I overlooked the fact even in the bitmap index scan loose mode,  the recheck
is still executed  before the qual, so bitmap index scan is OK in this case.

 Sort
   Output: oid, relname
   Sort Key: pg_class.relname
   ->  Bitmap Heap Scan on pg_catalog.pg_class
         Output: oid, relname
         Recheck Cond: (pg_class.relnamespace = '28601'::oid)
         Filter: (has_table_privilege(pg_class.oid, 'SELECT'::text) AND
(pg_class.relkind = ANY ('{r,m,v}'::"char"[])))
         ->  Bitmap Index Scan on pg_class_relname_nsp_index
               Index Cond: (pg_class.relnamespace = '28601'::oid)

v2 attached.

-- 
Best Regards
Andy Fan

Attachment: v2-0001-Avoid-a-potential-unstable-testcase.patch
Description: Binary data

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