Fix outfuncs.c to dump A_Const nodes representing NULLs correctly. This has

been broken since forever, but was not noticed because people seldom look
at raw parse trees.  AFAIK, no impact on users except that debug_print_parse
might fail; but patch it all the way back anyway.  Per report from Jeff Ross.

diff --git a/src/backend/nodes/outfuncs.c b/src/backend/nodes/outfuncs.c
index 97d9aed24078a3e6f69173b03a764069c4ccd3ed..c2cc9f2e0a14500cad7cb47b8b63848d53204cdd 100644 (file)
--- a/src/backend/nodes/outfuncs.c
+++ b/src/backend/nodes/outfuncs.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *       $Header: /cvsroot/pgsql/src/backend/nodes/outfuncs.c,v 1.218 2003/08/17 23:43:26 tgl Exp $
+ *       $Header: /cvsroot/pgsql/src/backend/nodes/outfuncs.c,v 1.218.2.1 2007/07/17 01:22:18 tgl Exp $
  *
  * NOTES
  *       Every node type that can appear in stored rules' parsetrees *must*
@@ -1407,6 +1407,10 @@ _outValue(StringInfo str, Value *value)
                        /* internal representation already has leading 'b' */
                        appendStringInfo(str, "%s", value->val.str);
                        break;
+               case T_Null:
+                       /* this is seen only within A_Const, not in transformed trees */
+                       appendStringInfoString(str, "NULL");
+                       break;
                default:
                        elog(ERROR, "unrecognized node type: %d", (int) value->type);
                        break;
@@ -1435,8 +1439,9 @@ _outParamRef(StringInfo str, ParamRef *node)
 static void
 _outAConst(StringInfo str, A_Const *node)
 {
-       WRITE_NODE_TYPE("CONST ");
+       WRITE_NODE_TYPE("A_CONST");
 
+       appendStringInfo(str, " :val ");
        _outValue(str, &(node->val));
        WRITE_NODE_FIELD(typename);
 }