Use constant

Author: fogelito

src/Database/Database.php

@@ -44,8 +44,8 @@ class Database
     public const VAR_SEQUENCE = 'sequence';
 
     // VAR_ID types
-    public const VAR_ID_INT = 'int';
-    public const VAR_ID_MONGO = 'mongo';
+    public const VAR_ID_INT = 'integer_';
+    public const VAR_ID_MONGO = 'mongo_';
 
     public const INT_MAX = 2147483647;
     public const BIG_INT_MAX = PHP_INT_MAX;