From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Mon, 21 Apr 2003 15:20:02 +0000 (+0000)
Subject: Prevent palloc(0) error when parent table has zero columns.
X-Git-Tag: REL7_3_3~27
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=a72fd0d60ea527a225972c481c7dd02f75dac653;p=postgresql

Prevent palloc(0) error when parent table has zero columns.
---

diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c
index 46d9b70939..2823355faf 100644
--- a/src/backend/commands/tablecmds.c
+++ b/src/backend/commands/tablecmds.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/commands/tablecmds.c,v 1.51.2.1 2002/12/16 18:39:56 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/commands/tablecmds.c,v 1.51.2.2 2003/04/21 15:20:02 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -576,9 +576,10 @@ MergeAttributes(List *schema, List *supers, bool istemp,
 		 * newattno[] will contain the child-table attribute numbers for
 		 * the attributes of this parent table.  (They are not the same
 		 * for parents after the first one, nor if we have dropped
-		 * columns.)
+		 * columns.)  +1 is to prevent error if parent has zero columns.
 		 */
-		newattno = (AttrNumber *) palloc(tupleDesc->natts * sizeof(AttrNumber));
+		newattno = (AttrNumber *)
+			palloc((tupleDesc->natts + 1) * sizeof(AttrNumber));
 
 		for (parent_attno = 1; parent_attno <= tupleDesc->natts;
 			 parent_attno++)