1 files changed, 7 insertions, 0 deletions
diff --git a/sql/sql_parse.cc b/sql/sql_parse.cc
index f73ddf920bf..f891d307e9b 100644
--- a/sql/sql_parse.cc
+++ b/sql/sql_parse.cc
@@ -2697,6 +2697,9 @@ mysql_execute_command(THD *thd)
             }
           }
         }
+        if (mysql_handle_single_derived(thd->lex, create_table,
+            DT_MERGE_FOR_INSERT))
+          DBUG_RETURN(1);
 
         /* So that CREATE TEMPORARY TABLE gets to binlog at commit/rollback */
         if (create_info.options & HA_LEX_CREATE_TMP_TABLE)
@@ -3223,6 +3226,10 @@ end_with_restore_list:
 
     if (!(res= open_and_lock_tables(thd, all_tables)))
     {
+      /*
+        Only the INSERT table should be merged. Other will be handled by
+        select.
+      */
       /* Skip first table, which is the table we are inserting in */
       TABLE_LIST *second_table= first_table->next_local;
       select_lex->table_list.first= second_table;