Ooops ... 6.5 coding wasn't quite right anymore. Should learn

never to commit without running regress tests...

src/backend/executor/nodeAgg.c

@@ -11,7 +11,7 @@
  *	  SQL aggregates. (Do not expect POSTQUEL semantics.)	 -- ay 2/95
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/executor/nodeAgg.c,v 1.58 1999/10/30 01:18:16 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/executor/nodeAgg.c,v 1.59 1999/10/30 02:35:14 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -434,6 +434,9 @@ ExecAgg(Agg *node)
 
 				tupType = aggstate->csstate.css_ScanTupleSlot->ttc_tupleDescriptor;
 				tupValue = projInfo->pi_tupValue;
+				/* watch out for null input tuples, though... */
+				if (tupType && tupValue)
+				{
 					null_array = (char *) palloc(sizeof(char)*tupType->natts);
 					for (attnum = 0; attnum < tupType->natts; attnum++)
 						null_array[attnum] = 'n';
@@ -441,6 +444,7 @@ ExecAgg(Agg *node)
 					pfree(null_array);
 				}
 			}
+		}
 
 		/*
 		 * Store the representative input tuple in the tuple table slot