From dd9af92c413827404e87d479a48c5eb696857423 Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Sat, 18 May 2002 21:38:41 +0000
Subject: Add display of sort keys to the default EXPLAIN output.

---
 src/backend/utils/adt/ruleutils.c | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

(limited to 'src/backend/utils/adt/ruleutils.c')

diff --git a/src/backend/utils/adt/ruleutils.c b/src/backend/utils/adt/ruleutils.c
index 88528b9a065..738efdb7442 100644
--- a/src/backend/utils/adt/ruleutils.c
+++ b/src/backend/utils/adt/ruleutils.c
@@ -3,7 +3,7 @@
  *				back to source text
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.105 2002/05/17 01:19:18 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.106 2002/05/18 21:38:40 tgl Exp $
  *
  *	  This software is copyrighted by Jan Wieck - Hamburg.
  *
@@ -779,6 +779,27 @@ deparse_context_for_subplan(const char *name, List *tlist,
 	return (Node *) rte;
 }
 
+/*
+ * deparse_context_from_rtable	- Build deparse context given a rangetable
+ *
+ * This is suitable for deparsing expressions that refer to only a single
+ * level of variables (no outer-reference Vars).
+ */
+List *
+deparse_context_from_rtable(List *rtable)
+{
+	deparse_namespace *dpns;
+
+	dpns = (deparse_namespace *) palloc(sizeof(deparse_namespace));
+
+	dpns->rtable = rtable;
+	dpns->outer_varno = dpns->inner_varno = 0;
+	dpns->outer_rte = dpns->inner_rte = NULL;
+
+	/* Return a one-deep namespace stack */
+	return makeList1(dpns);
+}
+
 /* ----------
  * make_ruledef			- reconstruct the CREATE RULE command
  *				  for a given pg_rewrite tuple
-- 
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