function SelectTest::testUnionAll

Tests that we can UNION ALL multiple SELECT queries together.

File

core/tests/Drupal/KernelTests/Core/Database/SelectTest.php, line 332

Class

SelectTest

Tests the Select query builder.

Namespace

Code

public function testUnionAll() : void {
    $query_1 = $this->connection
        ->select('test', 't')
        ->fields('t', [
        'name',
    ])
        ->condition('age', [
        27,
        28,
    ], 'IN');
    $query_2 = $this->connection
        ->select('test', 't')
        ->fields('t', [
        'name',
    ])
        ->condition('age', 28);
    $query_1->union($query_2, 'ALL');
    $names = $query_1->execute()
        ->fetchCol();
    // Ensure we get all 3 records.
    $this->assertCount(3, $names, 'UNION ALL correctly preserved duplicates.');
    $this->assertEquals('George', $names[0], 'First query returned correct first name.');
    $this->assertEquals('Ringo', $names[1], 'Second query returned correct second name.');
    $this->assertEquals('Ringo', $names[2], 'Third query returned correct name.');
}