TransactionManagerBase::$rootId

The ID of the root Transaction object.

The unique identifier of the first 'root' transaction object created, when the stack is empty.

Normally, during the transaction stack lifecycle only one 'root' Transaction object is processed. Any post transaction callbacks are only processed during its destruction. However, there are cases when there could be multiple 'root' transaction objects in the stack. For example: a 'root' transaction object is opened, then a DDL statement is executed in a database that does not support transactional DDL, and because of that, another 'root' is opened before the original one is closed.

Keeping track of the first 'root' created allows us to process the post transaction callbacks only during its destruction and not during destruction of another one.

Type: rootId

File

core/lib/Drupal/Core/Database/Transaction/TransactionManagerBase.php, line 44

Class

TransactionManagerBase

The database transaction manager base class.

Namespace

Code

private ?string $rootId = NULL;