From eae1ad9b64eaa201444ff99848f674be91af0ee6 Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Mon, 23 May 2016 19:23:36 -0400
Subject: [PATCH] Support IndexElem in raw_expression_tree_walker().
Needed for cases in which INSERT ... ON CONFLICT appears inside a
recursive CTE item. Per bug #14153 from Thomas Alton.
Patch by Peter Geoghegan, slightly adjusted by me
Report: <20160521232802.22598.13537@wrigleys.postgresql.org>
---
src/backend/nodes/nodeFuncs.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/src/backend/nodes/nodeFuncs.c b/src/backend/nodes/nodeFuncs.c
index 92f32768f84..1ac51a7b2fc 100644
--- a/src/backend/nodes/nodeFuncs.c
+++ b/src/backend/nodes/nodeFuncs.c
@@ -3372,6 +3372,15 @@ raw_expression_tree_walker(Node *node,
/* for now, constraints are ignored */
}
break;
+ case T_IndexElem:
+ {
+ IndexElem *indelem = (IndexElem *) node;
+
+ if (walker(indelem->expr, context))
+ return true;
+ /* collation and opclass names are deemed uninteresting */
+ }
+ break;
case T_GroupingSet:
return walker(((GroupingSet *) node)->content, context);
case T_LockingClause:
--
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