According to comment https://github.com/doctrine/dbal/pull/854#issuecomment-126935212

Features and changes:
* jsonb can be used with: options={"jsonb"=true}
* OVER is no longer reserved
* LATERAL is now reserved

Fixes an issue when calling `ping()` where `$this->platform` is null. Happened to me because using the `'pdo'` param bypasses the `connect()` method and the platform is never set without explicitly calling the method.

Not sure if this is the most elegant way to deal with this but it worked enough for my purposes so I figured I should submit a PR.

This reverts commit aa4d483f.

Add conversion exception when date and time type convertToDatabaseValue methods are passed non-null values that are not DateTime instances.

To fix the following notice-level errors:

Notice: Undefined property: Doctrine\DBAL\Connections\MasterSlaveConnection::$_conn in vendor/doctrine/dbal/lib/Doctrine/DBAL/Connections/MasterSlaveConnection.php line 154
Notice: Undefined index: slave in vendor/doctrine/dbal/lib/Doctrine/DBAL/Connections/MasterSlaveConnection.php line 165

removed empty line

Fixes #402 (https://github.com/doctrine/DoctrineBundle/issues/402) by connecting by default to 'template1' instead of the database with the same name as the user (Postgre default in case of no dbname).