Shouldn't try to copy null datums with datumCopy.

diff --git a/src/backend/optimizer/util/clauses.c b/src/backend/optimizer/util/clauses.c
index b3d50433564b8d20db1e2eccc256664aceab6611..8a4bcf4d9c450bf02c3c94bcc0b15d5075cdc360 100644 (file)
--- a/src/backend/optimizer/util/clauses.c
+++ b/src/backend/optimizer/util/clauses.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *   $Header: /cvsroot/pgsql/src/backend/optimizer/util/clauses.c,v 1.92 2001/12/10 22:54:12 tgl Exp $
+ *   $Header: /cvsroot/pgsql/src/backend/optimizer/util/clauses.c,v 1.93 2002/01/03 18:01:59 tgl Exp $
  *
  * HISTORY
  *   AUTHOR            DATE            MAJOR EVENT
@@ -1544,7 +1544,8 @@ simplify_op_or_func(Expr *expr, List *args)
                                          &const_is_null, NULL);
 
    /* Must copy result out of sub-context used by expression eval */
-   const_val = datumCopy(const_val, resultTypByVal, resultTypLen);
+   if (!const_is_null)
+       const_val = datumCopy(const_val, resultTypByVal, resultTypLen);
 
    FreeExprContext(econtext);
    pfree(newexpr);