SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function lessOrEquals (children 1)
     ExpressionList (children 2)
      Function minus (children 1)
       ExpressionList (children 2)
        Function dateDiff (children 1)
         ExpressionList (children 3)
          Literal \'second\'
          Function toDate32 (children 1)
           ExpressionList (children 1)
            Literal \'1927-01-01\'
          Function toDateTime64 (children 1)
           ExpressionList (children 2)
            Literal \'1927-01-02 00:00:00\'
            Literal UInt64_3
        Function timeDiff (children 1)
         ExpressionList (children 2)
          Function toDate32 (children 1)
           ExpressionList (children 1)
            Literal \'1927-01-01\'
          Function toDateTime64 (children 1)
           ExpressionList (children 2)
            Literal \'1927-01-02 00:00:00\'
            Literal UInt64_3
      Literal UInt64_2