From 54ed8c93b392aeb8a86b7612853554d46948f3d0 Mon Sep 17 00:00:00 2001
From: Michael Paquier <michael@paquier.xyz>
Date: Wed, 13 Aug 2025 20:00:30 +0900
Subject: [PATCH v5 09/15] Add catcache support for OID8OID

This is required to be able to do catalog cache lookups of oid8 fields
for toast values of the same type.
---
 src/backend/utils/cache/catcache.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/backend/utils/cache/catcache.c b/src/backend/utils/cache/catcache.c
index e2cd3feaf81d..fee2e67c7830 100644
--- a/src/backend/utils/cache/catcache.c
+++ b/src/backend/utils/cache/catcache.c
@@ -240,6 +240,18 @@ int4hashfast(Datum datum)
 	return murmurhash32((int32) DatumGetInt32(datum));
 }
 
+static bool
+oid8eqfast(Datum a, Datum b)
+{
+	return DatumGetObjectId8(a) == DatumGetObjectId8(b);
+}
+
+static uint32
+oid8hashfast(Datum datum)
+{
+	return murmurhash64(DatumGetObjectId8(datum));
+}
+
 static bool
 texteqfast(Datum a, Datum b)
 {
@@ -300,6 +312,11 @@ GetCCHashEqFuncs(Oid keytype, CCHashFN *hashfunc, RegProcedure *eqfunc, CCFastEq
 			*fasteqfunc = int4eqfast;
 			*eqfunc = F_INT4EQ;
 			break;
+		case OID8OID:
+			*hashfunc = oid8hashfast;
+			*fasteqfunc = oid8eqfast;
+			*eqfunc = F_OID8EQ;
+			break;
 		case TEXTOID:
 			*hashfunc = texthashfast;
 			*fasteqfunc = texteqfast;
-- 
2.50.0