Android sqlite - select records where field is null or empty

db.rawQuery("SELECT * FROM myTable WHERE myColumn IS NULL", null);

I am using android studio 3.4, Room 2.1.0-alpha07

This is my Kotlin Code
I tried using this didn't work as expected

`@Query("SELECT *FROM notifications WHERE status=:status OR status = null")`   

This one is working fine

@Query("SELECT *FROM notifications WHERE status=:status OR status is null")

Just use "folder_name is null"

Try

cursor = db.query(DBHelper.TABLE_NAME, COLUMNS, "folder_name is null or folder_name = ?", new String[] {""}, null, null, DBHelper.TIMESTAMP_COL + " DESC");