doctrine/dbal — pull request #465 by deeky666 (2013-12-23 23:28:16+00:00)
Title: [DBAL-423] Optimize non-native GUID type declaration

Currently non-native GUID type is mapped to `VARCHAR(255)` which is not effective as GUID always has a fixed length of 36 characters. Therefore it should be mapped to `CHAR(36)` instead.