public function SelectInterface::forUpdate

Add FOR UPDATE to the query.

FOR UPDATE prevents the rows retrieved by the SELECT statement from being modified or deleted by other transactions until the current transaction ends. Other transactions that attempt UPDATE, DELETE, or SELECT FOR UPDATE of these rows will be blocked until the current transaction ends.

Parameters

$set: IF TRUE, FOR UPDATE will be added to the query, if FALSE then it won't.

Return value

Drupal\Core\Database\Query\ConditionInterface The called object.

File

drupal/core/lib/Drupal/Core/Database/Query/SelectInterface.php, line 503

Definition of Drupal\Core\Database\Query\SelectInterface

Class

SelectInterface

Interface definition for a Select Query object.

Namespace

Code

public function forUpdate($set = TRUE);