diff --git a/CMakeLists.txt b/CMakeLists.txt
index 30eb38f6c..e5e96dbeb 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -155,7 +155,7 @@ SET (ENGINE_TOOLSDIR   "${INSTALL_ENGINE}/tools")
 SET (ENGINE_COMMON_LIBS     messageqcpp loggingcpp configcpp idbboot ${Boost_LIBRARIES} xml2 pthread rt libmysql_client)
 SET (ENGINE_OAM_LIBS        oamcpp alarmmanager)
 SET (ENGINE_BRM_LIBS        brm idbdatafile cacheutils rwlock ${ENGINE_OAM_LIBS} ${ENGINE_COMMON_LIBS})
-SET (ENGINE_EXEC_LIBS       joblist execplan windowfunction joiner rowgroup funcexp udfsdk dataconvert common compress querystats querytele thrift threadpool ${ENGINE_BRM_LIBS})
+SET (ENGINE_EXEC_LIBS       joblist execplan windowfunction joiner rowgroup funcexp udfsdk regr dataconvert common compress querystats querytele thrift threadpool ${ENGINE_BRM_LIBS})
 SET (ENGINE_WRITE_LIBS      ddlpackageproc ddlpackage dmlpackageproc dmlpackage writeengine writeengineclient idbdatafile cacheutils ${ENGINE_EXEC_LIBS})
 
 SET (ENGINE_COMMON_LDFLAGS  "")
diff --git a/dbcon/joblist/tupleaggregatestep.cpp b/dbcon/joblist/tupleaggregatestep.cpp
index 429d5821d..97a577f4f 100644
--- a/dbcon/joblist/tupleaggregatestep.cpp
+++ b/dbcon/joblist/tupleaggregatestep.cpp
@@ -3876,6 +3876,7 @@ void TupleAggregateStep::prep2PhasesDistinctAggregate(
 
         // column index for PM aggregate rowgroup
         uint64_t colAggPm = 0;
+        uint64_t multiParm = 0;
 
         // for groupby column
         for (uint64_t i = 0; i < jobInfo.groupByColVec.size(); i++)
@@ -4027,7 +4028,7 @@ void TupleAggregateStep::prep2PhasesDistinctAggregate(
                 continue;
 
             functionVecPm.push_back(funct);
-            aggFuncMap.insert(make_pair(boost::make_tuple(aggKey, aggOp, pUDAFFunc), colAggPm));
+            aggFuncMap.insert(make_pair(boost::make_tuple(aggKey, aggOp, pUDAFFunc), colAggPm-multiParm));
 
             switch (aggOp)
             {
@@ -4247,7 +4248,8 @@ void TupleAggregateStep::prep2PhasesDistinctAggregate(
                     typeAggPm.push_back(typeProj[colProj]);
                     widthAggPm.push_back(width[colProj]);
                     multiParmIndexes.push_back(colAggPm);
-                    colAggPm++;
+                    ++colAggPm;
+                    ++multiParm;
                     // If the param is const
                     if (udafc)
                     {
@@ -4414,7 +4416,7 @@ void TupleAggregateStep::prep2PhasesDistinctAggregate(
 
                 if (it != aggFuncMap.end())
                 {
-                    colUm = it->second - multiParms;
+                    colUm = it->second;
                 }
             }
 
@@ -4517,14 +4519,13 @@ void TupleAggregateStep::prep2PhasesDistinctAggregate(
 
                 if (it != aggFuncMap.end())
                 {
-                    colUm = it->second - multiParms;
+                    colUm = it->second;
                     oidsAggDist.push_back(oidsAggUm[colUm]);
                     keysAggDist.push_back(keysAggUm[colUm]);
                     scaleAggDist.push_back(scaleAggUm[colUm]);
                     precisionAggDist.push_back(precisionAggUm[colUm]);
                     typeAggDist.push_back(typeAggUm[colUm]);
                     widthAggDist.push_back(widthAggUm[colUm]);
-                    colUm -= multiParms;
                 }
 
                 // not a direct hit -- a returned column is not already in the RG from PMs
@@ -4542,7 +4543,7 @@ void TupleAggregateStep::prep2PhasesDistinctAggregate(
                             // false alarm
                             returnColMissing = false;
 
-                            colUm = it->second - multiParms;
+                            colUm = it->second;
 
                             if (aggOp == ROWAGG_SUM)
                             {
diff --git a/oam/install_scripts/post-mysql-install b/oam/install_scripts/post-mysql-install
index 24711b048..421d5b77f 100755
--- a/oam/install_scripts/post-mysql-install
+++ b/oam/install_scripts/post-mysql-install
@@ -72,9 +72,11 @@ fi
 if [ -f $installdir/lib/libcalmysql.so.1.0.0 ]; then
 	libcalmysql=$installdir/lib/libcalmysql.so.1.0.0
 	libudfsdk=$installdir/lib/libudf_mysql.so.1.0.0
+	libregrsdk=$installdir/lib/libregr_mysql.so.1.0.0
 elif [ -f $installdir/lib/libcalmysql.so.1 ]; then
 	libcalmysql=$installdir/lib/libcalmysql.so.1
 	libudfsdk=$installdir/lib/libudf_mysql.so.1
+	libregrsdk=$installdir/lib/libregr_mysql.so.1
 else
 	libcalmysql=
 fi
@@ -84,6 +86,7 @@ if [ -d $installdir/mysql/lib64/mysql/plugin -a -n "$libcalmysql" ]; then
 	ln -sf $libcalmysql libcalmysql.so
         ln -sf $libcalmysql libcalmysqlent.so
 	ln -sf $libudfsdk libudf_mysql.so
+	ln -sf $libregrsdk libregr_mysql.so
 fi
 
 if [ $installdir != "/usr/local/mariadb/columnstore" ]; then
diff --git a/oam/install_scripts/post-mysqld-install b/oam/install_scripts/post-mysqld-install
index 58f2b3d65..e712b2813 100755
--- a/oam/install_scripts/post-mysqld-install
+++ b/oam/install_scripts/post-mysqld-install
@@ -83,6 +83,7 @@ chown -R $user.$user $installdir/mysql
 if [ -f $installdir/lib/libcalmysql.so.1.0.0 ]; then
 	libcalmysql=$installdir/lib/libcalmysql.so.1.0.0
 	libudfsdk=$installdir/lib/libudf_mysql.so.1.0.0
+	libregrsdk=$installdir/lib/libregr_mysql.so.1.0.0
     is_columnstore_tables=$installdir/lib/is_columnstore_tables.so.1.0.0
     is_columnstore_columns=$installdir/lib/is_columnstore_columns.so.1.0.0
     is_columnstore_extents=$installdir/lib/is_columnstore_extents.so.1.0.0
@@ -90,6 +91,7 @@ if [ -f $installdir/lib/libcalmysql.so.1.0.0 ]; then
 elif [ -f $installdir/lib/libcalmysql.so.1 ]; then
 	libcalmysql=$installdir/lib/libcalmysql.so.1
 	libudfsdk=$installdir/lib/libudf_mysql.so.1
+	libregrsdk=$installdir/lib/libregr_mysql.so.1
     is_columnstore_tables=$installdir/lib/is_columnstore_tables.so.1
     is_columnstore_columns=$installdir/lib/is_columnstore_columns.so.1
     is_columnstore_extents=$installdir/lib/is_columnstore_extents.so.1
@@ -104,6 +106,7 @@ if [ -n "$libcalmysql" ]; then
 	ln -sf $libcalmysql libcalmysql.so
     ln -sf $libcalmysql libcalmysqlent.so
 	ln -sf $libudfsdk libudf_mysql.so
+	ln -sf $libregrsdk libregr_mysql.so
     ln -sf $is_columnstore_tables is_columnstore_tables.so
     ln -sf $is_columnstore_columns is_columnstore_columns.so
     ln -sf $is_columnstore_extents is_columnstore_extents.so