Oracle通过自建函数校验条码13位是否正确

Question

请问如何在条件语句里调用函数呢

where pdd.barcode like '_____________'
and substr('d.barcode',13,1) = (select dbo.ean13('d.barcode') from directory d)

Answer 1

dbo.ean13(d.barcode) ，传参不需要引号