使用 Doctrine DBAL 从 SELECT 查询中计算行数

Question

OK so I am looking for a neat and short way to count the number of rows from a SELECT query using Doctrine DBAL.

I know that I could SELECT COUNT(*) but then I need to sort through the array when I fetch results. Alternatively, it's been suggested to look in to getScalarResult() . But I can't seem to find any documentation about this, other than in DQL (which is a different project).

So what is the neatest way to do this? I guess it's because I'm used to the great MySQLI attribute num_rows !

Answer 1

Another way to do this with Doctrine DBAL is to get the count as a field and return the column

    $sql = "SELECT count(*) AS Total FROM myTable WHERE myId = :myId";
    $stmt = $conn->prepare($sql);
    $stmt->bindValue('myId', $myId, PDO::PARAM_INT);
    $stmt->execute();
    $count = $stmt->fetchColumn(0);

Answer 2

Actually I thought I had looked really hard, but I just came across this Count Records Returned MySQL Doctrine

So the way to do it is via the rowCount() method.

Example:

$num_rows = $conn->executeQuery("SELECT * FROM users")->rowCount();

Answer 3

I enjoy to use the query builder. An example:

    $queryBuilder = $connection->createQueryBuilder();
    $queryBuilder->select('COUNT(*)');
    $queryBuilder->from("the_table");
    $queryBuilder->where('some_column = :theValue');
    $queryBuilder->setParameter('theValue', $someValue);

    return (int) $queryBuilder->execute()->fetchColumn();

Answer 4

Here is an updated version of @DonkeyKong answer for Doctrine DBAL >= 2.13 :

$sql = "SELECT count(*) AS Total FROM myTable WHERE myId = :myId";
$stmt = $conn->prepare($sql);
$stmt->bindValue('myId', $myId, PDO::PARAM_INT);
$result = $stmt->executeQuery();
$count = $result->fetchOne();