[HttpFoundation] smaller fixes for PdoSessionHandler#11009

Merged

fabpot merged 2 commits intosymfony:2.3from

Tobion:fix-pdo-session

Jun 4, 2014

Commits on May 28, 2014

[HttpFoundation] use different approach for duplicate keys in postgres, fix merge for sqlsrv and oracle
Tobion
committed

Commits on Jun 4, 2014

[Doctrine Bridge] fix DBAL session handler according to PdoSessionHandler
Tobion
committed