db_owner.sql

DO $$
DECLARE sch RECORD;
DECLARE tbl RECORD;
DECLARE seq RECORD;
DECLARE func RECORD;
DECLARE proc RECORD;

BEGIN
  EXECUTE format('ALTER DATABASE %I OWNER TO %I', 'dbName', 'user');
  
  FOR sch IN
    SELECT nspname FROM pg_catalog.pg_namespace where nspname NOT IN ('pg_toast', 'pg_catalog', 'information_schema')
  LOOP
    EXECUTE format('ALTER SCHEMA %I OWNER TO %I', sch.nspname, 'user');
  
    FOR tbl IN 
      SELECT table_name FROM information_schema.tables WHERE table_schema = sch.nspname
      UNION 
      SELECT table_name FROM information_schema.views WHERE table_schema = sch.nspname
    LOOP
      EXECUTE format('ALTER TABLE %I.%I OWNER TO %I', sch.nspname, tbl.table_name, 'user');
    END LOOP;
  
    FOR seq IN 
      SELECT sequence_name FROM information_schema.sequences WHERE sequence_schema = sch.nspname
    LOOP
      EXECUTE format('ALTER SEQUENCE %I.%I OWNER TO %I', sch.nspname, seq.sequence_name, 'user');
    END LOOP;
  
    FOR func IN 
      SELECT p.oid::regprocedure AS func_name FROM pg_catalog.pg_proc p JOIN pg_catalog.pg_namespace n ON n.oid = p.pronamespace WHERE n.nspname = sch.nspname and p.prokind = 'f'
    LOOP
      EXECUTE format('ALTER FUNCTION %s OWNER TO %I', func.func_name, 'user');
    END LOOP;
  
    FOR proc IN 
      SELECT p.oid::regprocedure AS pro_name FROM pg_catalog.pg_proc p JOIN pg_catalog.pg_namespace n ON n.oid = p.pronamespace WHERE n.nspname = sch.nspname and p.prokind = 'p'
    LOOP
      EXECUTE format('ALTER PROCEDURE %s OWNER TO %I', proc.pro_name, 'user');
    END LOOP;
  END LOOP;
END $$