feat: add PG.OID type cod annotation

Google APIs · copybara-github · commit 727c286eca5a · 2023-10-26T19:24:09.000-07:00
PiperOrigin-RevId: 577053414
diff --git a/google/spanner/v1/type.proto b/google/spanner/v1/type.proto
@@ -1,4 +1,4 @@
-// Copyright 2022 Google LLC
+// Copyright 2023 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -171,4 +171,9 @@ enum TypeAnnotationCode {
   // [JSON][google.spanner.v1.TypeCode.JSON] when a client interacts with PostgreSQL-enabled
   // Spanner databases.
   PG_JSONB = 3;
+
+  // PostgreSQL compatible OID type. This annotation can be used by a client
+  // interacting with PostgreSQL-enabled Spanner database to specify that a
+  // value should be treated using the semantics of the OID type.
+  PG_OID = 4;
 }
