git.m6w6.name Git - mdref/mdref-pq/blob - pq/Transaction/savepoint.md

   1 # void pq\Transaction::savepoint()
   2
   3 Create a `SAVEPOINT` within this transaction.
   4
   5 > ***NOTE:***
   6   pq\Transaction tracks an internal counter as savepoint identifier.
   7
   8 ## Params:
   9
  10 None.
  11
  12 ## Throws:
  13
  14 * pq\Exception\InvalidArgumentException
  15 * pq\Exception\BadMethodCallException
  16 * pq\Exception\RuntimeException
  17
  18
  19 ## Example:
  20
  21         <?php
  22
  23         $connection = new pq\Connection;
  24         $transaction = $connection->startTransaction();
  25
  26         // create a savepoint
  27         $transaction->savepoint();
  28         // create another savepoint
  29         $transaction->savepoint();
  30
  31         // rollback to previous savepoint
  32         $transaction->rollback();
  33         // release first savepoint
  34         $transaction->commit();
  35         // commit transaction
  36         $transaction->commit();
  37
  38         ?>