From 8325a8d69eca29573e5e11f341636a1afe664f20 Mon Sep 17 00:00:00 2001
From: Tom Lane
Date: Thu, 6 May 2004 16:10:57 +0000
Subject: Make ALTER COLUMN TYPE preserve clustered status for indexes it
 doesn't modify.  Also fix a passel of problems with ALTER TABLE CLUSTER ON:
 failure to check that the index is safe to cluster on (or even belongs to the
 indicated rel, or even exists), and failure to broadcast a relcache flush
 event when changing an index's state.

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

(limited to 'src/backend/utils/cache/inval.c')

diff --git a/src/backend/utils/cache/inval.c b/src/backend/utils/cache/inval.c
index 3364322dd5b..7b00f0531e2 100644
--- a/src/backend/utils/cache/inval.c
+++ b/src/backend/utils/cache/inval.c
@@ -74,7 +74,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/cache/inval.c,v 1.60 2004/02/10 01:55:26 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/cache/inval.c,v 1.61 2004/05/06 16:10:57 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -88,6 +88,7 @@
 #include "utils/inval.h"
 #include "utils/memutils.h"
 #include "utils/relcache.h"
+#include "utils/syscache.h"
 
 
 /*
@@ -765,6 +766,26 @@ CacheInvalidateRelcacheByTuple(HeapTuple classTuple)
 	RegisterRelcacheInvalidation(databaseId, relationId, rnode);
 }
 
+/*
+ * CacheInvalidateRelcacheByRelid
+ *		As above, but relation is identified by passing its OID.
+ *		This is the least efficient of the three options; use one of
+ *		the above routines if you have a Relation or pg_class tuple.
+ */
+void
+CacheInvalidateRelcacheByRelid(Oid relid)
+{
+	HeapTuple	tup;
+
+	tup = SearchSysCache(RELOID,
+						 ObjectIdGetDatum(relid),
+						 0, 0, 0);
+	if (!HeapTupleIsValid(tup))
+		elog(ERROR, "cache lookup failed for relation %u", relid);
+	CacheInvalidateRelcacheByTuple(tup);
+	ReleaseSysCache(tup);
+}
+
 /*
  * CacheRegisterSyscacheCallback
  *		Register the specified function to be called for all future
-- 
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