[DDC-551] Fixed the escaping of filter parameters

lib/Doctrine/ORM/Query/Filter/SQLFilter.php

@@ -59,8 +59,7 @@ abstract class SQLFilter
             throw new \InvalidArgumentException("Parameter '" . $name . "' does not exist.");
         }
 
-        // @todo: espace the parameter
-        return $this->conn->convertToDatabaseValue($this->parameters[$name]['value'], $this->parameters[$name]['type']);
+        return $this->conn->quote($this->parameters[$name]['value'], $this->parameters[$name]['type']);
     }
 
     abstract function addFilterConstraint(ClassMetadata $targetEntity, $targetTableAlias);

tests/Doctrine/Tests/ORM/Functional/SQLFilterTest.php

@@ -144,7 +144,7 @@ class SQLFilterTest extends \Doctrine\Tests\OrmFunctionalTestCase
         // Setup mock connection
         $conn = $this->getMockConnection();
         $conn->expects($this->once())
-            ->method('convertToDatabaseValue')
+            ->method('quote')
             ->with($this->equalTo('en'))
             ->will($this->returnValue("'en'"));