time": datetime("2010-05-13T10:10:00.000Z"), "referred-topics": {{ "verizon", "shortcut-menu" }}, "message-text": " like verizon its shortcut-menu is awesome:)" }
+{ "tweetid": "3", "user": { "screen-name": "NathanGiesen@211", "lang": "en", "friends_count": 39339, "statuses_count": 473, "name": "Nathan Giesen", "followers_count": 49416 }, "sender-location": point("29.72,75.8"), "send-time": datetime("2006-11-04T10:10:00.000Z"), "referred-topics": {{ "motorola", "speed" }}, "message-text": " like motorola the speed is good:)" }
+{ "tweetid": "4", "user": { "screen-name": "NathanGiesen@211", "lang": "en", "friends_count": 39339, "statuses_count": 473, "name": "Nathan Giesen", "followers_count": 49416 }, "sender-location": point("39.28,70.48"), "send-time": datetime("2011-12-26T10:10:00.000Z"), "referred-topics": {{ "sprint", "voice-command" }}, "message-text": " like sprint the voice-command is mind-blowing:)" }
+{ "tweetid": "5", "user": { "screen-name": "NathanGiesen@211", "lang": "en", "friends_count": 39339, "statuses_count": 473, "name": "Nathan Giesen", "followers_count": 49416 }, "sender-location": point("40.09,92.69"), "send-time": datetime("2006-08-04T10:10:00.000Z"), "referred-topics": {{ "motorola", "speed" }}, "message-text": " can't stand motorola its speed is terrible:(" }
+{ "tweetid": "6", "user": { "screen-name": "ColineGeyer@63", "lang": "en", "friends_count": 121, "statuses_count": 362, "name": "Coline Geyer", "followers_count": 17159 }, "sender-location": point("47.51,83.99"), "send-time": datetime("2010-05-07T10:10:00.000Z"), "referred-topics": {{ "iphone", "voice-clarity" }}, "message-text": " like iphone the voice-clarity is good:)" }
+{ "tweetid": "7", "user": { "screen-name": "ChangEwing_573", "lang": "en", "friends_count": 182, "statuses_count": 394, "name": "Chang Ewing", "followers_count": 32136 }, "sender-location": point("36.21,72.6"), "send-time": datetime("2011-08-25T10:10:00.000Z"), "referred-topics": {{ "samsung", "platform" }}, "message-text": " like samsung the platform is good" }
+{ "tweetid": "8", "user": { "screen-name": "NathanGiesen@211", "lang": "en", "friends_count": 39339, "statuses_count": 473, "name": "Nathan Giesen", "followers_count": 49416 }, "sender-location": point("46.05,93.34"), "send-time": datetime("2005-10-14T10:10:00.000Z"), "referred-topics": {{ "t-mobile", "shortcut-menu" }}, "message-text": " like t-mobile the shortcut-menu is awesome:)" }
+{ "tweetid": "9", "user": { "screen-name": "NathanGiesen@211", "lang": "en", "friends_count": 39339, "statuses_count": 473, "name": "Nathan Giesen", "followers_count": 49416 }, "sender-location": point("36.86,74.62"), "send-time": datetime("2012-07-21T10:10:00.000Z"), "referred-topics": {{ "verizon", "voicemail-service" }}, "message-text": " love verizon its voicemail-service is awesome" }
diff --git a/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.22.adm b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.22.adm
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.22.adm
@@ -0,0 +1 @@
+0
diff --git a/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.4.adm b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.4.adm
new file mode 100644
index 0000000..e6d8392
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.4.adm
@@ -0,0 +1 @@
+{ "id": 8, "alias": "Nila", "name": "NilaMilliron", "user-since": datetime("2008-01-01T10:10:00.000Z"), "friend-ids": {{ 3 }}, "employment": [ { "organization-name": "Plexlane", "start-date": date("2010-02-28"), "end-date": null } ] }
diff --git a/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.5.adm b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.5.adm
new file mode 100644
index 0000000..5e2b105
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.5.adm
@@ -0,0 +1,3 @@
+{ "id": 2, "alias": "Isbel", "name": "IsbelDull", "user-since": datetime("2011-01-22T10:10:00.000Z"), "friend-ids": {{ 1, 4 }}, "employment": [ { "organization-name": "Hexviafind", "start-date": date("2010-04-27"), "end-date": null } ] }
+{ "id": 3, "alias": "Emory", "name": "EmoryUnk", "user-since": datetime("2012-07-10T10:10:00.000Z"), "friend-ids": {{ 1, 5, 8, 9 }}, "employment": [ { "organization-name": "geomedia", "start-date": date("2010-06-17"), "end-date": date("2010-01-26") } ] }
+{ "id": 4, "alias": "Nicholas", "name": "NicholasStroh", "user-since": datetime("2010-12-27T10:10:00.000Z"), "friend-ids": {{ 2 }}, "employment": [ { "organization-name": "Zamcorporation", "start-date": date("2010-06-08"), "end-date": null } ] }
diff --git a/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.6.adm b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.6.adm
new file mode 100644
index 0000000..dba1e35
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.6.adm
@@ -0,0 +1,4 @@
+{ "id": 2, "alias": "Isbel", "name": "IsbelDull", "user-since": datetime("2011-01-22T10:10:00.000Z"), "friend-ids": {{ 1, 4 }}, "employment": [ { "organization-name": "Hexviafind", "start-date": date("2010-04-27"), "end-date": null } ] }
+{ "id": 3, "alias": "Emory", "name": "EmoryUnk", "user-since": datetime("2012-07-10T10:10:00.000Z"), "friend-ids": {{ 1, 5, 8, 9 }}, "employment": [ { "organization-name": "geomedia", "start-date": date("2010-06-17"), "end-date": date("2010-01-26") } ] }
+{ "id": 4, "alias": "Nicholas", "name": "NicholasStroh", "user-since": datetime("2010-12-27T10:10:00.000Z"), "friend-ids": {{ 2 }}, "employment": [ { "organization-name": "Zamcorporation", "start-date": date("2010-06-08"), "end-date": null } ] }
+{ "id": 10, "alias": "Bram", "name": "BramHatch", "user-since": datetime("2010-10-16T10:10:00.000Z"), "friend-ids": {{ 1, 5, 9 }}, "employment": [ { "organization-name": "physcane", "start-date": date("2007-06-05"), "end-date": date("2011-11-05") } ] }
diff --git a/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.7.adm b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.7.adm
new file mode 100644
index 0000000..a403f1b
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.7.adm
@@ -0,0 +1,15 @@
+{ "uname": "BramHatch", "message": " can't stand t-mobile its voicemail-service is OMG:(" }
+{ "uname": "BramHatch", "message": " dislike iphone the voice-command is bad:(" }
+{ "uname": "EmoryUnk", "message": " love sprint its shortcut-menu is awesome:)" }
+{ "uname": "EmoryUnk", "message": " love verizon its wireless is good" }
+{ "uname": "IsbelDull", "message": " like samsung the plan is amazing" }
+{ "uname": "IsbelDull", "message": " like t-mobile its platform is mind-blowing" }
+{ "uname": "MargaritaStoddard", "message": " dislike iphone its touch-screen is horrible" }
+{ "uname": "MargaritaStoddard", "message": " can't stand at&t the network is horrible:(" }
+{ "uname": "MargaritaStoddard", "message": " like verizon the 3G is awesome:)" }
+{ "uname": "MargaritaStoddard", "message": " can't stand motorola the touch-screen is terrible" }
+{ "uname": "MargaritaStoddard", "message": " can't stand at&t its plan is terrible" }
+{ "uname": "SuzannaTillson", "message": " like iphone the voicemail-service is awesome" }
+{ "uname": "VonKemble", "message": " dislike sprint the speed is horrible" }
+{ "uname": "WillisWynne", "message": " love sprint the customization is mind-blowing" }
+{ "uname": "WoodrowNehling", "message": " love at&t its 3G is good:)" }
diff --git a/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.8.adm b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.8.adm
new file mode 100644
index 0000000..a403f1b
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.8.adm
@@ -0,0 +1,15 @@
+{ "uname": "BramHatch", "message": " can't stand t-mobile its voicemail-service is OMG:(" }
+{ "uname": "BramHatch", "message": " dislike iphone the voice-command is bad:(" }
+{ "uname": "EmoryUnk", "message": " love sprint its shortcut-menu is awesome:)" }
+{ "uname": "EmoryUnk", "message": " love verizon its wireless is good" }
+{ "uname": "IsbelDull", "message": " like samsung the plan is amazing" }
+{ "uname": "IsbelDull", "message": " like t-mobile its platform is mind-blowing" }
+{ "uname": "MargaritaStoddard", "message": " dislike iphone its touch-screen is horrible" }
+{ "uname": "MargaritaStoddard", "message": " can't stand at&t the network is horrible:(" }
+{ "uname": "MargaritaStoddard", "message": " like verizon the 3G is awesome:)" }
+{ "uname": "MargaritaStoddard", "message": " can't stand motorola the touch-screen is terrible" }
+{ "uname": "MargaritaStoddard", "message": " can't stand at&t its plan is terrible" }
+{ "uname": "SuzannaTillson", "message": " like iphone the voicemail-service is awesome" }
+{ "uname": "VonKemble", "message": " dislike sprint the speed is horrible" }
+{ "uname": "WillisWynne", "message": " love sprint the customization is mind-blowing" }
+{ "uname": "WoodrowNehling", "message": " love at&t its 3G is good:)" }
diff --git a/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.9.adm b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.9.adm
new file mode 100644
index 0000000..09b0f08
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/tinysocial/tinysocial-suite/tinysocial-suite.9.adm
@@ -0,0 +1,10 @@
+{ "uname": "BramHatch", "messages": [ " can't stand t-mobile its voicemail-service is OMG:(", " dislike iphone the voice-command is bad:(" ] }
+{ "uname": "EmoryUnk", "messages": [ " love sprint its shortcut-menu is awesome:)", " love verizon its wireless is good" ] }
+{ "uname": "IsbelDull", "messages": [ " like samsung the plan is amazing", " like t-mobile its platform is mind-blowing" ] }
+{ "uname": "MargaritaStoddard", "messages": [ " dislike iphone its touch-screen is horrible", " can't stand at&t the network is horrible:(", " like verizon the 3G is awesome:)", " can't stand motorola the touch-screen is terrible", " can't stand at&t its plan is terrible" ] }
+{ "uname": "NicholasStroh", "messages": [  ] }
+{ "uname": "NilaMilliron", "messages": [  ] }
+{ "uname": "SuzannaTillson", "messages": [ " like iphone the voicemail-service is awesome" ] }
+{ "uname": "VonKemble", "messages": [ " dislike sprint the speed is horrible" ] }
+{ "uname": "WillisWynne", "messages": [ " love sprint the customization is mind-blowing" ] }
+{ "uname": "WoodrowNehling", "messages": [ " love at&t its 3G is good:)" ] }
diff --git a/asterix-app/src/test/resources/runtimets/results/user-defined-functions/query-issue172/query-issue172.1.adm b/asterix-app/src/test/resources/runtimets/results/user-defined-functions/query-issue172/query-issue172.1.adm
new file mode 100644
index 0000000..aabe6ec
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/user-defined-functions/query-issue172/query-issue172.1.adm
@@ -0,0 +1 @@
+21
diff --git a/asterix-app/src/test/resources/runtimets/testsuite.xml b/asterix-app/src/test/resources/runtimets/testsuite.xml
index 7ff782a..f609bf4 100644
--- a/asterix-app/src/test/resources/runtimets/testsuite.xml
+++ b/asterix-app/src/test/resources/runtimets/testsuite.xml
@@ -3953,6 +3953,11 @@
       </compilation-unit>
     </test-case>
     <test-case FilePath="user-defined-functions">
+      <compilation-unit name="query-issue172">
+        <output-dir compare="Text">query-issue172</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="user-defined-functions">
       <compilation-unit name="query-issue455">
         <output-dir compare="Text">query-issue455</output-dir>
         <expected-error>edu.uci.ics.asterix.common.exceptions.AsterixException</expected-error>
@@ -4304,4 +4309,11 @@
       </compilation-unit>
     </test-case>
   </test-group>
+  <test-group name="tinysocial">
+    <test-case FilePath="tinysocial">
+      <compilation-unit name="tinysocial-suite">
+        <output-dir compare="Text">tinysocial-suite</output-dir>
+      </compilation-unit>
+    </test-case>
+  </test-group>
 </test-suite>
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 7969941..ae5f3ef 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
@@ -155,7 +155,8 @@
         if (expression == null) {
             return;
         }
-
+        String value = metadataProvider.getConfig().get(FunctionUtils.IMPORT_PRIVATE_FUNCTIONS);
+        boolean includePrivateFunctions = (value != null) ? Boolean.valueOf(value.toLowerCase()) : false;
         Set<FunctionSignature> functionCalls = getFunctionCalls(expression);
         for (FunctionSignature signature : functionCalls) {
 
@@ -172,9 +173,7 @@
                     buildOtherUdfs(functionDecl.getFuncBody(), functionDecls, declaredFunctions);
                 }
             } else {
-                String value = metadataProvider.getConfig().get(FunctionUtils.IMPORT_PRIVATE_FUNCTIONS);
-                boolean includePrivateFunctions = (value != null) ? Boolean.valueOf(value.toLowerCase()) : false;
-                if (isBuiltinFunction(signature, includePrivateFunctions)) {
+                if (AsterixBuiltinFunctions.isBuiltinCompilerFunction(signature, includePrivateFunctions)) {
                     continue;
                 } else {
                     throw new AsterixException(" unknown function " + signature);
@@ -195,31 +194,6 @@
 
     }
 
-    private boolean isBuiltinFunction(FunctionSignature signature, boolean includePrivateFunctions) {
-        signature.setNamespace(AsterixBuiltinFunctions.FunctionNamespace.ASTERIX_PUBLIC.name());
-        if (AsterixBuiltinFunctions.isBuiltinCompilerFunction(new FunctionIdentifier(signature.getNamespace(),
-                signature.getName(), signature.getArity()))) {
-            return true;
-        }
-
-        if (includePrivateFunctions) {
-            signature.setNamespace(AlgebricksBuiltinFunctions.ALGEBRICKS_NS);
-            if (AsterixBuiltinFunctions.isBuiltinCompilerFunction(new FunctionIdentifier(signature.getNamespace(),
-                    signature.getName(), signature.getArity()))) {
-                return true;
-            }
-
-            signature.setNamespace(AsterixBuiltinFunctions.FunctionNamespace.ASTERIX_PRIVATE.name());
-            if (AsterixBuiltinFunctions.isBuiltinCompilerFunction(new FunctionIdentifier(signature.getNamespace(),
-                    signature.getName(), signature.getArity()))) {
-                return true;
-            }
-        }
-
-        return false;
-
-    }
-
     private Set<FunctionSignature> getFunctionCalls(Expression expression) throws AsterixException {
         Map<AsterixFunction, DfsColor> color = new HashMap<AsterixFunction, DfsColor>();
         Map<AsterixFunction, List<AsterixFunction>> arcs = new HashMap<AsterixFunction, List<AsterixFunction>>();
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 563b2cf..7520b1f 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
@@ -30,7 +30,7 @@
     }
 
     public String toString() {
-        return rep;
+        return namespace + "." + name + "@" + arity;
     }
 
     @Override
diff --git a/asterix-doc/src/site/markdown/AsterixSimilarityQueries.md b/asterix-doc/src/site/markdown/AsterixSimilarityQueries.md
deleted file mode 100644
index 4f22fef..0000000
--- a/asterix-doc/src/site/markdown/AsterixSimilarityQueries.md
+++ /dev/null
@@ -1,83 +0,0 @@
-# AsterixDB Support of Similarity Queries #
-
-## Motivation ##
-
-Similarity queries are widely used in applications where users need to find records that satisfy a similarity predicate, while exact matching is not sufficient. These queries are especially important for social and Web applications, where errors, abbreviations, and inconsistencies are common.  As an example, we may want to find all the movies starring Schwarzenegger, while we don't know the exact spelling of his last name (despite his popularity in both the movie industry and politics :-)). As another example, we want to find all the Facebook users who have similar friends. To meet this type of needs, AsterixDB supports similarity queries using efficient indexes and algorithms.
-
-## Data Types and Similarity Functions ##
-
-AsterixDB supports various similarity functions, including [edit distance](http://en.wikipedia.org/wiki/Levenshtein_distance) (on strings) and [Jaccard](http://en.wikipedia.org/wiki/Jaccard_index) (on sets). For instance, in our [TinySocial](AdmAql101.html#ADM:_Modeling_Semistructed_Data_in_AsterixDB) example, the `friend-ids` of a Facebook user forms a set of friends, and we can define a similarity between two sets. We can also convert a string to a set of "q-grams" and define the Jaccard similarity between the two sets of two strings. The "q-grams" of a string are its substrings of length "q". For instance, the 3-grams of the string `schwarzenegger` are `sch`, `chw`, `hwa`, ..., `ger`.
-
-AsterixDB provides [tokenization functions](AsterixDataTypesAndFunctions.html#Tokenizing_Functions) to convert strings to sets, and the [similarity functions](AsterixDataTypesAndFunctions.html#Similarity_Functions).
-
-## Selection Queries ##
-
-The following [query](AsterixDataTypesAndFunctions.html#edit-distance) asks for all the Facebook users whose name is similar to `Suzanna Tilson`, i.e., their edit distance is at most 2.
-
-
-        use dataverse TinySocial;
-        
-        for $user in dataset('FacebookUsers')
-        let $ed := edit-distance($user.name, "Suzanna Tilson")
-        where $ed <= 2
-        return $user
-
-
-The following [query](AsterixDataTypesAndFunctions.html#similarity-jaccard) asks for all the Facebook users whose set of friend ids is similar to `[1,5,9]`, i.e., their Jaccard similarity is at least 0.6.
-
-
-        use dataverse TinySocial;
-        
-        for $user in dataset('FacebookUsers')
-        let $sim := similarity-jaccard($user.friend-ids, [1,5,9])
-        where $sim >= 0.6f
-        return $user
-
-
-AsterixDB allows a user to use a similarity operator `~=` to express a similarity condition by defining the similiarty function and threshold using "set" statements earlier. For instance, the above query can be equivalently written as:
-
-
-        use dataverse TinySocial;
-        
-        set simfunction "jaccard";
-        set simthreshold "0.6f";
-        
-        for $user in dataset('FacebookUsers')
-        where $user.friend-ids ~= [1,5,9]
-        return $user
-
-
-
-## Fuzzy Join Queries ##
-
-AsterixDB supports fuzzy joins between two data sets. The following [query](AdmAql101.html#Query_5_-_Fuzzy_Join) finds, for each Facebook user, all Twitter users with names "similar" to their name based on the edit distance.
-
-
-        use dataverse TinySocial;
-        
-        set simfunction "edit-distance";
-        set simthreshold "3";
-        
-        for $fbu in dataset FacebookUsers
-        return {
-            "id": $fbu.id,
-            "name": $fbu.name,
-            "similar-users": for $t in dataset TweetMessages
-                                let $tu := $t.user
-                                where $tu.name ~= $fbu.name
-                                return {
-                                "twitter-screenname": $tu.screen-name,
-                                "twitter-name": $tu.name
-                                }
-        };
-
-
-## Using Indexes ##
-
-AsterixDB uses inverted index to support similarity queries efficiently. For instance, the following query creates such an index on the `FacebookUser.name` attribute using an inverted index of 3-grams.  After the index is created, similarity queries with an edit distance condition on this attribute can be answered more efficiently.
-
-
-        use dataverse TinySocial;
-        
-        create index fbUserFuzzyIdx on FacebookUsers(name) type ngram(3);
-
diff --git a/asterix-doc/src/site/markdown/SimilarityQuery.md b/asterix-doc/src/site/markdown/SimilarityQuery.md
new file mode 100644
index 0000000..6f332ea
--- /dev/null
+++ b/asterix-doc/src/site/markdown/SimilarityQuery.md
@@ -0,0 +1,174 @@
+
+# AsterixDB  Support of Similarity Queries # 
+
+## Motivation ## 
+
+Similarity queries are widely used in applications where users need to
+find records that satisfy a similarity predicate, while exact matching
+is not sufficient. These queries are especially important for social
+and Web applications, where errors, abbreviations, and inconsistencies
+are common.  As an example, we may want to find all the movies
+starring Schwarzenegger, while we don't know the exact spelling of his
+last name (despite his popularity in both the movie industry and
+politics :-)). As another example, we want to find all the Facebook
+users who have similar friends. To meet this type of needs, AsterixDB
+supports similarity queries using efficient indexes and algorithms.
+
+## Data Types and Similarity Functions ## 
+
+AsterixDB supports [edit distance](http://en.wikipedia.org/wiki/Levenshtein_distance) (on strings) and
+[Jaccard](http://en.wikipedia.org/wiki/Jaccard_index) (on sets).  For
+instance, in our
+[TinySocial](AdmAql101.html#ADM:_Modeling_Semistructed_Data_in_AsterixDB)
+example, the `friend-ids` of a Facebook user forms a set
+of friends, and we can define a similarity between the sets of
+friends of two users. We can also convert a string to a set of grams of a length "n"
+(called "n-grams") and define the Jaccard similarity between the two
+gram sets of the two strings. Formally, the "n-grams" of a string are
+its substrings of length "n". For instance, the 3-grams of the string
+`schwarzenegger` are `sch`, `chw`, `hwa`, ..., `ger`.
+
+AsterixDB provides
+[tokenization functions](AsterixDBFunctions.html#Tokenizing_Functions)
+to convert strings to sets, and the
+[similarity functions](AsterixDBFunctions.html#Similarity_Functions).
+
+## Similarity Selection Queries ## 
+
+The following [query](AsterixDBFunctions.html#edit-distance)
+asks for all the Facebook users whose name is similar to
+`Suzanna Tilson`, i.e., their edit distance is at most 2.
+
+        use dataverse TinySocial;
+        
+        for $user in dataset('FacebookUsers')
+        let $ed := edit-distance($user.name, "Suzanna Tilson")
+        where $ed <= 2
+        return $user
+
+
+The following [query](AsterixDBFunctions.html#similarity-jaccard)
+asks for all the Facebook users whose set of friend ids is
+similar to `[1,5,9]`, i.e., their Jaccard similarity is at least 0.6.
+
+        use dataverse TinySocial;
+        
+        for $user in dataset('FacebookUsers')
+        let $sim := similarity-jaccard($user.friend-ids, [1,5,9])
+        where $sim >= 0.6f
+        return $user
+
+
+AsterixDB allows a user to use a similarity operator `~=` to express a
+condition by defining the similarity function and threshold
+using "set" statements earlier. For instance, the above query can be
+equivalently written as:
+
+        use dataverse TinySocial;
+        
+        set simfunction "jaccard";
+        set simthreshold "0.6f";
+        
+        for $user in dataset('FacebookUsers')
+        where $user.friend-ids ~= [1,5,9]
+        return $user
+
+
+In this query, we first declare Jaccard as the similarity function
+using `simfunction` and then specify the threshold `0.6f` using
+`simthreshold`.
+
+## Similarity Join Queries ## 
+
+AsterixDB supports fuzzy joins between two sets. The following
+[query](AdmAql101.html#Query_5_-_Fuzzy_Join)
+finds, for each Facebook user, all Twitter users with names
+similar to their name based on the edit distance.
+
+        use dataverse TinySocial;
+        
+        set simfunction "edit-distance";
+        set simthreshold "3";
+	
+        for $fbu in dataset FacebookUsers
+        return {
+            "id": $fbu.id,
+            "name": $fbu.name,
+            "similar-users": for $t in dataset TweetMessages
+                                let $tu := $t.user
+                                where $tu.name ~= $fbu.name
+                                return {
+                                "twitter-screenname": $tu.screen-name,
+                                "twitter-name": $tu.name
+                                }
+        };
+
+## Using Indexes to Support Similarity Queries ## 
+
+AsterixDB uses two types of indexes to support similarity queries, namely
+"ngram index" and "keyword index".
+
+### NGram Index ###
+
+An "ngram index" is constructed on a set of strings.  We generate n-grams for each string, and build an inverted
+list for each n-gram that includes the ids of the strings with this
+gram.  A similarity query can be answered efficiently by accessing the
+inverted lists of the grams in the query and counting the number of
+occurrences of the string ids on these inverted lists.  The similar
+idea can be used to answer queries with Jaccard similarity.  A
+detailed description of these techniques is available at this
+[paper](http://www.ics.uci.edu/~chenli/pub/icde2009-memreducer.pdf).
+
+For instance, the following DDL statements create an ngram index on the
+`FacebookUsers.name` attribute using an inverted index of 3-grams.
+
+        use dataverse TinySocial;
+        
+        create index fbUserIdx on FacebookUsers(name) type ngram(3);
+
+The number "3" in "ngram(3)" is the length "n" in the grams. This
+index can be used to optimize similarity queries on this attribute
+using 
+[edit-distance](AsterixDBFunctions.html#edit-distance), 
+[edit-distance-check](AsterixDBFunctions.html#edit-distance-check), 
+[jaccard](AsterixDBFunctions.html#similarity-jaccard),
+or [jaccard-check](AsterixDBFunctions.html#similarity-jaccard-check) 
+queries on this attribute where the
+similarity is defined on sets of 3-grams.  This index can also be used
+to optimize queries with the "[contains()]((AsterixDBFunctions.html#contains))" predicate (i.e., substring
+matching) since it can be also be solved by counting on the inverted
+lists of the grams in the query string.
+
+### Keyword Index ###
+
+A "keyword index" is constructed on a set of strings or sets (e.g., OrderedList, UnorderedList). Instead of 
+generating grams as in an ngram index, we generate tokens (e.g., words) and for each token, construct an inverted list that includes the ids of the
+records with this token.  The following two examples show how to create keyword index on two different types:
+
+
+#### Keyword Index on String Type ####
+
+        use dataverse TinySocial;
+
+        create index fbMessageIdx on FacebookMessages(message) type keyword;
+
+        for $o in dataset('FacebookMessages')
+        let $jacc := similarity-jaccard-check(word-tokens($o.message), word-tokens("love like verizon"), 0.2f)
+        where $jacc[0]
+        return $o
+        
+#### Keyword Index on UnorderedList Type ####
+        
+        use dataverse TinySocial;
+
+        create index fbUserIdx_fids on FacebookUsers(friend-ids) type keyword;
+
+        for $c in dataset('FacebookUsers')
+        let $jacc := similarity-jaccard-check($c.friend-ids, {{3,10}}, 0.5f)
+        where $jacc[0]
+        return $c
+        
+As shown above, keyword index can be used to optimize queries with token-based similarity predicates, including
+[similarity-jaccard](AsterixDBFunctions.html#similarity-jaccard) and
+[similarity-jaccard-check](AsterixDBFunctions.html#similarity-jaccard-check).
+
diff --git a/asterix-events/pom.xml b/asterix-events/pom.xml
index 94042e1..108bde2 100644
--- a/asterix-events/pom.xml
+++ b/asterix-events/pom.xml
@@ -173,5 +173,10 @@
      <type>jar</type>
      <scope>compile</scope>
     </dependency>
+   <dependency>
+   	<groupId>log4j</groupId>
+   	<artifactId>log4j</artifactId>
+   	<version>1.2.9</version>
+   </dependency>
   </dependencies>
 </project>
diff --git a/asterix-external-data/pom.xml b/asterix-external-data/pom.xml
index d534716..842cd67 100644
--- a/asterix-external-data/pom.xml
+++ b/asterix-external-data/pom.xml
@@ -117,6 +117,12 @@
 			<version>1.0.0</version>
 			<type>jar</type>
 			<scope>compile</scope>
+			<exclusions>
+				<exclusion>
+					<artifactId>rome</artifactId>
+					<groupId>net.java.dev.rome</groupId>
+				</exclusion>
+			</exclusions>
 		</dependency>
 		<dependency>
 			<groupId>rome</groupId>
diff --git a/asterix-installer/src/main/resources/conf/asterix-configuration.xml b/asterix-installer/src/main/resources/conf/asterix-configuration.xml
index b6958c5..bfec2db 100644
--- a/asterix-installer/src/main/resources/conf/asterix-configuration.xml
+++ b/asterix-installer/src/main/resources/conf/asterix-configuration.xml
@@ -55,7 +55,7 @@
 
 	<property>
 		<name>storage.memorycomponent.globalbudget</name>
-		<value>1073741824</value>
+		<value>263435456</value>
 		<description>The total size of memory in bytes that the sum of all
 			open memory
 			components cannot exceed. (Default = "1073741824" // 1GB)
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/functions/MetadataBuiltinFunctions.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/functions/MetadataBuiltinFunctions.java
index 60f2e6d..406b835 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/functions/MetadataBuiltinFunctions.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/functions/MetadataBuiltinFunctions.java
@@ -30,7 +30,7 @@
 
     public static void addMetadataBuiltinFunctions() {
 
-        AsterixBuiltinFunctions.add(AsterixBuiltinFunctions.DATASET, new IResultTypeComputer() {
+        AsterixBuiltinFunctions.addFunction(AsterixBuiltinFunctions.DATASET, new IResultTypeComputer() {
 
             @Override
             public IAType computeType(ILogicalExpression expression, IVariableTypeEnvironment env,
@@ -73,7 +73,7 @@
             }
         });
 
-        AsterixBuiltinFunctions.add(AsterixBuiltinFunctions.FEED_INGEST, new IResultTypeComputer() {
+        AsterixBuiltinFunctions.addPrivateFunction(AsterixBuiltinFunctions.FEED_INGEST, new IResultTypeComputer() {
 
             @Override
             public IAType computeType(ILogicalExpression expression, IVariableTypeEnvironment env,
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/AsterixBuiltinFunctions.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/AsterixBuiltinFunctions.java
index eb882b8..2a732ac 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/AsterixBuiltinFunctions.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/AsterixBuiltinFunctions.java
@@ -8,6 +8,8 @@
 
 import org.apache.commons.lang3.mutable.Mutable;
 
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.common.functions.FunctionSignature;
 import edu.uci.ics.asterix.om.typecomputer.base.IResultTypeComputer;
 import edu.uci.ics.asterix.om.typecomputer.impl.ABooleanTypeComputer;
 import edu.uci.ics.asterix.om.typecomputer.impl.ACircleTypeComputer;
@@ -103,18 +105,12 @@
         SI
     }
 
-    /*
-     * A function is categorized as public or private depending upon whether it can be used by the end-user in AQL queries.
-     */
-    public enum FunctionNamespace {
-        ASTERIX_PUBLIC,
-        ASTERIX_PRIVATE
-    }
-
     private static final FunctionInfoRepository registeredFunctions = new FunctionInfoRepository();
 
     // it is supposed to be an identity mapping
-    private final static Map<IFunctionInfo, IFunctionInfo> builtinFunctionsSet = new HashMap<IFunctionInfo, IFunctionInfo>();
+    private final static Map<IFunctionInfo, IFunctionInfo> builtinPublicFunctionsSet = new HashMap<IFunctionInfo, IFunctionInfo>();
+    private final static Map<IFunctionInfo, IFunctionInfo> builtinPrivateFunctionsSet = new HashMap<IFunctionInfo, IFunctionInfo>();
+
     private final static Map<IFunctionInfo, IResultTypeComputer> funTypeComputer = new HashMap<IFunctionInfo, IResultTypeComputer>();
 
     private final static Set<IFunctionInfo> builtinAggregateFunctions = new HashSet<IFunctionInfo>();
@@ -126,449 +122,430 @@
     private final static Map<IFunctionInfo, IFunctionInfo> scalarToAggregateFunctionMap = new HashMap<IFunctionInfo, IFunctionInfo>();
     private static final Map<IFunctionInfo, SpatialFilterKind> spatialFilterFunctions = new HashMap<IFunctionInfo, SpatialFilterKind>();
 
-    public final static FunctionIdentifier TYPE_OF = new FunctionIdentifier(FunctionNamespace.ASTERIX_PRIVATE.name(),
-            "type-of", 1);
-    public final static FunctionIdentifier GET_HANDLE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "get-handle", 2);
-    public final static FunctionIdentifier GET_DATA = new FunctionIdentifier(FunctionNamespace.ASTERIX_PRIVATE.name(),
-            "get-data", 2);
-    public final static FunctionIdentifier EMBED_TYPE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "embed-type", 1);
+    public final static FunctionIdentifier TYPE_OF = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "type-of", 1);
+    public final static FunctionIdentifier GET_HANDLE = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "get-handle", 2);
+    public final static FunctionIdentifier GET_DATA = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "get-data",
+            2);
+    public final static FunctionIdentifier EMBED_TYPE = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "embed-type", 1);
 
-    public final static FunctionIdentifier GET_ITEM = new FunctionIdentifier(FunctionNamespace.ASTERIX_PRIVATE.name(),
-            "get-item", 2);
-    public final static FunctionIdentifier ANY_COLLECTION_MEMBER = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "any-collection-member", 1);
-    public final static FunctionIdentifier LISTIFY = new FunctionIdentifier(FunctionNamespace.ASTERIX_PRIVATE.name(),
-            "listify", 1);
+    public final static FunctionIdentifier GET_ITEM = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "get-item",
+            2);
+    public final static FunctionIdentifier ANY_COLLECTION_MEMBER = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "any-collection-member", 1);
+    public final static FunctionIdentifier LISTIFY = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "listify", 1);
     // public final static FunctionIdentifier BAGIFY = new
     // FunctionIdentifier(ASTERIX_NS, "bagify", 1, true);
-    public final static FunctionIdentifier LEN = new FunctionIdentifier(FunctionNamespace.ASTERIX_PUBLIC.name(), "len",
-            1);
+    public final static FunctionIdentifier LEN = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "len", 1);
 
-    public final static FunctionIdentifier CONCAT_NON_NULL = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "concat-non-null", FunctionIdentifier.VARARGS);
-    public final static FunctionIdentifier EMPTY_STREAM = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "empty-stream", 0);
-    public final static FunctionIdentifier NON_EMPTY_STREAM = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "non-empty-stream", 0);
+    public final static FunctionIdentifier CONCAT_NON_NULL = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "concat-non-null", FunctionIdentifier.VARARGS);
+    public final static FunctionIdentifier EMPTY_STREAM = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "empty-stream", 0);
+    public final static FunctionIdentifier NON_EMPTY_STREAM = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "non-empty-stream", 0);
     public final static FunctionIdentifier ORDERED_LIST_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "ordered-list-constructor", FunctionIdentifier.VARARGS);
+            FunctionConstants.ASTERIX_NS, "ordered-list-constructor", FunctionIdentifier.VARARGS);
     public final static FunctionIdentifier UNORDERED_LIST_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "unordered-list-constructor", FunctionIdentifier.VARARGS);
+            FunctionConstants.ASTERIX_NS, "unordered-list-constructor", FunctionIdentifier.VARARGS);
 
     // records
     public final static FunctionIdentifier CLOSED_RECORD_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "closed-record-constructor", FunctionIdentifier.VARARGS);
+            FunctionConstants.ASTERIX_NS, "closed-record-constructor", FunctionIdentifier.VARARGS);
     public final static FunctionIdentifier OPEN_RECORD_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "open-record-constructor", FunctionIdentifier.VARARGS);
+            FunctionConstants.ASTERIX_NS, "open-record-constructor", FunctionIdentifier.VARARGS);
     public final static FunctionIdentifier RECORD_TYPE_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "record-type-constructor", FunctionIdentifier.VARARGS);
-    public final static FunctionIdentifier FIELD_ACCESS_BY_INDEX = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "field-access-by-index", 2);
-    public final static FunctionIdentifier FIELD_ACCESS_BY_NAME = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "field-access-by-name", 2);
+            FunctionConstants.ASTERIX_NS, "record-type-constructor", FunctionIdentifier.VARARGS);
+    public final static FunctionIdentifier FIELD_ACCESS_BY_INDEX = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "field-access-by-index", 2);
+    public final static FunctionIdentifier FIELD_ACCESS_BY_NAME = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "field-access-by-name", 2);
 
-    public final static FunctionIdentifier NUMERIC_UNARY_MINUS = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "numeric-unary-minus", 1);
+    public final static FunctionIdentifier NUMERIC_UNARY_MINUS = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "numeric-unary-minus", 1);
 
-    public final static FunctionIdentifier NUMERIC_SUBTRACT = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "numeric-subtract", 2);
-    public final static FunctionIdentifier NUMERIC_MULTIPLY = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "numeric-multiply", 2);
-    public final static FunctionIdentifier NUMERIC_DIVIDE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "numeric-divide", 2);
-    public final static FunctionIdentifier NUMERIC_MOD = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "numeric-mod", 2);
-    public final static FunctionIdentifier NUMERIC_IDIV = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "numeric-idiv", 2);
-    public final static FunctionIdentifier CARET = new FunctionIdentifier(FunctionNamespace.ASTERIX_PUBLIC.name(),
-            "caret", 2);
+    public final static FunctionIdentifier NUMERIC_SUBTRACT = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "numeric-subtract", 2);
+    public final static FunctionIdentifier NUMERIC_MULTIPLY = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "numeric-multiply", 2);
+    public final static FunctionIdentifier NUMERIC_DIVIDE = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "numeric-divide", 2);
+    public final static FunctionIdentifier NUMERIC_MOD = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "numeric-mod", 2);
+    public final static FunctionIdentifier NUMERIC_IDIV = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "numeric-idiv", 2);
+    public final static FunctionIdentifier CARET = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "caret", 2);
 
-    public final static FunctionIdentifier NUMERIC_ABS = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "numeric-abs", 1);
-    public final static FunctionIdentifier NUMERIC_CEILING = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "numeric-ceiling", 1);
-    public final static FunctionIdentifier NUMERIC_FLOOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "numeric-floor", 1);
-    public final static FunctionIdentifier NUMERIC_ROUND = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "numeric-round", 1);
+    public final static FunctionIdentifier NUMERIC_ABS = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "numeric-abs", 1);
+    public final static FunctionIdentifier NUMERIC_CEILING = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "numeric-ceiling", 1);
+    public final static FunctionIdentifier NUMERIC_FLOOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "numeric-floor", 1);
+    public final static FunctionIdentifier NUMERIC_ROUND = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "numeric-round", 1);
     public final static FunctionIdentifier NUMERIC_ROUND_HALF_TO_EVEN = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "numeric-round-half-to-even", 1);
+            FunctionConstants.ASTERIX_NS, "numeric-round-half-to-even", 1);
     public final static FunctionIdentifier NUMERIC_ROUND_HALF_TO_EVEN2 = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "numeric-round-half-to-even", 2);
+            FunctionConstants.ASTERIX_NS, "numeric-round-half-to-even", 2);
     // String funcitons
-    public final static FunctionIdentifier STRING_EQUAL = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "string-equal", 2);
-    public final static FunctionIdentifier STRING_START_WITH = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "start-with", 2);
-    public final static FunctionIdentifier STRING_END_WITH = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "end-with", 2);
-    public final static FunctionIdentifier STRING_MATCHES = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "matches", 2);
+    public final static FunctionIdentifier STRING_EQUAL = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "string-equal", 2);
+    public final static FunctionIdentifier STRING_START_WITH = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "start-with", 2);
+    public final static FunctionIdentifier STRING_END_WITH = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "end-with", 2);
+    public final static FunctionIdentifier STRING_MATCHES = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "matches", 2);
     public final static FunctionIdentifier STRING_MATCHES_WITH_FLAG = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "matches", 3);
-    public final static FunctionIdentifier STRING_LOWERCASE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "lowercase", 1);
-    public final static FunctionIdentifier STRING_REPLACE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "replace", 3);
+            FunctionConstants.ASTERIX_NS, "matches", 3);
+    public final static FunctionIdentifier STRING_LOWERCASE = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "lowercase", 1);
+    public final static FunctionIdentifier STRING_REPLACE = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "replace", 3);
     public final static FunctionIdentifier STRING_REPLACE_WITH_FLAG = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "replace", 4);
-    public final static FunctionIdentifier STRING_LENGTH = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "string-length", 1);
-    public final static FunctionIdentifier SUBSTRING2 = new FunctionIdentifier(FunctionNamespace.ASTERIX_PUBLIC.name(),
+            FunctionConstants.ASTERIX_NS, "replace", 4);
+    public final static FunctionIdentifier STRING_LENGTH = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "string-length", 1);
+    public final static FunctionIdentifier SUBSTRING2 = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
             "substring", 2);
-    public final static FunctionIdentifier SUBSTRING_BEFORE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "substring-before", 2);
-    public final static FunctionIdentifier SUBSTRING_AFTER = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "substring-after", 2);
-    public final static FunctionIdentifier STRING_TO_CODEPOINT = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "string-to-codepoint", 1);
-    public final static FunctionIdentifier CODEPOINT_TO_STRING = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "codepoint-to-string", 1);
-    public final static FunctionIdentifier STRING_CONCAT = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "string-concat", 1);
-    public final static FunctionIdentifier STRING_JOIN = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "string-join", 2);
+    public final static FunctionIdentifier SUBSTRING_BEFORE = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "substring-before", 2);
+    public final static FunctionIdentifier SUBSTRING_AFTER = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "substring-after", 2);
+    public final static FunctionIdentifier STRING_TO_CODEPOINT = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "string-to-codepoint", 1);
+    public final static FunctionIdentifier CODEPOINT_TO_STRING = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "codepoint-to-string", 1);
+    public final static FunctionIdentifier STRING_CONCAT = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "string-concat", 1);
+    public final static FunctionIdentifier STRING_JOIN = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "string-join", 2);
 
-    public final static FunctionIdentifier DATASET = new FunctionIdentifier(FunctionNamespace.ASTERIX_PUBLIC.name(),
-            "dataset", 1);
-    public final static FunctionIdentifier FEED_INGEST = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "feed-ingest", 1);
+    public final static FunctionIdentifier DATASET = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "dataset", 1);
+    public final static FunctionIdentifier FEED_INGEST = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "feed-ingest", 1);
 
-    public final static FunctionIdentifier INDEX_SEARCH = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "index-search", FunctionIdentifier.VARARGS);
+    public final static FunctionIdentifier INDEX_SEARCH = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "index-search", FunctionIdentifier.VARARGS);
 
     public final static FunctionIdentifier MAKE_FIELD_INDEX_HANDLE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "make-field-index-handle", 2);
+            FunctionConstants.ASTERIX_NS, "make-field-index-handle", 2);
     public final static FunctionIdentifier MAKE_FIELD_NAME_HANDLE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "make-field-name-handle", 1);
+            FunctionConstants.ASTERIX_NS, "make-field-name-handle", 1);
 
-    public final static FunctionIdentifier SUBSTRING = new FunctionIdentifier(FunctionNamespace.ASTERIX_PUBLIC.name(),
+    public final static FunctionIdentifier SUBSTRING = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
             "substring", 3);
-    public final static FunctionIdentifier LIKE = new FunctionIdentifier(FunctionNamespace.ASTERIX_PUBLIC.name(),
-            "like", 2);
-    public final static FunctionIdentifier CONTAINS = new FunctionIdentifier(FunctionNamespace.ASTERIX_PUBLIC.name(),
-            "contains", 2);
-    public final static FunctionIdentifier STARTS_WITH = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "starts-with", 2);
-    public final static FunctionIdentifier ENDS_WITH = new FunctionIdentifier(FunctionNamespace.ASTERIX_PUBLIC.name(),
+    public final static FunctionIdentifier LIKE = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "like", 2);
+    public final static FunctionIdentifier CONTAINS = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "contains",
+            2);
+    public final static FunctionIdentifier STARTS_WITH = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "starts-with", 2);
+    public final static FunctionIdentifier ENDS_WITH = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
             "ends-with", 2);
 
-    public final static FunctionIdentifier AVG = new FunctionIdentifier(FunctionNamespace.ASTERIX_PRIVATE.name(),
-            "agg-avg", 1);
-    public final static FunctionIdentifier COUNT = new FunctionIdentifier(FunctionNamespace.ASTERIX_PRIVATE.name(),
-            "agg-count", 1);
-    public final static FunctionIdentifier SUM = new FunctionIdentifier(FunctionNamespace.ASTERIX_PRIVATE.name(),
-            "agg-sum", 1);
-    public final static FunctionIdentifier LOCAL_SUM = new FunctionIdentifier(FunctionNamespace.ASTERIX_PRIVATE.name(),
+    public final static FunctionIdentifier AVG = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "agg-avg", 1);
+    public final static FunctionIdentifier COUNT = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "agg-count", 1);
+    public final static FunctionIdentifier SUM = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "agg-sum", 1);
+    public final static FunctionIdentifier LOCAL_SUM = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
             "agg-local-sum", 1);
-    public final static FunctionIdentifier MAX = new FunctionIdentifier(FunctionNamespace.ASTERIX_PRIVATE.name(),
-            "agg-max", 1);
-    public final static FunctionIdentifier LOCAL_MAX = new FunctionIdentifier(FunctionNamespace.ASTERIX_PRIVATE.name(),
+    public final static FunctionIdentifier MAX = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "agg-max", 1);
+    public final static FunctionIdentifier LOCAL_MAX = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
             "agg-local-max", 1);
-    public final static FunctionIdentifier MIN = new FunctionIdentifier(FunctionNamespace.ASTERIX_PRIVATE.name(),
-            "agg-min", 1);
-    public final static FunctionIdentifier LOCAL_MIN = new FunctionIdentifier(FunctionNamespace.ASTERIX_PRIVATE.name(),
+    public final static FunctionIdentifier MIN = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "agg-min", 1);
+    public final static FunctionIdentifier LOCAL_MIN = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
             "agg-local-min", 1);
-    public final static FunctionIdentifier GLOBAL_AVG = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "agg-global-avg", 1);
-    public final static FunctionIdentifier LOCAL_AVG = new FunctionIdentifier(FunctionNamespace.ASTERIX_PRIVATE.name(),
+    public final static FunctionIdentifier GLOBAL_AVG = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "agg-global-avg", 1);
+    public final static FunctionIdentifier LOCAL_AVG = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
             "agg-local-avg", 1);
 
-    public final static FunctionIdentifier SCALAR_AVG = new FunctionIdentifier(FunctionNamespace.ASTERIX_PUBLIC.name(),
-            "avg", 1);
-    public final static FunctionIdentifier SCALAR_COUNT = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "count", 1);
-    public final static FunctionIdentifier SCALAR_SUM = new FunctionIdentifier(FunctionNamespace.ASTERIX_PUBLIC.name(),
-            "sum", 1);
-    public final static FunctionIdentifier SCALAR_MAX = new FunctionIdentifier(FunctionNamespace.ASTERIX_PUBLIC.name(),
-            "max", 1);
-    public final static FunctionIdentifier SCALAR_MIN = new FunctionIdentifier(FunctionNamespace.ASTERIX_PUBLIC.name(),
-            "min", 1);
-    public final static FunctionIdentifier SCALAR_GLOBAL_AVG = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "global-avg", 1);
-    public final static FunctionIdentifier SCALAR_LOCAL_AVG = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "local-avg", 1);
+    public final static FunctionIdentifier SCALAR_AVG = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "avg", 1);
+    public final static FunctionIdentifier SCALAR_COUNT = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "count",
+            1);
+    public final static FunctionIdentifier SCALAR_SUM = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "sum", 1);
+    public final static FunctionIdentifier SCALAR_MAX = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "max", 1);
+    public final static FunctionIdentifier SCALAR_MIN = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "min", 1);
+    public final static FunctionIdentifier SCALAR_GLOBAL_AVG = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "global-avg", 1);
+    public final static FunctionIdentifier SCALAR_LOCAL_AVG = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "local-avg", 1);
 
     // serializable aggregate functions
-    public final static FunctionIdentifier SERIAL_AVG = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "avg-serial", 1);
-    public final static FunctionIdentifier SERIAL_COUNT = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "count-serial", 1);
-    public final static FunctionIdentifier SERIAL_SUM = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "sum-serial", 1);
-    public final static FunctionIdentifier SERIAL_LOCAL_SUM = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "local-sum-serial", 1);
-    public final static FunctionIdentifier SERIAL_GLOBAL_AVG = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "global-avg-serial", 1);
-    public final static FunctionIdentifier SERIAL_LOCAL_AVG = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "local-avg-serial", 1);
+    public final static FunctionIdentifier SERIAL_AVG = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "avg-serial", 1);
+    public final static FunctionIdentifier SERIAL_COUNT = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "count-serial", 1);
+    public final static FunctionIdentifier SERIAL_SUM = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "sum-serial", 1);
+    public final static FunctionIdentifier SERIAL_LOCAL_SUM = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "local-sum-serial", 1);
+    public final static FunctionIdentifier SERIAL_GLOBAL_AVG = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "global-avg-serial", 1);
+    public final static FunctionIdentifier SERIAL_LOCAL_AVG = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "local-avg-serial", 1);
 
-    public final static FunctionIdentifier SCAN_COLLECTION = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "scan-collection", 1);
-    public final static FunctionIdentifier SUBSET_COLLECTION = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "subset-collection", 3);
+    public final static FunctionIdentifier SCAN_COLLECTION = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "scan-collection", 1);
+    public final static FunctionIdentifier SUBSET_COLLECTION = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "subset-collection", 3);
 
-    public final static FunctionIdentifier RANGE = new FunctionIdentifier(FunctionNamespace.ASTERIX_PUBLIC.name(),
-            "range", 2);
+    public final static FunctionIdentifier RANGE = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "range", 2);
 
     // fuzzy functions:
-    public final static FunctionIdentifier FUZZY_EQ = new FunctionIdentifier(FunctionNamespace.ASTERIX_PRIVATE.name(),
-            "fuzzy-eq", 2);
+    public final static FunctionIdentifier FUZZY_EQ = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "fuzzy-eq",
+            2);
 
-    public final static FunctionIdentifier PREFIX_LEN_JACCARD = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "prefix-len-jaccard", 2);
+    public final static FunctionIdentifier PREFIX_LEN_JACCARD = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "prefix-len-jaccard", 2);
 
-    public final static FunctionIdentifier SIMILARITY_JACCARD = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "similarity-jaccard", 2);
+    public final static FunctionIdentifier SIMILARITY_JACCARD = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "similarity-jaccard", 2);
     public final static FunctionIdentifier SIMILARITY_JACCARD_CHECK = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "similarity-jaccard-check", 3);
+            FunctionConstants.ASTERIX_NS, "similarity-jaccard-check", 3);
     public final static FunctionIdentifier SIMILARITY_JACCARD_SORTED = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "similarity-jaccard-sorted", 2);
+            FunctionConstants.ASTERIX_NS, "similarity-jaccard-sorted", 2);
     public final static FunctionIdentifier SIMILARITY_JACCARD_SORTED_CHECK = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "similarity-jaccard-sorted-check", 3);
+            FunctionConstants.ASTERIX_NS, "similarity-jaccard-sorted-check", 3);
     public final static FunctionIdentifier SIMILARITY_JACCARD_PREFIX = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "similarity-jaccard-prefix", 6);
+            FunctionConstants.ASTERIX_NS, "similarity-jaccard-prefix", 6);
     public final static FunctionIdentifier SIMILARITY_JACCARD_PREFIX_CHECK = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "similarity-jaccard-prefix-check", 6);
+            FunctionConstants.ASTERIX_NS, "similarity-jaccard-prefix-check", 6);
 
-    public final static FunctionIdentifier EDIT_DISTANCE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "edit-distance", 2);
-    public final static FunctionIdentifier EDIT_DISTANCE_CHECK = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "edit-distance-check", 3);
+    public final static FunctionIdentifier EDIT_DISTANCE = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "edit-distance", 2);
+    public final static FunctionIdentifier EDIT_DISTANCE_CHECK = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "edit-distance-check", 3);
     public final static FunctionIdentifier EDIT_DISTANCE_LIST_IS_FILTERABLE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "edit-distance-list-is-filterable", 2);
+            FunctionConstants.ASTERIX_NS, "edit-distance-list-is-filterable", 2);
     public final static FunctionIdentifier EDIT_DISTANCE_STRING_IS_FILTERABLE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "edit-distance-string-is-filterable", 4);
+            FunctionConstants.ASTERIX_NS, "edit-distance-string-is-filterable", 4);
 
     // tokenizers:
-    public final static FunctionIdentifier WORD_TOKENS = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "word-tokens", 1);
-    public final static FunctionIdentifier HASHED_WORD_TOKENS = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "hashed-word-tokens", 1);
+    public final static FunctionIdentifier WORD_TOKENS = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "word-tokens", 1);
+    public final static FunctionIdentifier HASHED_WORD_TOKENS = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "hashed-word-tokens", 1);
     public final static FunctionIdentifier COUNTHASHED_WORD_TOKENS = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "counthashed-word-tokens", 1);
-    public final static FunctionIdentifier GRAM_TOKENS = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "gram-tokens", 3);
-    public final static FunctionIdentifier HASHED_GRAM_TOKENS = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "hashed-gram-tokens", 3);
+            FunctionConstants.ASTERIX_NS, "counthashed-word-tokens", 1);
+    public final static FunctionIdentifier GRAM_TOKENS = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "gram-tokens", 3);
+    public final static FunctionIdentifier HASHED_GRAM_TOKENS = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "hashed-gram-tokens", 3);
     public final static FunctionIdentifier COUNTHASHED_GRAM_TOKENS = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "counthashed-gram-tokens", 3);
+            FunctionConstants.ASTERIX_NS, "counthashed-gram-tokens", 3);
 
-    public final static FunctionIdentifier TID = new FunctionIdentifier(FunctionNamespace.ASTERIX_PRIVATE.name(),
-            "tid", 0);
+    public final static FunctionIdentifier TID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "tid", 0);
 
     // constructors:
-    public final static FunctionIdentifier BOOLEAN_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "boolean", 1);
-    public final static FunctionIdentifier NULL_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "null", 1);
-    public final static FunctionIdentifier STRING_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "string", 1);
-    public final static FunctionIdentifier INT8_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "int8", 1);
-    public final static FunctionIdentifier INT16_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "int16", 1);
-    public final static FunctionIdentifier INT32_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "int32", 1);
-    public final static FunctionIdentifier INT64_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "int64", 1);
-    public final static FunctionIdentifier FLOAT_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "float", 1);
-    public final static FunctionIdentifier DOUBLE_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "double", 1);
-    public final static FunctionIdentifier POINT_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "point", 1);
-    public final static FunctionIdentifier POINT3D_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "point3d", 1);
-    public final static FunctionIdentifier LINE_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "line", 1);
-    public final static FunctionIdentifier CIRCLE_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "circle", 1);
-    public final static FunctionIdentifier RECTANGLE_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "rectangle", 1);
-    public final static FunctionIdentifier POLYGON_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "polygon", 1);
-    public final static FunctionIdentifier TIME_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "time", 1);
-    public final static FunctionIdentifier DATE_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "date", 1);
-    public final static FunctionIdentifier DATETIME_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "datetime", 1);
-    public final static FunctionIdentifier DURATION_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "duration", 1);
+    public final static FunctionIdentifier BOOLEAN_CONSTRUCTOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "boolean", 1);
+    public final static FunctionIdentifier NULL_CONSTRUCTOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "null", 1);
+    public final static FunctionIdentifier STRING_CONSTRUCTOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "string", 1);
+    public final static FunctionIdentifier INT8_CONSTRUCTOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "int8", 1);
+    public final static FunctionIdentifier INT16_CONSTRUCTOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "int16", 1);
+    public final static FunctionIdentifier INT32_CONSTRUCTOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "int32", 1);
+    public final static FunctionIdentifier INT64_CONSTRUCTOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "int64", 1);
+    public final static FunctionIdentifier FLOAT_CONSTRUCTOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "float", 1);
+    public final static FunctionIdentifier DOUBLE_CONSTRUCTOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "double", 1);
+    public final static FunctionIdentifier POINT_CONSTRUCTOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "point", 1);
+    public final static FunctionIdentifier POINT3D_CONSTRUCTOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "point3d", 1);
+    public final static FunctionIdentifier LINE_CONSTRUCTOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "line", 1);
+    public final static FunctionIdentifier CIRCLE_CONSTRUCTOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "circle", 1);
+    public final static FunctionIdentifier RECTANGLE_CONSTRUCTOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "rectangle", 1);
+    public final static FunctionIdentifier POLYGON_CONSTRUCTOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "polygon", 1);
+    public final static FunctionIdentifier TIME_CONSTRUCTOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "time", 1);
+    public final static FunctionIdentifier DATE_CONSTRUCTOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "date", 1);
+    public final static FunctionIdentifier DATETIME_CONSTRUCTOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "datetime", 1);
+    public final static FunctionIdentifier DURATION_CONSTRUCTOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "duration", 1);
 
     public final static FunctionIdentifier YEAR_MONTH_DURATION_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "year-month-duration", 1);
+            FunctionConstants.ASTERIX_NS, "year-month-duration", 1);
     public final static FunctionIdentifier DAY_TIME_DURATION_CONSTRUCTOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "day-time-duration", 1);
+            FunctionConstants.ASTERIX_NS, "day-time-duration", 1);
 
     public final static FunctionIdentifier INTERVAL_CONSTRUCTOR_DATE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "interval-from-date", 2);
+            FunctionConstants.ASTERIX_NS, "interval-from-date", 2);
     public final static FunctionIdentifier INTERVAL_CONSTRUCTOR_TIME = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "interval-from-time", 2);
+            FunctionConstants.ASTERIX_NS, "interval-from-time", 2);
     public final static FunctionIdentifier INTERVAL_CONSTRUCTOR_DATETIME = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "interval-from-datetime", 2);
+            FunctionConstants.ASTERIX_NS, "interval-from-datetime", 2);
     public final static FunctionIdentifier INTERVAL_CONSTRUCTOR_START_FROM_DATE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "interval-start-from-date", 2);
+            FunctionConstants.ASTERIX_NS, "interval-start-from-date", 2);
     public final static FunctionIdentifier INTERVAL_CONSTRUCTOR_START_FROM_TIME = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "interval-start-from-time", 2);
+            FunctionConstants.ASTERIX_NS, "interval-start-from-time", 2);
     public final static FunctionIdentifier INTERVAL_CONSTRUCTOR_START_FROM_DATETIME = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "interval-start-from-datetime", 2);
-    public final static FunctionIdentifier INTERVAL_BEFORE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "interval-before", 2);
-    public final static FunctionIdentifier INTERVAL_AFTER = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "interval-after", 2);
-    public final static FunctionIdentifier INTERVAL_MEETS = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "interval-meets", 2);
-    public final static FunctionIdentifier INTERVAL_MET_BY = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "interval-met-by", 2);
-    public final static FunctionIdentifier INTERVAL_OVERLAPS = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "interval-overlaps", 2);
+            FunctionConstants.ASTERIX_NS, "interval-start-from-datetime", 2);
+    public final static FunctionIdentifier INTERVAL_BEFORE = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-before", 2);
+    public final static FunctionIdentifier INTERVAL_AFTER = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-after", 2);
+    public final static FunctionIdentifier INTERVAL_MEETS = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-meets", 2);
+    public final static FunctionIdentifier INTERVAL_MET_BY = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-met-by", 2);
+    public final static FunctionIdentifier INTERVAL_OVERLAPS = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-overlaps", 2);
     public final static FunctionIdentifier INTERVAL_OVERLAPPED_BY = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "interval-overlapped-by", 2);
-    public final static FunctionIdentifier OVERLAP = new FunctionIdentifier(FunctionNamespace.ASTERIX_PUBLIC.name(),
-            "overlap", 2);
-    public final static FunctionIdentifier INTERVAL_STARTS = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "interval-starts", 2);
-    public final static FunctionIdentifier INTERVAL_STARTED_BY = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "interval-started-by", 2);
-    public final static FunctionIdentifier INTERVAL_COVERS = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "interval-covers", 2);
-    public final static FunctionIdentifier INTERVAL_COVERED_BY = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "interval-covered-by", 2);
-    public final static FunctionIdentifier INTERVAL_ENDS = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "interval-ends", 2);
-    public final static FunctionIdentifier INTERVAL_ENDED_BY = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "interval-ended-by", 2);
-    public final static FunctionIdentifier CURRENT_TIME = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "current-time", 0);
-    public final static FunctionIdentifier CURRENT_DATE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "current-date", 0);
-    public final static FunctionIdentifier CURRENT_DATETIME = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "current-datetime", 0);
-    public final static FunctionIdentifier DURATION_EQUAL = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "duration-equal", 2);
+            FunctionConstants.ASTERIX_NS, "interval-overlapped-by", 2);
+    public final static FunctionIdentifier OVERLAP = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "overlap", 2);
+    public final static FunctionIdentifier INTERVAL_STARTS = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-starts", 2);
+    public final static FunctionIdentifier INTERVAL_STARTED_BY = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-started-by", 2);
+    public final static FunctionIdentifier INTERVAL_COVERS = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-covers", 2);
+    public final static FunctionIdentifier INTERVAL_COVERED_BY = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-covered-by", 2);
+    public final static FunctionIdentifier INTERVAL_ENDS = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-ends", 2);
+    public final static FunctionIdentifier INTERVAL_ENDED_BY = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-ended-by", 2);
+    public final static FunctionIdentifier CURRENT_TIME = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "current-time", 0);
+    public final static FunctionIdentifier CURRENT_DATE = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "current-date", 0);
+    public final static FunctionIdentifier CURRENT_DATETIME = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "current-datetime", 0);
+    public final static FunctionIdentifier DURATION_EQUAL = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "duration-equal", 2);
     public final static FunctionIdentifier YEAR_MONTH_DURATION_GREATER_THAN = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "year-month-duration-greater-than", 2);
+            FunctionConstants.ASTERIX_NS, "year-month-duration-greater-than", 2);
     public final static FunctionIdentifier YEAR_MONTH_DURATION_LESS_THAN = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "year-month-duration-less-than", 2);
+            FunctionConstants.ASTERIX_NS, "year-month-duration-less-than", 2);
     public final static FunctionIdentifier DAY_TIME_DURATION_GREATER_THAN = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "day-time-duration-greater-than", 2);
+            FunctionConstants.ASTERIX_NS, "day-time-duration-greater-than", 2);
     public final static FunctionIdentifier DAY_TIME_DURATION_LESS_THAN = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "day-time-duration-less-than", 2);
-    public final static FunctionIdentifier DURATION_FROM_MONTHS = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "duration-from-months", 1);
+            FunctionConstants.ASTERIX_NS, "day-time-duration-less-than", 2);
+    public final static FunctionIdentifier DURATION_FROM_MONTHS = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "duration-from-months", 1);
     public final static FunctionIdentifier MONTHS_FROM_YEAR_MONTH_DURATION = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "months-from-year-month-duration", 1);
+            FunctionConstants.ASTERIX_NS, "months-from-year-month-duration", 1);
     public final static FunctionIdentifier DURATION_FROM_MILLISECONDS = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "duration-from-ms", 1);
+            FunctionConstants.ASTERIX_NS, "duration-from-ms", 1);
     public final static FunctionIdentifier MILLISECONDS_FROM_DAY_TIME_DURATION = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "ms-from-day-time-duration", 1);
+            FunctionConstants.ASTERIX_NS, "ms-from-day-time-duration", 1);
 
     public final static FunctionIdentifier GET_YEAR_MONTH_DURATION = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "get-year-month-duration", 1);
-    public final static FunctionIdentifier GET_DAY_TIME_DURATION = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "get-day-time-duration", 1);
+            FunctionConstants.ASTERIX_NS, "get-year-month-duration", 1);
+    public final static FunctionIdentifier GET_DAY_TIME_DURATION = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "get-day-time-duration", 1);
 
     // spatial
-    public final static FunctionIdentifier CREATE_POINT = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "create-point", 2);
-    public final static FunctionIdentifier CREATE_LINE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "create-line", 2);
-    public final static FunctionIdentifier CREATE_POLYGON = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "create-polygon", FunctionIdentifier.VARARGS);
-    public final static FunctionIdentifier CREATE_CIRCLE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "create-circle", 2);
-    public final static FunctionIdentifier CREATE_RECTANGLE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "create-rectangle", 2);
-    public final static FunctionIdentifier SPATIAL_INTERSECT = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "spatial-intersect", 2);
-    public final static FunctionIdentifier SPATIAL_AREA = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "spatial-area", 1);
-    public final static FunctionIdentifier SPATIAL_DISTANCE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "spatial-distance", 2);
-    public final static FunctionIdentifier CREATE_MBR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "create-mbr", 3);
-    public final static FunctionIdentifier SPATIAL_CELL = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "spatial-cell", 4);
-    public final static FunctionIdentifier SWITCH_CASE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "switch-case", FunctionIdentifier.VARARGS);
-    public final static FunctionIdentifier REG_EXP = new FunctionIdentifier(FunctionNamespace.ASTERIX_PRIVATE.name(),
-            "reg-exp", 2);
+    public final static FunctionIdentifier CREATE_POINT = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "create-point", 2);
+    public final static FunctionIdentifier CREATE_LINE = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "create-line", 2);
+    public final static FunctionIdentifier CREATE_POLYGON = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "create-polygon", FunctionIdentifier.VARARGS);
+    public final static FunctionIdentifier CREATE_CIRCLE = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "create-circle", 2);
+    public final static FunctionIdentifier CREATE_RECTANGLE = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "create-rectangle", 2);
+    public final static FunctionIdentifier SPATIAL_INTERSECT = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "spatial-intersect", 2);
+    public final static FunctionIdentifier SPATIAL_AREA = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "spatial-area", 1);
+    public final static FunctionIdentifier SPATIAL_DISTANCE = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "spatial-distance", 2);
+    public final static FunctionIdentifier CREATE_MBR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "create-mbr", 3);
+    public final static FunctionIdentifier SPATIAL_CELL = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "spatial-cell", 4);
+    public final static FunctionIdentifier SWITCH_CASE = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "switch-case", FunctionIdentifier.VARARGS);
+    public final static FunctionIdentifier REG_EXP = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "reg-exp", 2);
 
-    public final static FunctionIdentifier INJECT_FAILURE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "inject-failure", 2);
-    public final static FunctionIdentifier CAST_RECORD = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PRIVATE.name(), "cast-record", 1);
-    public final static FunctionIdentifier CAST_LIST = new FunctionIdentifier(FunctionNamespace.ASTERIX_PUBLIC.name(),
+    public final static FunctionIdentifier INJECT_FAILURE = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "inject-failure", 2);
+    public final static FunctionIdentifier CAST_RECORD = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "cast-record", 1);
+    public final static FunctionIdentifier CAST_LIST = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
             "cast-list", 1);
 
     // Spatial and temporal type accessors
     public static final FunctionIdentifier ACCESSOR_TEMPORAL_YEAR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "year", 1);
+            FunctionConstants.ASTERIX_NS, "year", 1);
     public static final FunctionIdentifier ACCESSOR_TEMPORAL_MONTH = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "month", 1);
-    public static final FunctionIdentifier ACCESSOR_TEMPORAL_DAY = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "day", 1);
+            FunctionConstants.ASTERIX_NS, "month", 1);
+    public static final FunctionIdentifier ACCESSOR_TEMPORAL_DAY = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "day", 1);
     public static final FunctionIdentifier ACCESSOR_TEMPORAL_HOUR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "hour", 1);
-    public static final FunctionIdentifier ACCESSOR_TEMPORAL_MIN = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "minute", 1);
-    public static final FunctionIdentifier ACCESSOR_TEMPORAL_SEC = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "second", 1);
+            FunctionConstants.ASTERIX_NS, "hour", 1);
+    public static final FunctionIdentifier ACCESSOR_TEMPORAL_MIN = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "minute", 1);
+    public static final FunctionIdentifier ACCESSOR_TEMPORAL_SEC = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "second", 1);
     public static final FunctionIdentifier ACCESSOR_TEMPORAL_MILLISEC = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "millisecond", 1);
+            FunctionConstants.ASTERIX_NS, "millisecond", 1);
     public static final FunctionIdentifier ACCESSOR_TEMPORAL_INTERVAL_START = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "get-interval-start", 1);
+            FunctionConstants.ASTERIX_NS, "get-interval-start", 1);
     public static final FunctionIdentifier ACCESSOR_TEMPORAL_INTERVAL_END = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "get-interval-end", 1);
+            FunctionConstants.ASTERIX_NS, "get-interval-end", 1);
 
     // Temporal functions
     public static final FunctionIdentifier DATE_FROM_UNIX_TIME_IN_DAYS = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "date-from-unix-time-in-days", 1);
-    public static final FunctionIdentifier DATE_FROM_DATETIME = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "date-from-datetime", 1);
-    public final static FunctionIdentifier ADD_DATE_DURATION = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "add-date-duration", 2);
-    public final static FunctionIdentifier SUBTRACT_DATE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "subtract-date", 2);
+            FunctionConstants.ASTERIX_NS, "date-from-unix-time-in-days", 1);
+    public static final FunctionIdentifier DATE_FROM_DATETIME = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "date-from-datetime", 1);
+    public final static FunctionIdentifier ADD_DATE_DURATION = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "add-date-duration", 2);
+    public final static FunctionIdentifier SUBTRACT_DATE = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "subtract-date", 2);
     public final static FunctionIdentifier TIME_FROM_UNIX_TIME_IN_MS = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "time-from-unix-time-in-ms", 1);
-    public final static FunctionIdentifier TIME_FROM_DATETIME = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "time-from-datetime", 1);
-    public final static FunctionIdentifier SUBTRACT_TIME = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "subtract-time", 2);
-    public final static FunctionIdentifier ADD_TIME_DURATION = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "add-time-duration", 2);
+            FunctionConstants.ASTERIX_NS, "time-from-unix-time-in-ms", 1);
+    public final static FunctionIdentifier TIME_FROM_DATETIME = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "time-from-datetime", 1);
+    public final static FunctionIdentifier SUBTRACT_TIME = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "subtract-time", 2);
+    public final static FunctionIdentifier ADD_TIME_DURATION = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "add-time-duration", 2);
     public final static FunctionIdentifier DATETIME_FROM_UNIX_TIME_IN_MS = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "datetime-from-unix-time-in-ms", 1);
+            FunctionConstants.ASTERIX_NS, "datetime-from-unix-time-in-ms", 1);
     public final static FunctionIdentifier DATETIME_FROM_DATE_TIME = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "datetime-from-date-time", 2);
-    public final static FunctionIdentifier SUBTRACT_DATETIME = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "subtract-datetime", 2);
-    public final static FunctionIdentifier ADD_DATETIME_DURATION = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "add-datetime-duration", 2);
+            FunctionConstants.ASTERIX_NS, "datetime-from-date-time", 2);
+    public final static FunctionIdentifier SUBTRACT_DATETIME = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "subtract-datetime", 2);
+    public final static FunctionIdentifier ADD_DATETIME_DURATION = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "add-datetime-duration", 2);
     public final static FunctionIdentifier CALENDAR_DURATION_FROM_DATETIME = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "calendar-duration-from-datetime", 2);
+            FunctionConstants.ASTERIX_NS, "calendar-duration-from-datetime", 2);
     public final static FunctionIdentifier CALENDAR_DURATION_FROM_DATE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "calendar-duration-from-date", 2);
+            FunctionConstants.ASTERIX_NS, "calendar-duration-from-date", 2);
     public final static FunctionIdentifier ADJUST_TIME_FOR_TIMEZONE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "adjust-time-for-timezone", 2);
+            FunctionConstants.ASTERIX_NS, "adjust-time-for-timezone", 2);
     public final static FunctionIdentifier ADJUST_DATETIME_FOR_TIMEZONE = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "adjust-datetime-for-timezone", 2);
+            FunctionConstants.ASTERIX_NS, "adjust-datetime-for-timezone", 2);
 
     public final static FunctionIdentifier GET_POINT_X_COORDINATE_ACCESSOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "get-x", 1);
+            FunctionConstants.ASTERIX_NS, "get-x", 1);
     public final static FunctionIdentifier GET_POINT_Y_COORDINATE_ACCESSOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "get-y", 1);
+            FunctionConstants.ASTERIX_NS, "get-y", 1);
     public final static FunctionIdentifier GET_CIRCLE_RADIUS_ACCESSOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "get-radius", 1);
+            FunctionConstants.ASTERIX_NS, "get-radius", 1);
     public final static FunctionIdentifier GET_CIRCLE_CENTER_ACCESSOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "get-center", 1);
+            FunctionConstants.ASTERIX_NS, "get-center", 1);
     public final static FunctionIdentifier GET_POINTS_LINE_RECTANGLE_POLYGON_ACCESSOR = new FunctionIdentifier(
-            FunctionNamespace.ASTERIX_PUBLIC.name(), "get-points", 1);
+            FunctionConstants.ASTERIX_NS, "get-points", 1);
 
     public static final FunctionIdentifier EQ = AlgebricksBuiltinFunctions.EQ;
     public static final FunctionIdentifier LE = AlgebricksBuiltinFunctions.LE;
@@ -582,8 +559,8 @@
     public static final FunctionIdentifier NUMERIC_ADD = AlgebricksBuiltinFunctions.NUMERIC_ADD;
     public static final FunctionIdentifier IS_NULL = AlgebricksBuiltinFunctions.IS_NULL;
 
-    public static final FunctionIdentifier NOT_NULL = new FunctionIdentifier(FunctionNamespace.ASTERIX_PRIVATE.name(),
-            "not-null", 1);
+    public static final FunctionIdentifier NOT_NULL = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "not-null",
+            1);
 
     public static IFunctionInfo getAsterixFunctionInfo(FunctionIdentifier fid) {
         IFunctionInfo finfo = registeredFunctions.get(fid);
@@ -600,72 +577,73 @@
     static {
 
         // first, take care of Algebricks builtin functions
-        add(EQ, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
-        add(LE, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
-        add(GE, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
-        add(LT, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
-        add(GT, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
-        add(IS_NULL, ABooleanTypeComputer.INSTANCE);
-        add(AND, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
-        add(NEQ, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
-        add(NOT, UnaryBooleanOrNullFunctionTypeComputer.INSTANCE);
-        add(OR, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
-        add(NUMERIC_ADD, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE);
+        addFunction(IS_NULL, ABooleanTypeComputer.INSTANCE);
+        addFunction(NOT, UnaryBooleanOrNullFunctionTypeComputer.INSTANCE);
+
+        addPrivateFunction(EQ, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
+        addPrivateFunction(LE, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
+        addPrivateFunction(GE, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
+        addPrivateFunction(LT, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
+        addPrivateFunction(GT, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
+        addPrivateFunction(AND, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
+        addPrivateFunction(NEQ, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
+        addPrivateFunction(OR, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
+        addPrivateFunction(NUMERIC_ADD, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE);
 
         // and then, Asterix builtin functions
-        add(NOT_NULL, NotNullTypeComputer.INSTANCE);
-        add(ANY_COLLECTION_MEMBER, NonTaggedCollectionMemberResultType.INSTANCE);
-        add(AVG, OptionalADoubleTypeComputer.INSTANCE);
-        add(BOOLEAN_CONSTRUCTOR, UnaryBooleanOrNullFunctionTypeComputer.INSTANCE);
-        add(CARET, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE);
-        add(CIRCLE_CONSTRUCTOR, OptionalACircleTypeComputer.INSTANCE);
-        add(CLOSED_RECORD_CONSTRUCTOR, ClosedRecordConstructorResultType.INSTANCE);
-        add(CONCAT_NON_NULL, ConcatNonNullTypeComputer.INSTANCE);
+        addPrivateFunction(NOT_NULL, NotNullTypeComputer.INSTANCE);
+        addPrivateFunction(ANY_COLLECTION_MEMBER, NonTaggedCollectionMemberResultType.INSTANCE);
+        addPrivateFunction(AVG, OptionalADoubleTypeComputer.INSTANCE);
+        addFunction(BOOLEAN_CONSTRUCTOR, UnaryBooleanOrNullFunctionTypeComputer.INSTANCE);
+        addFunction(CARET, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE);
+        addFunction(CIRCLE_CONSTRUCTOR, OptionalACircleTypeComputer.INSTANCE);
+        addPrivateFunction(CLOSED_RECORD_CONSTRUCTOR, ClosedRecordConstructorResultType.INSTANCE);
+        addPrivateFunction(CONCAT_NON_NULL, ConcatNonNullTypeComputer.INSTANCE);
 
-        add(CONTAINS, ABooleanTypeComputer.INSTANCE);
-        add(COUNT, AInt32TypeComputer.INSTANCE);
-        add(COUNTHASHED_GRAM_TOKENS, OrderedListOfAInt32TypeComputer.INSTANCE);
-        add(COUNTHASHED_WORD_TOKENS, OrderedListOfAInt32TypeComputer.INSTANCE);
-        add(CREATE_CIRCLE, ACircleTypeComputer.INSTANCE);
-        add(CREATE_LINE, ALineTypeComputer.INSTANCE);
-        add(CREATE_MBR, ADoubleTypeComputer.INSTANCE);
-        add(CREATE_POINT, APointTypeComputer.INSTANCE);
-        add(CREATE_POLYGON, APolygonTypeComputer.INSTANCE);
-        add(CREATE_RECTANGLE, ARectangleTypeComputer.INSTANCE);
+        addFunction(CONTAINS, ABooleanTypeComputer.INSTANCE);
+        addPrivateFunction(COUNT, AInt32TypeComputer.INSTANCE);
+        addFunction(COUNTHASHED_GRAM_TOKENS, OrderedListOfAInt32TypeComputer.INSTANCE);
+        addPrivateFunction(COUNTHASHED_WORD_TOKENS, OrderedListOfAInt32TypeComputer.INSTANCE);
+        addFunction(CREATE_CIRCLE, ACircleTypeComputer.INSTANCE);
+        addFunction(CREATE_LINE, ALineTypeComputer.INSTANCE);
+        addFunction(CREATE_MBR, ADoubleTypeComputer.INSTANCE);
+        addFunction(CREATE_POINT, APointTypeComputer.INSTANCE);
+        addFunction(CREATE_POLYGON, APolygonTypeComputer.INSTANCE);
+        addFunction(CREATE_RECTANGLE, ARectangleTypeComputer.INSTANCE);
 
-        add(DATE_CONSTRUCTOR, OptionalADateTypeComputer.INSTANCE);
-        add(DATETIME_CONSTRUCTOR, OptionalADateTimeTypeComputer.INSTANCE);
-        add(DOUBLE_CONSTRUCTOR, OptionalADoubleTypeComputer.INSTANCE);
-        add(DURATION_CONSTRUCTOR, OptionalADurationTypeComputer.INSTANCE);
-        add(YEAR_MONTH_DURATION_CONSTRUCTOR, OptionalAYearMonthDurationTypeComputer.INSTANCE);
-        add(DAY_TIME_DURATION_CONSTRUCTOR, OptionalADayTimeDurationTypeComputer.INSTANCE);
-        add(EDIT_DISTANCE, AInt32TypeComputer.INSTANCE);
-        add(EDIT_DISTANCE_CHECK, OrderedListOfAnyTypeComputer.INSTANCE);
-        add(EDIT_DISTANCE_STRING_IS_FILTERABLE, ABooleanTypeComputer.INSTANCE);
-        add(EDIT_DISTANCE_LIST_IS_FILTERABLE, ABooleanTypeComputer.INSTANCE);
-        add(EMBED_TYPE, new IResultTypeComputer() {
+        addFunction(DATE_CONSTRUCTOR, OptionalADateTypeComputer.INSTANCE);
+        addFunction(DATETIME_CONSTRUCTOR, OptionalADateTimeTypeComputer.INSTANCE);
+        addFunction(DOUBLE_CONSTRUCTOR, OptionalADoubleTypeComputer.INSTANCE);
+        addFunction(DURATION_CONSTRUCTOR, OptionalADurationTypeComputer.INSTANCE);
+        addFunction(YEAR_MONTH_DURATION_CONSTRUCTOR, OptionalAYearMonthDurationTypeComputer.INSTANCE);
+        addFunction(DAY_TIME_DURATION_CONSTRUCTOR, OptionalADayTimeDurationTypeComputer.INSTANCE);
+        addFunction(EDIT_DISTANCE, AInt32TypeComputer.INSTANCE);
+        addFunction(EDIT_DISTANCE_CHECK, OrderedListOfAnyTypeComputer.INSTANCE);
+        addPrivateFunction(EDIT_DISTANCE_STRING_IS_FILTERABLE, ABooleanTypeComputer.INSTANCE);
+        addPrivateFunction(EDIT_DISTANCE_LIST_IS_FILTERABLE, ABooleanTypeComputer.INSTANCE);
+        addPrivateFunction(EMBED_TYPE, new IResultTypeComputer() {
             @Override
             public IAType computeType(ILogicalExpression expression, IVariableTypeEnvironment env,
                     IMetadataProvider<?, ?> mp) throws AlgebricksException {
                 return (IAType) BuiltinType.ANY;
             }
         });
-        add(EMPTY_STREAM, ABooleanTypeComputer.INSTANCE);
-        add(ENDS_WITH, ABooleanTypeComputer.INSTANCE);
+        addPrivateFunction(EMPTY_STREAM, ABooleanTypeComputer.INSTANCE);
+        addFunction(ENDS_WITH, ABooleanTypeComputer.INSTANCE);
         // add(FIELD_ACCESS, NonTaggedFieldAccessByNameResultType.INSTANCE);
-        add(FIELD_ACCESS_BY_INDEX, FieldAccessByIndexResultType.INSTANCE);
-        add(FIELD_ACCESS_BY_NAME, NonTaggedFieldAccessByNameResultType.INSTANCE);
-        add(FLOAT_CONSTRUCTOR, OptionalAFloatTypeComputer.INSTANCE);
-        add(FUZZY_EQ, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
-        add(GET_HANDLE, null); // TODO
-        add(GET_ITEM, NonTaggedGetItemResultType.INSTANCE);
-        add(GET_DATA, null); // TODO
-        add(GLOBAL_AVG, OptionalADoubleTypeComputer.INSTANCE);
-        add(GRAM_TOKENS, OrderedListOfAStringTypeComputer.INSTANCE);
-        add(GLOBAL_AVG, OptionalADoubleTypeComputer.INSTANCE);
-        add(HASHED_GRAM_TOKENS, OrderedListOfAInt32TypeComputer.INSTANCE);
-        add(HASHED_WORD_TOKENS, OrderedListOfAInt32TypeComputer.INSTANCE);
-        add(INDEX_SEARCH, new IResultTypeComputer() {
+        addPrivateFunction(FIELD_ACCESS_BY_INDEX, FieldAccessByIndexResultType.INSTANCE);
+        addPrivateFunction(FIELD_ACCESS_BY_NAME, NonTaggedFieldAccessByNameResultType.INSTANCE);
+        addFunction(FLOAT_CONSTRUCTOR, OptionalAFloatTypeComputer.INSTANCE);
+        addPrivateFunction(FUZZY_EQ, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
+        addPrivateFunction(GET_HANDLE, null); // TODO
+        addPrivateFunction(GET_ITEM, NonTaggedGetItemResultType.INSTANCE);
+        addPrivateFunction(GET_DATA, null); // TODO
+        addPrivateFunction(GLOBAL_AVG, OptionalADoubleTypeComputer.INSTANCE);
+        addPrivateFunction(GRAM_TOKENS, OrderedListOfAStringTypeComputer.INSTANCE);
+        addFunction(GLOBAL_AVG, OptionalADoubleTypeComputer.INSTANCE);
+        addFunction(HASHED_GRAM_TOKENS, OrderedListOfAInt32TypeComputer.INSTANCE);
+        addPrivateFunction(HASHED_WORD_TOKENS, OrderedListOfAInt32TypeComputer.INSTANCE);
+        addPrivateFunction(INDEX_SEARCH, new IResultTypeComputer() {
 
             @Override
             public IAType computeType(ILogicalExpression expression, IVariableTypeEnvironment env,
@@ -673,95 +651,95 @@
                 return BuiltinType.ANY; // TODO
             }
         });
-        add(INT8_CONSTRUCTOR, OptionalAInt8TypeComputer.INSTANCE);
-        add(INT16_CONSTRUCTOR, OptionalAInt16TypeComputer.INSTANCE);
-        add(INT32_CONSTRUCTOR, OptionalAInt32TypeComputer.INSTANCE);
-        add(INT64_CONSTRUCTOR, OptionalAInt64TypeComputer.INSTANCE);
-        add(LEN, OptionalAInt32TypeComputer.INSTANCE);
-        add(LIKE, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
-        add(LINE_CONSTRUCTOR, OptionalALineTypeComputer.INSTANCE);
-        add(LISTIFY, OrderedListConstructorResultType.INSTANCE);
-        add(LOCAL_AVG, NonTaggedLocalAvgTypeComputer.INSTANCE);
-        add(MAKE_FIELD_INDEX_HANDLE, null); // TODO
-        add(MAKE_FIELD_NAME_HANDLE, null); // TODO
-        add(MAX, NonTaggedSumTypeComputer.INSTANCE);
-        add(LOCAL_MAX, NonTaggedSumTypeComputer.INSTANCE);
-        add(MIN, NonTaggedSumTypeComputer.INSTANCE);
-        add(LOCAL_MIN, NonTaggedSumTypeComputer.INSTANCE);
-        add(NON_EMPTY_STREAM, ABooleanTypeComputer.INSTANCE);
-        add(NULL_CONSTRUCTOR, ANullTypeComputer.INSTANCE);
-        add(NUMERIC_UNARY_MINUS, NonTaggedUnaryMinusTypeComputer.INSTANCE);
-        add(NUMERIC_SUBTRACT, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE);
-        add(NUMERIC_MULTIPLY, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE);
-        add(NUMERIC_DIVIDE, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE);
-        add(NUMERIC_MOD, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE);
-        add(NUMERIC_IDIV, AInt32TypeComputer.INSTANCE);
+        addFunction(INT8_CONSTRUCTOR, OptionalAInt8TypeComputer.INSTANCE);
+        addFunction(INT16_CONSTRUCTOR, OptionalAInt16TypeComputer.INSTANCE);
+        addFunction(INT32_CONSTRUCTOR, OptionalAInt32TypeComputer.INSTANCE);
+        addFunction(INT64_CONSTRUCTOR, OptionalAInt64TypeComputer.INSTANCE);
+        addFunction(LEN, OptionalAInt32TypeComputer.INSTANCE);
+        addFunction(LIKE, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
+        addFunction(LINE_CONSTRUCTOR, OptionalALineTypeComputer.INSTANCE);
+        addPrivateFunction(LISTIFY, OrderedListConstructorResultType.INSTANCE);
+        addPrivateFunction(LOCAL_AVG, NonTaggedLocalAvgTypeComputer.INSTANCE);
+        addPrivateFunction(MAKE_FIELD_INDEX_HANDLE, null); // TODO
+        addPrivateFunction(MAKE_FIELD_NAME_HANDLE, null); // TODO
+        addPrivateFunction(MAX, NonTaggedSumTypeComputer.INSTANCE);
+        addPrivateFunction(LOCAL_MAX, NonTaggedSumTypeComputer.INSTANCE);
+        addPrivateFunction(MIN, NonTaggedSumTypeComputer.INSTANCE);
+        addPrivateFunction(LOCAL_MIN, NonTaggedSumTypeComputer.INSTANCE);
+        addPrivateFunction(NON_EMPTY_STREAM, ABooleanTypeComputer.INSTANCE);
+        addFunction(NULL_CONSTRUCTOR, ANullTypeComputer.INSTANCE);
+        addFunction(NUMERIC_UNARY_MINUS, NonTaggedUnaryMinusTypeComputer.INSTANCE);
+        addFunction(NUMERIC_SUBTRACT, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE);
+        addFunction(NUMERIC_MULTIPLY, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE);
+        addFunction(NUMERIC_DIVIDE, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE);
+        addFunction(NUMERIC_MOD, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE);
+        addFunction(NUMERIC_IDIV, AInt32TypeComputer.INSTANCE);
 
-        add(NUMERIC_ABS, NonTaggedNumericUnaryFunctionTypeComputer.INSTANCE);
-        add(NUMERIC_CEILING, NonTaggedNumericUnaryFunctionTypeComputer.INSTANCE);
-        add(NUMERIC_FLOOR, NonTaggedNumericUnaryFunctionTypeComputer.INSTANCE);
-        add(NUMERIC_ROUND, NonTaggedNumericUnaryFunctionTypeComputer.INSTANCE);
-        add(NUMERIC_ROUND_HALF_TO_EVEN, NonTaggedNumericUnaryFunctionTypeComputer.INSTANCE);
-        add(NUMERIC_ROUND_HALF_TO_EVEN2, NonTaggedNumericRoundHalfToEven2TypeComputer.INSTANCE);
+        addFunction(NUMERIC_ABS, NonTaggedNumericUnaryFunctionTypeComputer.INSTANCE);
+        addFunction(NUMERIC_CEILING, NonTaggedNumericUnaryFunctionTypeComputer.INSTANCE);
+        addFunction(NUMERIC_FLOOR, NonTaggedNumericUnaryFunctionTypeComputer.INSTANCE);
+        addFunction(NUMERIC_ROUND, NonTaggedNumericUnaryFunctionTypeComputer.INSTANCE);
+        addFunction(NUMERIC_ROUND_HALF_TO_EVEN, NonTaggedNumericUnaryFunctionTypeComputer.INSTANCE);
+        addFunction(NUMERIC_ROUND_HALF_TO_EVEN2, NonTaggedNumericRoundHalfToEven2TypeComputer.INSTANCE);
 
-        add(STRING_TO_CODEPOINT, OrderedListOfAInt32TypeComputer.INSTANCE);
-        add(CODEPOINT_TO_STRING, AStringTypeComputer.INSTANCE);
-        add(STRING_CONCAT, OptionalAStringTypeComputer.INSTANCE);
-        add(SUBSTRING2, Substring2TypeComputer.INSTANCE);
-        add(STRING_LENGTH, UnaryStringInt32OrNullTypeComputer.INSTANCE);
-        add(STRING_LOWERCASE, UnaryStringOrNullTypeComputer.INSTANCE);
-        add(STRING_START_WITH, BinaryStringBoolOrNullTypeComputer.INSTANCE);
-        add(STRING_END_WITH, BinaryStringBoolOrNullTypeComputer.INSTANCE);
-        add(STRING_MATCHES, BinaryStringBoolOrNullTypeComputer.INSTANCE);
-        add(STRING_MATCHES_WITH_FLAG, TripleStringBoolOrNullTypeComputer.INSTANCE);
-        add(STRING_REPLACE, TripleStringStringOrNullTypeComputer.INSTANCE);
-        add(STRING_REPLACE_WITH_FLAG, QuadStringStringOrNullTypeComputer.INSTANCE);
-        add(SUBSTRING_BEFORE, BinaryStringStringOrNullTypeComputer.INSTANCE);
-        add(SUBSTRING_AFTER, BinaryStringStringOrNullTypeComputer.INSTANCE);
-        add(STRING_EQUAL, BinaryStringBoolOrNullTypeComputer.INSTANCE);
-        add(STRING_JOIN, AStringTypeComputer.INSTANCE);
+        addFunction(STRING_TO_CODEPOINT, OrderedListOfAInt32TypeComputer.INSTANCE);
+        addFunction(CODEPOINT_TO_STRING, AStringTypeComputer.INSTANCE);
+        addFunction(STRING_CONCAT, OptionalAStringTypeComputer.INSTANCE);
+        addFunction(SUBSTRING2, Substring2TypeComputer.INSTANCE);
+        addFunction(STRING_LENGTH, UnaryStringInt32OrNullTypeComputer.INSTANCE);
+        addFunction(STRING_LOWERCASE, UnaryStringOrNullTypeComputer.INSTANCE);
+        addFunction(STRING_START_WITH, BinaryStringBoolOrNullTypeComputer.INSTANCE);
+        addFunction(STRING_END_WITH, BinaryStringBoolOrNullTypeComputer.INSTANCE);
+        addFunction(STRING_MATCHES, BinaryStringBoolOrNullTypeComputer.INSTANCE);
+        addFunction(STRING_MATCHES_WITH_FLAG, TripleStringBoolOrNullTypeComputer.INSTANCE);
+        addFunction(STRING_REPLACE, TripleStringStringOrNullTypeComputer.INSTANCE);
+        addFunction(STRING_REPLACE_WITH_FLAG, QuadStringStringOrNullTypeComputer.INSTANCE);
+        addFunction(SUBSTRING_BEFORE, BinaryStringStringOrNullTypeComputer.INSTANCE);
+        addFunction(SUBSTRING_AFTER, BinaryStringStringOrNullTypeComputer.INSTANCE);
+        addPrivateFunction(STRING_EQUAL, BinaryStringBoolOrNullTypeComputer.INSTANCE);
+        addFunction(STRING_JOIN, AStringTypeComputer.INSTANCE);
 
-        add(OPEN_RECORD_CONSTRUCTOR, OpenRecordConstructorResultType.INSTANCE);
-        add(ORDERED_LIST_CONSTRUCTOR, OrderedListConstructorResultType.INSTANCE);
-        add(POINT_CONSTRUCTOR, OptionalAPointTypeComputer.INSTANCE);
-        add(POINT3D_CONSTRUCTOR, OptionalAPoint3DTypeComputer.INSTANCE);
-        add(POLYGON_CONSTRUCTOR, OptionalAPolygonTypeComputer.INSTANCE);
-        add(PREFIX_LEN_JACCARD, AInt32TypeComputer.INSTANCE);
-        add(RANGE, AInt32TypeComputer.INSTANCE);
-        add(RECTANGLE_CONSTRUCTOR, OptionalARectangleTypeComputer.INSTANCE);
+        addPrivateFunction(OPEN_RECORD_CONSTRUCTOR, OpenRecordConstructorResultType.INSTANCE);
+        addPrivateFunction(ORDERED_LIST_CONSTRUCTOR, OrderedListConstructorResultType.INSTANCE);
+        addFunction(POINT_CONSTRUCTOR, OptionalAPointTypeComputer.INSTANCE);
+        addFunction(POINT3D_CONSTRUCTOR, OptionalAPoint3DTypeComputer.INSTANCE);
+        addFunction(POLYGON_CONSTRUCTOR, OptionalAPolygonTypeComputer.INSTANCE);
+        addPrivateFunction(PREFIX_LEN_JACCARD, AInt32TypeComputer.INSTANCE);
+        addFunction(RANGE, AInt32TypeComputer.INSTANCE);
+        addFunction(RECTANGLE_CONSTRUCTOR, OptionalARectangleTypeComputer.INSTANCE);
         // add(RECORD_TYPE_CONSTRUCTOR, null);
-        add(SCALAR_AVG, ScalarVersionOfAggregateResultType.INSTANCE);
-        add(SCALAR_COUNT, AInt32TypeComputer.INSTANCE);
-        add(SCALAR_GLOBAL_AVG, ScalarVersionOfAggregateResultType.INSTANCE);
-        add(SCALAR_LOCAL_AVG, ScalarVersionOfAggregateResultType.INSTANCE);
-        add(SCALAR_MAX, ScalarVersionOfAggregateResultType.INSTANCE);
-        add(SCALAR_MIN, ScalarVersionOfAggregateResultType.INSTANCE);
-        add(SCALAR_SUM, ScalarVersionOfAggregateResultType.INSTANCE);
-        add(SCAN_COLLECTION, NonTaggedCollectionMemberResultType.INSTANCE);
-        add(SERIAL_AVG, OptionalADoubleTypeComputer.INSTANCE);
-        add(SERIAL_COUNT, AInt32TypeComputer.INSTANCE);
-        add(SERIAL_GLOBAL_AVG, OptionalADoubleTypeComputer.INSTANCE);
-        add(SERIAL_LOCAL_AVG, NonTaggedLocalAvgTypeComputer.INSTANCE);
-        add(SERIAL_SUM, NonTaggedSumTypeComputer.INSTANCE);
-        add(SERIAL_LOCAL_SUM, NonTaggedSumTypeComputer.INSTANCE);
-        add(SIMILARITY_JACCARD, AFloatTypeComputer.INSTANCE);
-        add(SIMILARITY_JACCARD_CHECK, OrderedListOfAnyTypeComputer.INSTANCE);
-        add(SIMILARITY_JACCARD_SORTED, AFloatTypeComputer.INSTANCE);
-        add(SIMILARITY_JACCARD_SORTED_CHECK, OrderedListOfAnyTypeComputer.INSTANCE);
-        add(SIMILARITY_JACCARD_PREFIX, AFloatTypeComputer.INSTANCE);
-        add(SIMILARITY_JACCARD_PREFIX_CHECK, OrderedListOfAnyTypeComputer.INSTANCE);
-        add(SPATIAL_AREA, ADoubleTypeComputer.INSTANCE);
-        add(SPATIAL_CELL, ARectangleTypeComputer.INSTANCE);
-        add(SPATIAL_DISTANCE, ADoubleTypeComputer.INSTANCE);
-        add(SPATIAL_INTERSECT, ABooleanTypeComputer.INSTANCE);
-        add(GET_POINT_X_COORDINATE_ACCESSOR, ADoubleTypeComputer.INSTANCE);
-        add(GET_POINT_Y_COORDINATE_ACCESSOR, ADoubleTypeComputer.INSTANCE);
-        add(GET_CIRCLE_RADIUS_ACCESSOR, ADoubleTypeComputer.INSTANCE);
-        add(GET_CIRCLE_CENTER_ACCESSOR, APointTypeComputer.INSTANCE);
-        add(GET_POINTS_LINE_RECTANGLE_POLYGON_ACCESSOR, OrderedListOfAPointTypeComputer.INSTANCE);
-        add(STARTS_WITH, ABooleanTypeComputer.INSTANCE);
-        add(STRING_CONSTRUCTOR, OptionalAStringTypeComputer.INSTANCE);
-        add(SUBSET_COLLECTION, new IResultTypeComputer() {
+        addFunction(SCALAR_AVG, ScalarVersionOfAggregateResultType.INSTANCE);
+        addFunction(SCALAR_COUNT, AInt32TypeComputer.INSTANCE);
+        addPrivateFunction(SCALAR_GLOBAL_AVG, ScalarVersionOfAggregateResultType.INSTANCE);
+        addPrivateFunction(SCALAR_LOCAL_AVG, ScalarVersionOfAggregateResultType.INSTANCE);
+        addFunction(SCALAR_MAX, ScalarVersionOfAggregateResultType.INSTANCE);
+        addFunction(SCALAR_MIN, ScalarVersionOfAggregateResultType.INSTANCE);
+        addFunction(SCALAR_SUM, ScalarVersionOfAggregateResultType.INSTANCE);
+        addPrivateFunction(SCAN_COLLECTION, NonTaggedCollectionMemberResultType.INSTANCE);
+        addPrivateFunction(SERIAL_AVG, OptionalADoubleTypeComputer.INSTANCE);
+        addPrivateFunction(SERIAL_COUNT, AInt32TypeComputer.INSTANCE);
+        addPrivateFunction(SERIAL_GLOBAL_AVG, OptionalADoubleTypeComputer.INSTANCE);
+        addPrivateFunction(SERIAL_LOCAL_AVG, NonTaggedLocalAvgTypeComputer.INSTANCE);
+        addPrivateFunction(SERIAL_SUM, NonTaggedSumTypeComputer.INSTANCE);
+        addPrivateFunction(SERIAL_LOCAL_SUM, NonTaggedSumTypeComputer.INSTANCE);
+        addFunction(SIMILARITY_JACCARD, AFloatTypeComputer.INSTANCE);
+        addFunction(SIMILARITY_JACCARD_CHECK, OrderedListOfAnyTypeComputer.INSTANCE);
+        addPrivateFunction(SIMILARITY_JACCARD_SORTED, AFloatTypeComputer.INSTANCE);
+        addPrivateFunction(SIMILARITY_JACCARD_SORTED_CHECK, OrderedListOfAnyTypeComputer.INSTANCE);
+        addPrivateFunction(SIMILARITY_JACCARD_PREFIX, AFloatTypeComputer.INSTANCE);
+        addPrivateFunction(SIMILARITY_JACCARD_PREFIX_CHECK, OrderedListOfAnyTypeComputer.INSTANCE);
+        addFunction(SPATIAL_AREA, ADoubleTypeComputer.INSTANCE);
+        addFunction(SPATIAL_CELL, ARectangleTypeComputer.INSTANCE);
+        addFunction(SPATIAL_DISTANCE, ADoubleTypeComputer.INSTANCE);
+        addFunction(SPATIAL_INTERSECT, ABooleanTypeComputer.INSTANCE);
+        addFunction(GET_POINT_X_COORDINATE_ACCESSOR, ADoubleTypeComputer.INSTANCE);
+        addFunction(GET_POINT_Y_COORDINATE_ACCESSOR, ADoubleTypeComputer.INSTANCE);
+        addFunction(GET_CIRCLE_RADIUS_ACCESSOR, ADoubleTypeComputer.INSTANCE);
+        addFunction(GET_CIRCLE_CENTER_ACCESSOR, APointTypeComputer.INSTANCE);
+        addFunction(GET_POINTS_LINE_RECTANGLE_POLYGON_ACCESSOR, OrderedListOfAPointTypeComputer.INSTANCE);
+        addFunction(STARTS_WITH, ABooleanTypeComputer.INSTANCE);
+        addFunction(STRING_CONSTRUCTOR, OptionalAStringTypeComputer.INSTANCE);
+        addPrivateFunction(SUBSET_COLLECTION, new IResultTypeComputer() {
 
             @Override
             public IAType computeType(ILogicalExpression expression, IVariableTypeEnvironment env,
@@ -798,20 +776,20 @@
                 }
             }
         });
-        add(SUBSTRING, SubstringTypeComputer.INSTANCE);
-        add(SUM, NonTaggedSumTypeComputer.INSTANCE);
-        add(LOCAL_SUM, NonTaggedSumTypeComputer.INSTANCE);
-        add(SWITCH_CASE, NonTaggedSwitchCaseComputer.INSTANCE);
-        add(REG_EXP, ABooleanTypeComputer.INSTANCE);
-        add(INJECT_FAILURE, InjectFailureTypeComputer.INSTANCE);
-        add(CAST_RECORD, CastRecordResultTypeComputer.INSTANCE);
-        add(CAST_LIST, CastListResultTypeComputer.INSTANCE);
+        addFunction(SUBSTRING, SubstringTypeComputer.INSTANCE);
+        addPrivateFunction(SUM, NonTaggedSumTypeComputer.INSTANCE);
+        addPrivateFunction(LOCAL_SUM, NonTaggedSumTypeComputer.INSTANCE);
+        addFunction(SWITCH_CASE, NonTaggedSwitchCaseComputer.INSTANCE);
+        addPrivateFunction(REG_EXP, ABooleanTypeComputer.INSTANCE);
+        addFunction(INJECT_FAILURE, InjectFailureTypeComputer.INSTANCE);
+        addPrivateFunction(CAST_RECORD, CastRecordResultTypeComputer.INSTANCE);
+        addFunction(CAST_LIST, CastListResultTypeComputer.INSTANCE);
 
-        add(TID, AInt32TypeComputer.INSTANCE);
-        add(TIME_CONSTRUCTOR, OptionalATimeTypeComputer.INSTANCE);
-        add(TYPE_OF, null); // TODO
-        add(UNORDERED_LIST_CONSTRUCTOR, UnorderedListConstructorResultType.INSTANCE);
-        add(WORD_TOKENS, new IResultTypeComputer() {
+        addFunction(TID, AInt32TypeComputer.INSTANCE);
+        addFunction(TIME_CONSTRUCTOR, OptionalATimeTypeComputer.INSTANCE);
+        addFunction(TYPE_OF, null); // TODO
+        addPrivateFunction(UNORDERED_LIST_CONSTRUCTOR, UnorderedListConstructorResultType.INSTANCE);
+        addFunction(WORD_TOKENS, new IResultTypeComputer() {
 
             @Override
             public IAType computeType(ILogicalExpression expression, IVariableTypeEnvironment env,
@@ -821,68 +799,68 @@
         });
 
         // temporal type accessors
-        add(ACCESSOR_TEMPORAL_YEAR, OptionalAInt32TypeComputer.INSTANCE);
-        add(ACCESSOR_TEMPORAL_MONTH, OptionalAInt32TypeComputer.INSTANCE);
-        add(ACCESSOR_TEMPORAL_DAY, OptionalAInt32TypeComputer.INSTANCE);
-        add(ACCESSOR_TEMPORAL_HOUR, OptionalAInt32TypeComputer.INSTANCE);
-        add(ACCESSOR_TEMPORAL_MIN, OptionalAInt32TypeComputer.INSTANCE);
-        add(ACCESSOR_TEMPORAL_SEC, OptionalAInt32TypeComputer.INSTANCE);
-        add(ACCESSOR_TEMPORAL_MILLISEC, OptionalAInt32TypeComputer.INSTANCE);
-        add(ACCESSOR_TEMPORAL_INTERVAL_START, OptionalATemporalInstanceTypeComputer.INSTANCE);
-        add(ACCESSOR_TEMPORAL_INTERVAL_END, OptionalATemporalInstanceTypeComputer.INSTANCE);
+        addFunction(ACCESSOR_TEMPORAL_YEAR, OptionalAInt32TypeComputer.INSTANCE);
+        addFunction(ACCESSOR_TEMPORAL_MONTH, OptionalAInt32TypeComputer.INSTANCE);
+        addFunction(ACCESSOR_TEMPORAL_DAY, OptionalAInt32TypeComputer.INSTANCE);
+        addFunction(ACCESSOR_TEMPORAL_HOUR, OptionalAInt32TypeComputer.INSTANCE);
+        addFunction(ACCESSOR_TEMPORAL_MIN, OptionalAInt32TypeComputer.INSTANCE);
+        addFunction(ACCESSOR_TEMPORAL_SEC, OptionalAInt32TypeComputer.INSTANCE);
+        addFunction(ACCESSOR_TEMPORAL_MILLISEC, OptionalAInt32TypeComputer.INSTANCE);
+        addFunction(ACCESSOR_TEMPORAL_INTERVAL_START, OptionalATemporalInstanceTypeComputer.INSTANCE);
+        addFunction(ACCESSOR_TEMPORAL_INTERVAL_END, OptionalATemporalInstanceTypeComputer.INSTANCE);
 
         // temporal functions
-        add(DATE_FROM_UNIX_TIME_IN_DAYS, OptionalADateTypeComputer.INSTANCE);
-        add(DATE_FROM_DATETIME, OptionalADateTypeComputer.INSTANCE);
-        add(ADD_DATE_DURATION, OptionalADateTypeComputer.INSTANCE);
-        add(SUBTRACT_DATE, OptionalADurationTypeComputer.INSTANCE);
-        add(TIME_FROM_UNIX_TIME_IN_MS, OptionalATimeTypeComputer.INSTANCE);
-        add(TIME_FROM_DATETIME, OptionalATimeTypeComputer.INSTANCE);
-        add(SUBTRACT_TIME, OptionalADurationTypeComputer.INSTANCE);
-        add(ADD_TIME_DURATION, OptionalATimeTypeComputer.INSTANCE);
-        add(DATETIME_FROM_DATE_TIME, OptionalADateTimeTypeComputer.INSTANCE);
-        add(DATETIME_FROM_UNIX_TIME_IN_MS, OptionalADateTimeTypeComputer.INSTANCE);
-        add(SUBTRACT_DATETIME, OptionalADurationTypeComputer.INSTANCE);
-        add(ADD_DATETIME_DURATION, OptionalADateTimeTypeComputer.INSTANCE);
-        add(CALENDAR_DURATION_FROM_DATETIME, OptionalADurationTypeComputer.INSTANCE);
-        add(CALENDAR_DURATION_FROM_DATE, OptionalADurationTypeComputer.INSTANCE);
-        add(ADJUST_DATETIME_FOR_TIMEZONE, OptionalAStringTypeComputer.INSTANCE);
-        add(ADJUST_TIME_FOR_TIMEZONE, OptionalAStringTypeComputer.INSTANCE);
-        add(INTERVAL_BEFORE, OptionalABooleanTypeComputer.INSTANCE);
-        add(INTERVAL_AFTER, OptionalABooleanTypeComputer.INSTANCE);
-        add(INTERVAL_MEETS, OptionalABooleanTypeComputer.INSTANCE);
-        add(INTERVAL_MET_BY, OptionalABooleanTypeComputer.INSTANCE);
-        add(INTERVAL_OVERLAPS, OptionalABooleanTypeComputer.INSTANCE);
-        add(INTERVAL_OVERLAPPED_BY, OptionalABooleanTypeComputer.INSTANCE);
-        add(OVERLAP, OptionalABooleanTypeComputer.INSTANCE);
-        add(INTERVAL_STARTS, OptionalABooleanTypeComputer.INSTANCE);
-        add(INTERVAL_STARTED_BY, OptionalABooleanTypeComputer.INSTANCE);
-        add(INTERVAL_COVERS, OptionalABooleanTypeComputer.INSTANCE);
-        add(INTERVAL_COVERED_BY, OptionalABooleanTypeComputer.INSTANCE);
-        add(INTERVAL_ENDS, OptionalABooleanTypeComputer.INSTANCE);
-        add(INTERVAL_ENDED_BY, OptionalABooleanTypeComputer.INSTANCE);
-        add(CURRENT_DATE, ADateTypeComputer.INSTANCE);
-        add(CURRENT_TIME, ATimeTypeComputer.INSTANCE);
-        add(CURRENT_DATETIME, ADateTimeTypeComputer.INSTANCE);
-        add(DAY_TIME_DURATION_GREATER_THAN, OptionalABooleanTypeComputer.INSTANCE);
-        add(DAY_TIME_DURATION_LESS_THAN, OptionalABooleanTypeComputer.INSTANCE);
-        add(YEAR_MONTH_DURATION_GREATER_THAN, OptionalABooleanTypeComputer.INSTANCE);
-        add(YEAR_MONTH_DURATION_LESS_THAN, OptionalABooleanTypeComputer.INSTANCE);
-        add(DURATION_EQUAL, OptionalABooleanTypeComputer.INSTANCE);
-        add(DURATION_FROM_MONTHS, OptionalADurationTypeComputer.INSTANCE);
-        add(DURATION_FROM_MILLISECONDS, OptionalADurationTypeComputer.INSTANCE);
-        add(MONTHS_FROM_YEAR_MONTH_DURATION, OptionalAInt32TypeComputer.INSTANCE);
-        add(MILLISECONDS_FROM_DAY_TIME_DURATION, OptionalAInt64TypeComputer.INSTANCE);
-        add(GET_DAY_TIME_DURATION, OptionalADayTimeDurationTypeComputer.INSTANCE);
-        add(GET_YEAR_MONTH_DURATION, OptionalAYearMonthDurationTypeComputer.INSTANCE);
+        addFunction(DATE_FROM_UNIX_TIME_IN_DAYS, OptionalADateTypeComputer.INSTANCE);
+        addFunction(DATE_FROM_DATETIME, OptionalADateTypeComputer.INSTANCE);
+        addFunction(ADD_DATE_DURATION, OptionalADateTypeComputer.INSTANCE);
+        addFunction(SUBTRACT_DATE, OptionalADurationTypeComputer.INSTANCE);
+        addFunction(TIME_FROM_UNIX_TIME_IN_MS, OptionalATimeTypeComputer.INSTANCE);
+        addFunction(TIME_FROM_DATETIME, OptionalATimeTypeComputer.INSTANCE);
+        addFunction(SUBTRACT_TIME, OptionalADurationTypeComputer.INSTANCE);
+        addFunction(ADD_TIME_DURATION, OptionalATimeTypeComputer.INSTANCE);
+        addFunction(DATETIME_FROM_DATE_TIME, OptionalADateTimeTypeComputer.INSTANCE);
+        addFunction(DATETIME_FROM_UNIX_TIME_IN_MS, OptionalADateTimeTypeComputer.INSTANCE);
+        addFunction(SUBTRACT_DATETIME, OptionalADurationTypeComputer.INSTANCE);
+        addFunction(ADD_DATETIME_DURATION, OptionalADateTimeTypeComputer.INSTANCE);
+        addFunction(CALENDAR_DURATION_FROM_DATETIME, OptionalADurationTypeComputer.INSTANCE);
+        addFunction(CALENDAR_DURATION_FROM_DATE, OptionalADurationTypeComputer.INSTANCE);
+        addFunction(ADJUST_DATETIME_FOR_TIMEZONE, OptionalAStringTypeComputer.INSTANCE);
+        addFunction(ADJUST_TIME_FOR_TIMEZONE, OptionalAStringTypeComputer.INSTANCE);
+        addFunction(INTERVAL_BEFORE, OptionalABooleanTypeComputer.INSTANCE);
+        addFunction(INTERVAL_AFTER, OptionalABooleanTypeComputer.INSTANCE);
+        addFunction(INTERVAL_MEETS, OptionalABooleanTypeComputer.INSTANCE);
+        addFunction(INTERVAL_MET_BY, OptionalABooleanTypeComputer.INSTANCE);
+        addFunction(INTERVAL_OVERLAPS, OptionalABooleanTypeComputer.INSTANCE);
+        addFunction(INTERVAL_OVERLAPPED_BY, OptionalABooleanTypeComputer.INSTANCE);
+        addFunction(OVERLAP, OptionalABooleanTypeComputer.INSTANCE);
+        addFunction(INTERVAL_STARTS, OptionalABooleanTypeComputer.INSTANCE);
+        addFunction(INTERVAL_STARTED_BY, OptionalABooleanTypeComputer.INSTANCE);
+        addFunction(INTERVAL_COVERS, OptionalABooleanTypeComputer.INSTANCE);
+        addFunction(INTERVAL_COVERED_BY, OptionalABooleanTypeComputer.INSTANCE);
+        addFunction(INTERVAL_ENDS, OptionalABooleanTypeComputer.INSTANCE);
+        addFunction(INTERVAL_ENDED_BY, OptionalABooleanTypeComputer.INSTANCE);
+        addFunction(CURRENT_DATE, ADateTypeComputer.INSTANCE);
+        addFunction(CURRENT_TIME, ATimeTypeComputer.INSTANCE);
+        addFunction(CURRENT_DATETIME, ADateTimeTypeComputer.INSTANCE);
+        addFunction(DAY_TIME_DURATION_GREATER_THAN, OptionalABooleanTypeComputer.INSTANCE);
+        addPrivateFunction(DAY_TIME_DURATION_LESS_THAN, OptionalABooleanTypeComputer.INSTANCE);
+        addPrivateFunction(YEAR_MONTH_DURATION_GREATER_THAN, OptionalABooleanTypeComputer.INSTANCE);
+        addPrivateFunction(YEAR_MONTH_DURATION_LESS_THAN, OptionalABooleanTypeComputer.INSTANCE);
+        addPrivateFunction(DURATION_EQUAL, OptionalABooleanTypeComputer.INSTANCE);
+        addFunction(DURATION_FROM_MONTHS, OptionalADurationTypeComputer.INSTANCE);
+        addFunction(DURATION_FROM_MILLISECONDS, OptionalADurationTypeComputer.INSTANCE);
+        addFunction(MONTHS_FROM_YEAR_MONTH_DURATION, OptionalAInt32TypeComputer.INSTANCE);
+        addFunction(MILLISECONDS_FROM_DAY_TIME_DURATION, OptionalAInt64TypeComputer.INSTANCE);
+        addFunction(GET_DAY_TIME_DURATION, OptionalADayTimeDurationTypeComputer.INSTANCE);
+        addFunction(GET_YEAR_MONTH_DURATION, OptionalAYearMonthDurationTypeComputer.INSTANCE);
 
         // interval constructors
-        add(INTERVAL_CONSTRUCTOR_DATE, OptionalAIntervalTypeComputer.INSTANCE);
-        add(INTERVAL_CONSTRUCTOR_TIME, OptionalAIntervalTypeComputer.INSTANCE);
-        add(INTERVAL_CONSTRUCTOR_DATETIME, OptionalAIntervalTypeComputer.INSTANCE);
-        add(INTERVAL_CONSTRUCTOR_START_FROM_DATE, OptionalAIntervalTypeComputer.INSTANCE);
-        add(INTERVAL_CONSTRUCTOR_START_FROM_DATETIME, OptionalAIntervalTypeComputer.INSTANCE);
-        add(INTERVAL_CONSTRUCTOR_START_FROM_TIME, OptionalAIntervalTypeComputer.INSTANCE);
+        addFunction(INTERVAL_CONSTRUCTOR_DATE, OptionalAIntervalTypeComputer.INSTANCE);
+        addFunction(INTERVAL_CONSTRUCTOR_TIME, OptionalAIntervalTypeComputer.INSTANCE);
+        addFunction(INTERVAL_CONSTRUCTOR_DATETIME, OptionalAIntervalTypeComputer.INSTANCE);
+        addFunction(INTERVAL_CONSTRUCTOR_START_FROM_DATE, OptionalAIntervalTypeComputer.INSTANCE);
+        addFunction(INTERVAL_CONSTRUCTOR_START_FROM_DATETIME, OptionalAIntervalTypeComputer.INSTANCE);
+        addFunction(INTERVAL_CONSTRUCTOR_START_FROM_TIME, OptionalAIntervalTypeComputer.INSTANCE);
 
         String metadataFunctionLoaderClassName = "edu.uci.ics.asterix.metadata.functions.MetadataBuiltinFunctions";
         try {
@@ -976,8 +954,27 @@
         return datasetFunctions.contains(getAsterixFunctionInfo(fi));
     }
 
-    public static boolean isBuiltinCompilerFunction(FunctionIdentifier fi) {
-        return builtinFunctionsSet.keySet().contains(getAsterixFunctionInfo(fi));
+    public static boolean isBuiltinCompilerFunction(FunctionIdentifier fi, boolean includePrivateFunctions) {
+        return builtinPublicFunctionsSet.keySet().contains(getAsterixFunctionInfo(fi));
+    }
+
+    public static boolean isBuiltinCompilerFunction(FunctionSignature signature, boolean includePrivateFunctions) {
+
+        FunctionIdentifier fi = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, signature.getName(),
+                signature.getArity());
+        IFunctionInfo finfo = getAsterixFunctionInfo(fi);
+        if (builtinPublicFunctionsSet.keySet().contains(finfo)
+                || (includePrivateFunctions && builtinPrivateFunctionsSet.keySet().contains(finfo))) {
+            return true;
+        }
+        fi = new FunctionIdentifier(AlgebricksBuiltinFunctions.ALGEBRICKS_NS, signature.getName(), signature.getArity());
+        finfo = getAsterixFunctionInfo(fi);
+        if (builtinPublicFunctionsSet.keySet().contains(finfo)
+                || (includePrivateFunctions && builtinPrivateFunctionsSet.keySet().contains(finfo))) {
+            return true;
+        }
+
+        return false;
     }
 
     public static boolean isBuiltinAggregateFunction(FunctionIdentifier fi) {
@@ -1062,9 +1059,16 @@
         return finfo == null ? null : finfo.getFunctionIdentifier();
     }
 
-    public static void add(FunctionIdentifier fi, IResultTypeComputer typeComputer) {
+    public static void addFunction(FunctionIdentifier fi, IResultTypeComputer typeComputer) {
         IFunctionInfo functionInfo = getAsterixFunctionInfo(fi);
-        builtinFunctionsSet.put(functionInfo, functionInfo);
+        builtinPublicFunctionsSet.put(functionInfo, functionInfo);
+        funTypeComputer.put(functionInfo, typeComputer);
+        registeredFunctions.put(fi);
+    }
+
+    public static void addPrivateFunction(FunctionIdentifier fi, IResultTypeComputer typeComputer) {
+        IFunctionInfo functionInfo = getAsterixFunctionInfo(fi);
+        builtinPrivateFunctionsSet.put(functionInfo, functionInfo);
         funTypeComputer.put(functionInfo, typeComputer);
         registeredFunctions.put(fi);
     }
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/typecomputer/impl/UnaryStringInt32OrNullTypeComputer.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/typecomputer/impl/UnaryStringInt32OrNullTypeComputer.java
index 2d3018d..7b82c41 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/om/typecomputer/impl/UnaryStringInt32OrNullTypeComputer.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/typecomputer/impl/UnaryStringInt32OrNullTypeComputer.java
@@ -1,6 +1,5 @@
 package edu.uci.ics.asterix.om.typecomputer.impl;
 
-
 import java.util.ArrayList;
 import java.util.List;
 
@@ -17,20 +16,21 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.metadata.IMetadataProvider;
 
 /**
- *
  * @author Xiaoyu Ma
  */
-public class UnaryStringInt32OrNullTypeComputer implements IResultTypeComputer  {   
-    
+public class UnaryStringInt32OrNullTypeComputer implements IResultTypeComputer {
+
     public static final UnaryStringInt32OrNullTypeComputer INSTANCE = new UnaryStringInt32OrNullTypeComputer();
-    private UnaryStringInt32OrNullTypeComputer() {}
-    
+
+    private UnaryStringInt32OrNullTypeComputer() {
+    }
+
     @Override
     public IAType computeType(ILogicalExpression expression, IVariableTypeEnvironment env,
             IMetadataProvider<?, ?> metadataProvider) throws AlgebricksException {
         AbstractFunctionCallExpression fce = (AbstractFunctionCallExpression) expression;
-        if(fce.getArguments().isEmpty())
-            throw new AlgebricksException("Wrong Argument Number.");        
+        if (fce.getArguments().isEmpty())
+            throw new AlgebricksException("Wrong Argument Number.");
         ILogicalExpression arg0 = fce.getArguments().get(0).getValue();
         IAType t0;
         try {
@@ -38,21 +38,23 @@
         } catch (AlgebricksException e) {
             throw new AlgebricksException(e);
         }
-        if (t0.getTypeTag() != ATypeTag.NULL &&
-            t0.getTypeTag() != ATypeTag.STRING ) {
+        if (t0.getTypeTag() != ATypeTag.NULL
+                && t0.getTypeTag() != ATypeTag.STRING
+                && (t0.getTypeTag() == ATypeTag.UNION && !((AUnionType) t0).getUnionList()
+                        .contains(BuiltinType.ASTRING))) {
             throw new NotImplementedException("Expects String Type.");
-        }     
-        
+        }
+
         List<IAType> unionList = new ArrayList<IAType>();
         unionList.add(BuiltinType.ANULL);
-        if(t0.getTypeTag() == ATypeTag.NULL) {
+        if (t0.getTypeTag() == ATypeTag.NULL) { 
             return BuiltinType.ANULL;
         }
-        
-        if(t0.getTypeTag() == ATypeTag.STRING) {
+
+        if (t0.getTypeTag() == ATypeTag.STRING || t0.getTypeTag().equals(ATypeTag.UNION)) {
             unionList.add(BuiltinType.AINT32);
-        }        
-        
+        }
+
         return new AUnionType(unionList, "String-length-Result");
-    }      
+    }
 }
diff --git a/pom.xml b/pom.xml
index c313bd7..aa0bc82 100644
--- a/pom.xml
+++ b/pom.xml
@@ -135,14 +135,6 @@
 			<url>http://obelix.ics.uci.edu/nexus/content/repositories/algebricks-snapshots/</url>
 		</repository>
 	</repositories>
-    <dependencies>
-        <dependency>
-            <groupId>net.sourceforge.cobertura</groupId>
-            <artifactId>cobertura</artifactId>
-            <version>1.9.4</version>
-            <optional>true</optional>
-        </dependency>
-    </dependencies>
         <dependencyManagement>
     	<dependencies>
     		<dependency>