pgmq don't manipulate sequences (#1471)

The script being deleted was a hacky solution we put in place to resolve a pg_dump segfault due to its interaction with pgmq tables. It currently introduces errors where sequences become owned by supabase_admin and are inaccessible to users after upgrading.
https://supabase.slack.com/archives/C05Q0CVC65B/p1741093731995359


This update mirrors the same code's removal from our on-backup hook here: https://github.com/supabase/infrastructure/pull/21405/files

Co-authored-by: Bobbie Soedirgo <[email protected]>

Author: olirice

ansible/files/admin_api_scripts/pg_upgrade_scripts/complete.sh

@@ -148,73 +148,6 @@ EOF
     # Patching pgmq ownership as it resets during upgrade
     HAS_PGMQ=$(run_sql -A -t -c "select count(*) > 0 from pg_extension where extname = 'pgmq';")
     if [ "$HAS_PGMQ" = "t" ]; then
-        PATCH_PGMQ_QUERY=$(cat <<EOF
-        do \$\$
-        declare
-            tbl record;
-            seq_name text;
-            new_seq_name text;
-            archive_table_name text;
-        begin
-            -- Loop through each table in the pgmq schema starting with 'q_'
-            -- Rebuild the pkey column's default to avoid pg_dumpall segfaults
-            for tbl in
-                select c.relname as table_name
-                from pg_catalog.pg_attribute a
-                join pg_catalog.pg_class c on c.oid = a.attrelid
-                join pg_catalog.pg_namespace n on n.oid = c.relnamespace
-                where n.nspname = 'pgmq'
-                    and c.relname like 'q_%'
-                    and a.attname = 'msg_id'
-                    and a.attidentity in ('a', 'd') -- 'a' for ALWAYS, 'd' for BY DEFAULT
-            loop
-                -- Check if msg_id is an IDENTITY column for idempotency
-                -- Define sequence names
-                seq_name := 'pgmq.' || format ('"%s_msg_id_seq"', tbl.table_name);
-                new_seq_name := 'pgmq.' || format ('"%s_msg_id_seq2"', tbl.table_name);
-                archive_table_name := regexp_replace(tbl.table_name, '^q_', 'a_');
-                -- Execute dynamic SQL to perform the required operations
-                execute format('
-                    create sequence %s;
-                    select setval(''%s'', nextval(''%s''));
-                    alter table %s."%s" alter column msg_id drop identity;
-                    alter table %s."%s" alter column msg_id set default nextval(''%s'');
-                    alter sequence %s rename to "%s";',
-                    -- Parameters for format placeholders
-                    new_seq_name,
-                    new_seq_name, seq_name,
-                    'pgmq', tbl.table_name,
-                    'pgmq', tbl.table_name,
-                    new_seq_name,
-                    -- alter seq
-                    new_seq_name, 
-                    tbl.table_name || '_msg_id_seq'
-                );
-            end loop;
-            -- No tables should be owned by the extension.
-            -- We want them to be included in logical backups
-            for tbl in
-                select c.relname as table_name
-                from pg_class c
-                join pg_depend d
-                    on c.oid = d.objid
-                join pg_extension e
-                    on d.refobjid = e.oid
-                where 
-                c.relkind in ('r', 'p', 'u')
-                and e.extname = 'pgmq'
-                and (c.relname like 'q_%' or c.relname like 'a_%')
-            loop
-            execute format('
-                alter extension pgmq drop table pgmq."%s";',
-                tbl.table_name
-            );
-            end loop;
-        end \$\$;
-EOF
-        )
-
-        run_sql -c "$PATCH_PGMQ_QUERY"
         run_sql -c "update pg_extension set extowner = 'postgres'::regrole where extname = 'pgmq';"
     fi