SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function plus (children 1)
     ExpressionList (children 2)
      Function parseDateTime64BestEffort (children 1)
       ExpressionList (children 3)
        Literal \'1969-01-01 00:00:00.500\'
        Literal UInt64_3
        Literal \'UTC\'
      Function toIntervalSecond (children 1)
       ExpressionList (children 1)
        Literal UInt64_1
