Question

如果不返回任何数据，我想获取查询中选择的列

 $sql = $this->em->getConnection()->prepare('
                SELECT
                    DATE_FORMAT(cus.period, "%Y") as ANNEE,
                    DATE_FORMAT(cus.period, "%m") as MOIS,
                    c.name AS PAYS,
                    co.id AS ORIGINE_ID,
                    co.name AS ORIGINE,
                FROM customs AS cus
                WHERE cp.product in (503)
                GROUP BY ANNEE, MOIS, PRODUCT, co.id , c.id
                ORDER BY ANNEE, MOIS, CAMPAGNE, PRODUCT, co.id, c.name;'
        );
$sql->execute();
$result = $sql->fetchAll();

我没有数据，结果是一个空数组，但是我想要万一没有数据结果应该是一个像这样的数组

$result = [ 'ANNEE', 'MOIS', 'PAYS', 'ORIGINE_ID', 'ORIGINE' ]

Answer 1

Doctrine中的

getConnection()返回包装的PDO，这意味着我们可以使用getColumnMeta()获取列名：

$stmt = $sql->execute();
$columnNames = array();

foreach(range(0, $stmt->columnCount() - 1) as $index) {
    $columnNames[] = $stmt->getColumnMeta($index)['name'];
}

然后可以将

$columnNames添加到您的$result

如果查询中没有数据，则获取列

1 个答案: