SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function toStartOfInterval (children 1)
     ExpressionList (children 2)
      Function toDate (children 1)
       ExpressionList (children 1)
        Literal UInt64_17933
      Function toIntervalMonth (children 1)
       ExpressionList (children 1)
        Literal UInt64_1