AlterQuery  video_log (children 2)
 ExpressionList (children 1)
  AlterCommand ADD_PROJECTION (children 1)
   Projection (children 1)
    ProjectionSelectQuery (children 2)
     ExpressionList (children 4)
      Identifier datetime
      Identifier device_id
      Identifier bytes
      Identifier duration
     Identifier device_id
 Identifier video_log