From: Andres Freund <andres@anarazel.de>
Date: Thu, 14 Sep 2017 02:29:45 +0000 (-0700)
Subject: WIP: Improve getBaseTypeAndTypemod() performance for builtin types.
X-Git-Url: http://git.postgresql.org/gitweb/?a=commitdiff_plain;h=refs%2Fheads%2Fsimple_statement_perf;p=users%2Fandresfreund%2Fpostgres.git

WIP: Improve getBaseTypeAndTypemod() performance for builtin types.

Author: Robert Haas
Discussion: https://postgr.es/m/
---

diff --git a/src/backend/utils/cache/lsyscache.c b/src/backend/utils/cache/lsyscache.c
index b7a14dc87e..2a22da1489 100644
--- a/src/backend/utils/cache/lsyscache.c
+++ b/src/backend/utils/cache/lsyscache.c
@@ -2295,6 +2295,9 @@ getBaseTypeAndTypmod(Oid typid, int32 *typmod)
 		HeapTuple	tup;
 		Form_pg_type typTup;
 
+		if (typid < FirstBootstrapObjectId)
+			break;
+
 		tup = SearchSysCache1(TYPEOID, ObjectIdGetDatum(typid));
 		if (!HeapTupleIsValid(tup))
 			elog(ERROR, "cache lookup failed for type %u", typid);