lib/Doctrine/DataDict/Mssql.php

@@ -159,8 +159,11 @@ class Doctrine_DataDict_Mssql extends Doctrine_DataDict
             break;
             case 'text':
             case 'varchar':
+            case 'ntext':
+            case 'nvarchar':
                 $fixed = false;
             case 'char':
+            case 'nchar':
                 $type[0] = 'string';
                 if ($length == '1') {
                     $type[] = 'boolean';

lib/Doctrine/Import/Mssql.php

@@ -85,7 +85,7 @@ class Doctrine_Import_Mssql extends Doctrine_Import
                 'length'    => $decl['length'],
                 'fixed'     => $decl['fixed'],
                 'unsigned'  => $decl['unsigned'],
-                'notnull'   => (bool) ($val['is_nullable'] === 'NO'),
+                'notnull'   => (bool) (trim($val['is_nullable']) === 'NO'),
                 'default'   => $val['column_def'],
                 'primary'   => (strtolower($identity) == 'identity'),
             );