Query Builder

Build database queries with filters, joins, aggregates, subqueries, and reusable Criteria objects.

Basic usage

$qb = $entityManager->createQueryBuilder(User::class);

$users = $qb
    ->select('*')
    ->where('status', 'active')
    ->orderBy('created_at', 'DESC')
    ->limit(10)
    ->getResult();

Where clauses

where($field, $value) for equality.
whereIn($field, $values) for IN (...).
whereNull($field) and whereNotNull($field) for null checks.
whereExists($callback) for subqueries.
whereRaw($sql, ...$params) for escape-hatch SQL with bound parameters.

Joins and aggregates

Use join, leftJoin, rightJoin, and crossJoin for table joins. Use count, sum, avg, max, and min for aggregate selects.

Criteria

Implement CriteriaInterface when a filter should be reusable across repositories or commands, then apply it to a builder.

$orders = $this->entityManager
    ->createQueryBuilder(Order::class)
    ->whereNull('shipped_at')
    ->orderBy('placed_at', 'DESC')
    ->getResult();

Use whereRaw() only with bound parameters:

$qb->whereRaw('total > ?', [100]);

Batch reads

For large result sets, prefer bounded batches and clear the EntityManager between batches so the identity map does not grow without limit. See Performance for memory behavior.

chunk($size) wraps this in a generator that handles the limit/offset loop for you:

foreach ($qb->chunk(100) as $batch) {
    foreach ($batch as $row) {
        // process $row
    }

    $entityManager->clear();
}