function DeleteTruncateTest::testSubselectDelete

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

File

core/tests/Drupal/KernelTests/Core/Database/DeleteTruncateTest.php, line 27

Class

DeleteTruncateTest

Tests delete and truncate queries.

Namespace

Code

public function testSubselectDelete() : void {
  $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->assertEquals(1, $num_deleted, 'Deleted 1 record.');
  $num_records_after = $this->connection
    ->query('SELECT COUNT(*) FROM {test_task}')
    ->fetchField();
  $this->assertEquals($num_records_before, $num_records_after + $num_deleted, 'Deletion adds up.');
}