function Select::union

Same name and namespace in other branches
  1. 11.x core/lib/Drupal/Core/Database/Query/Select.php \Drupal\Core\Database\Query\Select::union()
  2. 10 core/lib/Drupal/Core/Database/Query/Select.php \Drupal\Core\Database\Query\Select::union()
  3. 8.9.x core/lib/Drupal/Core/Database/Query/Select.php \Drupal\Core\Database\Query\Select::union()

File

core/lib/Drupal/Core/Database/Query/Select.php, line 695

Class

Select
Query builder for SELECT statements.

Namespace

Drupal\Core\Database\Query

Code

public function union(SelectInterface $query, $type = '') {
  // Handle UNION aliasing.
  switch ($type) {
    // Fold UNION DISTINCT to UNION for better cross database support.
    case 'DISTINCT':
    case '':
      $type = 'UNION';
      break;

    case 'ALL':
      $type = 'UNION ALL';
    default:
  }
  $this->union[] = [
    'type' => $type,
    'query' => $query,
  ];
  return $this;
}

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