php - ZF2 changing my expression and returning error (Postgre, Distinct) -


i have make select distinct rows column idcontrato. did with sql...

select distinct on (idcontrato) *    cad_emprestimo   numerobeneficio = '1135346515';

but when try same zf2:

$emprestimos = (new emprestimotable())->select(function(select $select) use($cliente) {         $select->columns([new expression('distinct on (idcontrato) *')]);         $select->where->equalto('numerobeneficio', $cliente->getbeneficio()->getnumero()); });

i got following error:

sqlstate[42601]: syntax error: 7 erro:  erro de sintaxe em ou próximo "as" line 1: select distinct on (idcontrato) * expression1 "cad_e...                                           ^

this 'as expression1' added zf2... don't know how remove it.

try below code

$emprestimos = (new emprestimotable())->select(function(select $select) use($cliente) {         $select->columns([new expression('distinct(idcontrato) idcontrato'), '*']);         $select->where->equalto('numerobeneficio', $cliente->getbeneficio()->getnumero()); });

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