COALESCE seems to pose issues (wront data are sent back)

Lib/db/User.php

@@ -105,11 +105,7 @@ class User extends DbMapping
                                 SELECT
                                     NoticeID,
                                     Tag AS Field,
-                                    LTRIM(RTRIM(COALESCE(
+                                    NoticeFields.ContentShortPart AS Data
-                                        NULLIF(NoticeFields.ContentShortPart, ''),
-                                        NULLIF(NoticeFields.ContentLongPart, ''),
-                                        'na'
-                                    ))) AS Data
                                 FROM NoticeFields
                                 WHERE Tag IN ('901', '300')
                             ) AS src