SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Function arrayJoin (children 1)
     ExpressionList (children 1)
      Literal Array_[UInt64_0]
    Function replicate (children 1)
     ExpressionList (children 2)
      Literal \'hello\'
      Function emptyArrayString (children 1)
       ExpressionList
   Function not (children 1)
    ExpressionList (children 1)
     Function ignore (children 1)
      ExpressionList (children 1)
       Function replicate (children 1)
        ExpressionList (children 2)
         Literal \'hello\'
         Function emptyArrayString (children 1)
          ExpressionList
