fix-pg_publication_tables-performance.patch

diff --git a/src/backend/catalog/system_views.sql b/src/backend/catalog/system_views.sql
index 566100d..52a6c31 100644
--- a/src/backend/catalog/system_views.sql
+++ b/src/backend/catalog/system_views.sql
@@ -258,9 +258,10 @@ CREATE VIEW pg_publication_tables AS
         P.pubname AS pubname,
         N.nspname AS schemaname,
         C.relname AS tablename
-    FROM pg_publication P, pg_class C
-         JOIN pg_namespace N ON (N.oid = C.relnamespace)
-    WHERE C.oid IN (SELECT relid FROM pg_get_publication_tables(P.pubname));
+    FROM pg_publication P,
+         LATERAL pg_get_publication_tables(P.pubname) GPT,
+         pg_class C JOIN pg_namespace N ON (N.oid = C.relnamespace)
+    WHERE C.oid = GPT.relid;
 
 CREATE VIEW pg_locks AS
     SELECT * FROM pg_lock_status() AS L;
diff --git a/src/test/regress/expected/rules.out b/src/test/regress/expected/rules.out
index 0c392e5..4363ca1 100644
--- a/src/test/regress/expected/rules.out
+++ b/src/test/regress/expected/rules.out
@@ -1441,10 +1441,10 @@ pg_publication_tables| SELECT p.pubname,
     n.nspname AS schemaname,
     c.relname AS tablename
    FROM pg_publication p,
+    LATERAL pg_get_publication_tables((p.pubname)::text) gpt(relid),
     (pg_class c
      JOIN pg_namespace n ON ((n.oid = c.relnamespace)))
-  WHERE (c.oid IN ( SELECT pg_get_publication_tables.relid
-           FROM pg_get_publication_tables((p.pubname)::text) pg_get_publication_tables(relid)));
+  WHERE (c.oid = gpt.relid);
 pg_replication_origin_status| SELECT pg_show_replication_origin_status.local_id,
     pg_show_replication_origin_status.external_id,
     pg_show_replication_origin_status.remote_lsn,