ZF2 更改我的表达式并返回错误（Postgre，Distinct）

Question

我必须创建一个 SELECT，我将在其中按列 idcontrato 区分行。我用 SQL...

做得很好

SELECT DISTINCT ON (idcontrato) * 
FROM   cad_emprestimo 
WHERE  numerobeneficio = '1135346515';

但是当我尝试对 ZF2 执行相同操作时：

$emprestimos = (new EmprestimoTable())->select(function(Select $select) use($cliente) {
        $select->columns([new Expression('DISTINCT ON (idcontrato) *')]);
        $select->where->equalTo('numerobeneficio', $cliente->getBeneficio()->getNumero());
});

我收到以下错误：

SQLSTATE[42601]: Syntax error: 7 ERRO:  erro de sintaxe em ou próximo a "AS"
LINE 1: SELECT DISTINCT ON (idcontrato) * AS Expression1 FROM "cad_e...
                                          ^

这个'AS Expression1'由ZF2添加...我不知道如何删除它。

Answer 1

试试下面的代码

$emprestimos = (new EmprestimoTable())->select(function(Select $select) use($cliente) {
        $select->columns([new Expression('DISTINCT(idcontrato) AS idcontrato'), '*']);
        $select->where->equalTo('numerobeneficio', $cliente->getBeneficio()->getNumero());
});

Answer 2

我找到的明显解决方案是运行原始 SQL:

    $dbAdapter      = GlobalAdapterFeature::getStaticAdapter();
    $numBeneficio   = $cliente->getBeneficio()->getNumero();
    $sqlEmprestimos = "SELECT DISTINCT ON (idcontrato) * FROM cad_emprestimo WHERE numerobeneficio = '".$numBeneficio."'; ";
    $dataSource     = $dbAdapter->createStatement($sqlEmprestimos)->execute();
    $emprestimos    = (new \Zend\Db\ResultSet\ResultSet())->initialize($dataSource);

无论如何，我对此并不满意，这段代码丑得要命。

ZF2 更改我的表达式并返回错误（Postgre，Distinct）

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

php

sql

postgresql

zend-framework2