DDC-179 - Use ! modifier in Date Format to reset all non-date parts to zero unix timestamp values, i.e. H:i:s => '00:00:00' always

lib/Doctrine/DBAL/Platforms/AbstractPlatform.php

@@ -1719,7 +1719,7 @@ abstract class AbstractPlatform
      */
     public function getDateFormatString()
     {
-        return 'Y-m-d';
+        return '!Y-m-d';
     }
     
     /**

tests/Doctrine/Tests/DBAL/Types/DateTest.php

@@ -34,4 +34,11 @@ class DateTest extends \Doctrine\Tests\DbalTestCase
             instanceof \DateTime
         );
     }
+
+    public function testDateResetsNonDatePartsToZeroUnixTimeValues()
+    {
+        $date = $this->_type->convertToPHPValue('1985-09-01', $this->_platform);
+
+        $this->assertEquals('00:00:00', $date->format('H:i:s'));
+    }
 }