[DBAL-407] Be more specific on error code condition while detecting

lib/Doctrine/DBAL/Driver/PDOMySql/Driver.php

@@ -120,8 +120,9 @@ class Driver implements \Doctrine\DBAL\Driver
                 if (strpos($exception->getMessage(), 'Cannot delete or update a parent row: a foreign key constraint fails') !== false) {
                     return DBALException::ERROR_FOREIGN_KEY_CONSTRAINT;
                 }
-
+                if (strpos($exception->getMessage(), 'Duplicate entry') !== false) {
                     return DBALException::ERROR_DUPLICATE_KEY;
+                }
             case '42S02':
                 return DBALException::ERROR_UNKNOWN_TABLE;
             case '42S01':

lib/Doctrine/DBAL/Driver/PDOSqlite/Driver.php

@@ -121,7 +121,9 @@ class Driver implements \Doctrine\DBAL\Driver
     {
         switch ($exception->getCode()) {
             case 23000:
+                if (strpos($exception->getMessage(), 'must be unique') !== false) {
                     return DBALException::ERROR_DUPLICATE_KEY;
+                }
             case 'HY000':
                 if (strpos($exception->getMessage(), 'no such table:') !== false) {
                     return DBALException::ERROR_UNKNOWN_TABLE;