SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function plus (alias m) (children 1)
     ExpressionList (children 2)
      Literal UInt64_1
      Function arrayJoin (children 1)
       ExpressionList (children 1)
        Identifier a
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 1)
           Literal Array_[UInt64_1, UInt64_2, UInt64_3] (alias a)
   ExpressionList (children 1)
    Identifier m
