Array ( [err] => Array ( [error] => ERROR: invalid input syntax for uuid: "" LINE 1: ...ct distinct id_smt from kelas_kuliah where id_sms='' and id_... ^ [no] => -1 ) [sql] => select distinct id_smt from kelas_kuliah where id_sms='' and id_mk='2f19e234-656d-39f0-81aa-72cbc214b725' ORDER BY id_smt DESC )