SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Function toDateTime (alias t) (children 1)
     ExpressionList (children 1)
      Literal \'1970-01-01 00:00:01\'
    Function arrayJoin (alias x) (children 1)
     ExpressionList (children 1)
      Function array (children 1)
       ExpressionList (children 2)
        Literal NULL
        Function plus (children 1)
         ExpressionList (children 2)
          Function toDateTime64 (children 1)
           ExpressionList (children 2)
            Identifier t
            Literal UInt64_3
          Function toIntervalMillisecond (children 1)
           ExpressionList (children 1)
            Literal UInt64_100
   ExpressionList (children 1)
    Function in (children 1)
     ExpressionList (children 2)
      Identifier x
      Function tuple (children 1)
       ExpressionList (children 2)
        Function now (children 1)
         ExpressionList
        Literal NULL
   Set
