code: public Cursor rawQuery(String sql) {
  		SQLiteDatabase db = getDatabaseConnection();
  		return new DbClosingCursor(db.rawQuery(sql, null), this);
  	}
docs: Executes a raw query on the database. Note that when calling close on the returned cursor the database connection count is reduces as well.
  
  @param sql Raw SQL statement
  @return A Cursor containing the result, which reduces the database connection count when closed