diff --git a/contrib/pgstattuple/pgstatindex.c b/contrib/pgstattuple/pgstatindex.c
index 97f897e..4499f29 100644
--- a/contrib/pgstattuple/pgstatindex.c
+++ b/contrib/pgstattuple/pgstatindex.c
@@ -41,10 +41,12 @@
 
 extern Datum pgstatindex(PG_FUNCTION_ARGS);
 extern Datum pg_relpages(PG_FUNCTION_ARGS);
+extern Datum pg_relpages_regclass(PG_FUNCTION_ARGS);
 extern Datum pgstatginindex(PG_FUNCTION_ARGS);
 
 PG_FUNCTION_INFO_V1(pgstatindex);
 PG_FUNCTION_INFO_V1(pg_relpages);
+PG_FUNCTION_INFO_V1(pg_relpages_regclass);
 PG_FUNCTION_INFO_V1(pgstatginindex);
 
 #define IS_INDEX(r) ((r)->rd_rel->relkind == RELKIND_INDEX)
@@ -311,6 +313,29 @@ pg_relpages(PG_FUNCTION_ARGS)
 	PG_RETURN_INT64(relpages);
 }
 
+Datum
+pg_relpages_regclass(PG_FUNCTION_ARGS)
+{
+	Oid			relid = PG_GETARG_OID(0);
+	int64		relpages;
+	Relation	rel;
+
+	if (!superuser())
+		ereport(ERROR,
+				(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
+				 (errmsg("must be superuser to use pgstattuple functions"))));
+
+	rel = relation_open(relid, AccessShareLock);
+
+	/* note: this will work OK on non-local temp tables */
+
+	relpages = RelationGetNumberOfBlocks(rel);
+
+	relation_close(rel, AccessShareLock);
+
+	PG_RETURN_INT64(relpages);
+}
+
 /* ------------------------------------------------------
  * pgstatginindex()
  *
diff --git a/contrib/pgstattuple/pgstattuple--1.1.sql b/contrib/pgstattuple/pgstattuple--1.1.sql
index b21fbf8..21f467b 100644
--- a/contrib/pgstattuple/pgstattuple--1.1.sql
+++ b/contrib/pgstattuple/pgstattuple--1.1.sql
@@ -48,6 +48,11 @@ RETURNS BIGINT
 AS 'MODULE_PATHNAME', 'pg_relpages'
 LANGUAGE C STRICT;
 
+CREATE FUNCTION pg_relpages(IN relname regclass)
+RETURNS BIGINT
+AS 'MODULE_PATHNAME', 'pg_relpages_regclass'
+LANGUAGE C STRICT;
+
 /* New stuff in 1.1 begins here */
 
 CREATE FUNCTION pgstatginindex(IN relname regclass,