function DeleteTruncateTest::testSubselectDelete

Confirms that we can use a subselect in a delete successfully.

File

core/tests/Drupal/KernelTests/Core/Database/DeleteTruncateTest.php, line 23

Class

DeleteTruncateTest

Tests delete and truncate queries.

Namespace

Code

public function testSubselectDelete() {
    $num_records_before = $this->connection
        ->query('SELECT COUNT(*) FROM {test_task}')
        ->fetchField();
    $pid_to_delete = $this->connection
        ->query("SELECT * FROM {test_task} WHERE task = 'sleep' ORDER BY tid")
        ->fetchField();
    $subquery = $this->connection
        ->select('test', 't')
        ->fields('t', [
        'id',
    ])
        ->condition('t.id', [
        $pid_to_delete,
    ], 'IN');
    $delete = $this->connection
        ->delete('test_task')
        ->condition('task', 'sleep')
        ->condition('pid', $subquery, 'IN');
    $num_deleted = $delete->execute();
    $this->assertEqual($num_deleted, 1, 'Deleted 1 record.');
    $num_records_after = $this->connection
        ->query('SELECT COUNT(*) FROM {test_task}')
        ->fetchField();
    $this->assertEqual($num_records_before, $num_records_after + $num_deleted, 'Deletion adds up.');
}