Partial fix for select distinct in subselect.

diff --git a/src/backend/nodes/copyfuncs.c b/src/backend/nodes/copyfuncs.c
index 344b409519008a2638e5e29786fb4d28f3a3059a..991965436aedf46b75ee32976059eba5a620ab09 100644 (file)
--- a/src/backend/nodes/copyfuncs.c
+++ b/src/backend/nodes/copyfuncs.c
@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *   $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.39 1998/02/21 06:31:40 scrappy Exp $
+ *   $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.40 1998/02/23 02:54:11 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -549,7 +549,10 @@ _copyUnique(Unique *from)
     *  copy remainder of node
     * ----------------
     */
-   newnode->uniqueAttr = pstrdup(from->uniqueAttr);
+   if (newnode->uniqueAttr)
+       newnode->uniqueAttr = pstrdup(from->uniqueAttr);
+   else
+       newnode->uniqueAttr = NULL;
    newnode->uniqueAttrNum = from->uniqueAttrNum;
    Node_Copy(from, newnode, uniquestate);