From b6959eee38b769da1cba93767aa76207c27ad090 Mon Sep 17 00:00:00 2001
From: Robert Haas <rhaas@postgresql.org>
Date: Thu, 6 Oct 2011 12:08:59 -0400
Subject: [PATCH] Make pgstatindex respond to cancel interrupts.

A similar problem for pgstattuple() was fixed in April of 2010 by commit
33065ef8bc52253ae855bc959576e52d8a28ba06, but pgstatindex() seems to have
been overlooked.

Back-patch all the way, as with that commit, though not to 7.4 through
8.1, since those are now EOL.
---
 contrib/pgstattuple/pgstatindex.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/contrib/pgstattuple/pgstatindex.c b/contrib/pgstattuple/pgstatindex.c
index 509e31f1a8..80a6793d23 100644
--- a/contrib/pgstattuple/pgstatindex.c
+++ b/contrib/pgstattuple/pgstatindex.c
@@ -299,6 +299,8 @@ pgstatindex(PG_FUNCTION_ARGS)
 		Buffer		buffer = ReadBuffer(rel, blkno);
 		BTPageStat	stat;
 
+		CHECK_FOR_INTERRUPTS();
+
 		/* scan one page */
 		stat.blkno = blkno;
 		GetBTPageStatistics(blkno, buffer, &stat);