function SelectSubqueryTest::testExistsSubquerySelect

Tests EXISTS subquery conditionals on SELECT statements.

We essentially select all rows from the {test} table that have matching rows in the {test_people} table based on the shared name column.

File

core/tests/Drupal/KernelTests/Core/Database/SelectSubqueryTest.php, line 210

Class

SelectSubqueryTest

Tests the Select query builder.

Namespace

Code

public function testExistsSubquerySelect() {
    // 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.name = t.name');
    $query->exists($subquery);
    $result = $query->execute();
    // Ensure that we got the right record.
    $record = $result->fetch();
    $this->assertEquals('George', $record->name, 'Fetched name is correct using EXISTS query.');
}