public function Select::extend in Drupal 8

Same name and namespace in other branches

1. 9 core/lib/Drupal/Core/Database/Query/Select.php \Drupal\Core\Database\Query\Select::extend()

Enhance this object by wrapping it in an extender object.

Parameters

$extender_name: The fully-qualified name of the extender class, without the leading '\' (for example, Drupal\my_module\myExtenderClass). The extender name will be checked against the current database connection to allow driver-specific subclasses as well, using the same logic as the query objects themselves.

Return value

\Drupal\Core\Database\Query\ExtendableInterface The extender object, which now contains a reference to this object.

Overrides ExtendableInterface::extend

File

core/lib/Drupal/Core/Database/Query/Select.php, line 320

Class

Select

Query builder for SELECT statements.

Namespace

Drupal\Core\Database\Query

Code

public function extend($extender_name) {
  $override_class = $extender_name . '_' . $this->connection
    ->driver();
  if (class_exists($override_class)) {
    $extender_name = $override_class;
  }
  return new $extender_name($this, $this->connection);
}