SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function in (children 1)
     ExpressionList (children 2)
      Function tuple (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 1)
          Literal NULL
        Function tuple (children 1)
         ExpressionList (children 1)
          Literal UInt64_1
      Function tuple (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 1)
          Literal NULL
        Function tuple (children 1)
         ExpressionList (children 1)
          Literal UInt64_1