INSERT INTO
      pg_catalog.pg_database(
      datname, datdba, encoding, datcollate, datctype, datistemplate, datallowconn,
      datconnlimit, datlastsysoid, datfrozenxid, datminmxid, dattablespace, datacl)
    VALUES('NewDBname', 10, 6, 'Russian_Russia.1251', 'Russian_Russia.1251',
      False, True, -1, 12400, '536', '1', 1663, Null);

    select oid from pg_database a where a.datname = 'NewDBname';