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 toDateTime64 (children 1)
           ExpressionList (children 2)
            Literal \'1927-01-01 00:00:00\'
            Literal UInt64_3
          Function toDate32 (children 1)
           ExpressionList (children 1)
            Literal \'1927-01-02\'
        Function timeDiff (children 1)
         ExpressionList (children 2)
          Function toDateTime64 (children 1)
           ExpressionList (children 2)
            Literal \'1927-01-01 00:00:00\'
            Literal UInt64_3
          Function toDate32 (children 1)
           ExpressionList (children 1)
            Literal \'1927-01-02\'
      Literal UInt64_2
