function SelectSubqueryTest::testNotExistsSubquerySelect

Tests NOT EXISTS subquery conditionals on SELECT statements.

We essentially select all rows from the {test} table that don't have matching rows in the {test_people} table based on the shared name column.

File

core/tests/Drupal/KernelTests/Core/Database/SelectSubqueryTest.php, line 250

Class

SelectSubqueryTest

Tests the Select query builder.

Namespace

Code

public function testNotExistsSubquerySelect() : void {
    // Put George into {test_people}.
    $this->connection
        ->insert('test_people')
        ->fields([
        'name' => 'George',
        'age' => 27,
        'job' => 'Singer',
    ])
        ->execute();
    // Base query to {test}.
    $query = $this->connection
        ->select('test', 't')
        ->fields('t', [
        'name',
    ]);
    // Subquery to {test_people}.
    $subquery = $this->connection
        ->select('test_people', 'tp')
        ->fields('tp', [
        'name',
    ])
        ->where('[tp].[age] = [t].[age]');
    $query->notExists($subquery);
    // Ensure that we got the right number of records.
    $people = $query->execute()
        ->fetchCol();
    $this->assertCount(3, $people, 'NOT EXISTS query returned the correct results.');
}