SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function in (children 1)
     ExpressionList (children 2)
      Literal NULL
      Function tuple (children 1)
       ExpressionList (children 4)
        Literal UInt64_258
        Function CAST (children 1)
         ExpressionList (children 2)
          Literal \'string\'
          Literal \'Nullable(String)\'
        Function CAST (children 1)
         ExpressionList (children 2)
          Identifier number
          Literal \'Nullable(UInt64)\'
        Literal NULL
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function numbers (children 1)
       ExpressionList (children 1)
        Literal UInt64_1
   Set
