diff --git a/dbcon/mysql/ha_mcs_execplan.cpp b/dbcon/mysql/ha_mcs_execplan.cpp
index 5b6118028..133c89d2d 100755
--- a/dbcon/mysql/ha_mcs_execplan.cpp
+++ b/dbcon/mysql/ha_mcs_execplan.cpp
@@ -4941,7 +4941,8 @@ ReturnedColumn* buildAggregateColumn(Item* item, gp_walk_info& gwi)
         {
             for (uint32_t i = 0; i < gwi.returnedCols.size(); i++)
             {
-                if (*ac == gwi.returnedCols[i].get())
+                if (*ac == gwi.returnedCols[i].get() 
+                        && ac->alias() == gwi.returnedCols[i].get()->alias())
                     ac->expressionId(gwi.returnedCols[i]->expressionId());
             }
         }