-- -- util__get_primary_keys/1 -- create or replace function util__get_primary_keys( text ) returns name as $$ SELECT a.attname FROM pg_index i JOIN pg_attribute a ON a.attrelid = i.indrelid AND a.attnum = ANY(i.indkey) WHERE i.indrelid = $1::regclass AND i.indisprimary; $$ language plpgsql;