Add support for the CASE statement in the rewrite handling.

Allows (at least some) rules and views.
Still some trouble (crashes) with target CASE columns spanning tables,
 but lots now works.

1 files changed, 69 insertions, 1 deletions

diff --git a/src/backend/rewrite/rewriteManip.c b/src/backend/rewrite/rewriteManip.c
index 64da8479d1..9d6d5e7d64 100644
--- a/src/backend/rewrite/rewriteManip.c
+++ b/src/backend/rewrite/rewriteManip.c
@@ -6,7 +6,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteManip.c,v 1.22 1998/10/21 16:21:26 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteManip.c,v 1.23 1998/12/14 00:02:17 thomas Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -191,6 +191,38 @@ OffsetVarNodes(Node *node, int offset, int sublevels_up)
 			}
 			break;
 
+		case T_CaseExpr:
+			{
+				CaseExpr	*exp = (CaseExpr *)node;
+
+				OffsetVarNodes(
+						(Node *)(exp->args),
+						offset,
+						sublevels_up);
+
+				OffsetVarNodes(
+						(Node *)(exp->defresult),
+						offset,
+						sublevels_up);
+			}
+			break;
+
+		case T_CaseWhen:
+			{
+				CaseWhen	*exp = (CaseWhen *)node;
+
+				OffsetVarNodes(
+						(Node *)(exp->expr),
+						offset,
+						sublevels_up);
+
+				OffsetVarNodes(
+						(Node *)(exp->result),
+						offset,
+						sublevels_up);
+			}
+			break;
+
 		default:
 			elog(NOTICE, "unknown node tag %d in OffsetVarNodes()", nodeTag(node));
 			elog(NOTICE, "Node is: %s", nodeToString(node));
@@ -377,6 +409,42 @@ ChangeVarNodes(Node *node, int rt_index, int new_index, int sublevels_up)
 			}
 			break;
 
+		case T_CaseExpr:
+			{
+				CaseExpr	*exp = (CaseExpr *)node;
+
+				ChangeVarNodes(
+						(Node *)(exp->args),
+						rt_index,
+						new_index,
+						sublevels_up);
+
+				ChangeVarNodes(
+						(Node *)(exp->defresult),
+						rt_index,
+						new_index,
+						sublevels_up);
+			}
+			break;
+
+		case T_CaseWhen:
+			{
+				CaseWhen	*exp = (CaseWhen *)node;
+
+				ChangeVarNodes(
+						(Node *)(exp->expr),
+						rt_index,
+						new_index,
+						sublevels_up);
+
+				ChangeVarNodes(
+						(Node *)(exp->result),
+						rt_index,
+						new_index,
+						sublevels_up);
+			}
+			break;
+
 		default:
 			elog(NOTICE, "unknown node tag %d in ChangeVarNodes()", nodeTag(node));
 			elog(NOTICE, "Node is: %s", nodeToString(node));