SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 4)
    QualifiedAsterisk (children 1)
     Identifier t1
    QualifiedAsterisk (children 1)
     Identifier t2
    Literal UInt64_123 (alias constant)
    Function isConstant (children 1)
     ExpressionList (children 1)
      Literal \'world\'
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (alias t1) (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 2)
           Function arrayJoin (alias k) (children 1)
            ExpressionList (children 1)
             Literal Array_[UInt64_1, UInt64_2]
           Literal UInt64_321
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      Subquery (alias t2) (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 2)
           Function arrayJoin (alias k) (children 1)
            ExpressionList (children 1)
             Literal Array_[UInt64_1, UInt64_3]
           Literal UInt64_123
     TableJoin (children 1)
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier t1.k
        Identifier t2.k
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier t1.k