change schema postgres code example

Example 1: postgres change the name of schema

ALTER SCHEMA old_name RENAME TO new_name;

Example 2: change schema of all tables postgres

DO
$$DECLARE
   p_table regclass;
BEGIN
   SET LOCAL search_path='xyz';
   FOR p_table IN
      SELECT oid FROM pg_class
      WHERE relnamespace = 'xyz'::regnamespace
        AND relkind = 'r'
   LOOP
      EXECUTE format('ALTER TABLE %s SET SCHEMA public', p_table);
   END LOOP;
END;$$;

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