add new 2.2 Types's functions relative to SQL conversion

en/reference/types.rst

@@ -132,6 +132,32 @@ Now we implement our ``Doctrine\DBAL\Types\Type`` instance:
         }
     }
 
+You can modify the SQL declaration Doctrine will use. First, you need to enable this feature by overriding the canRequireSQLConversion method: 
+
+::
+
+    <?php
+    public function canRequireSQLConversion()
+    {
+        return true;
+    }
+
+Then you can override the methods convertToPhpValueSQL and convertToDatabaseValueSQL : 
+
+::
+
+    <?php
+    public function convertToPHPValueSQL($sqlExpr, $platform)
+    {
+        return 'MyMoneyFunction(\''.$sqlExpr.') ';
+    }
+    
+    public function convertToDatabaseValueSQL($sqlExpr, AbstractPlatform $platform)
+    {
+        return 'MyFunction('.$sqlExpr.')';
+    }
+
+
 Now we have to register this type with the Doctrine Type system and
 hook it into the database platform: