lib/Doctrine/Table.php

@@ -700,7 +700,13 @@ class Doctrine_Table extends Doctrine_Configurable implements Countable
         }
 
 
-        if ($length == null) {
+        if ($length == null && 
+            $type === 'string' || 
+            $type === 'clob' || 
+            $type === 'integer' || 
+            $type === 'blob' || 
+            $type === 'gzip') {
+
             $length = 2147483647;
         }