Hi, I think my problem is only a special example of IOTDB-335, my work will use some existing functions to implement a 'last' function we possibly need now, but it can't be a general way to solve IOTDB-335, and I also don't know how to deal with IOTDB-335 , perhaps others could help. Yi Tao
At 2019-12-03 15:48:13, "刘大伟" <13965...@qq.com> wrote: >Hi, >I'm terribly sorry to bother you, is this the same problem as >IOTDB-335(https://issues.apache.org/jira/browse/IOTDB-335 ><https://issues.apache.org/jira/browse/IOTDB-335>)? > > > >> 在 2019年12月3日，下午3:37，thss15_yit <thss15_...@163.com> 写道： >> >> Hi, >> Now I'm trying to design and develop a new 'last' function to get the >> last time-value pairs in one or several timeseries, working on JIRA issue >> [IOTDB-298], Now an example of this function is SELECT LAST(d0.s1, d1.s2) >> FROM root.sg1 , to get the last value in root.sg1.d0.s1 and root.sg1.d1.s2 >> You can see the function's particular grammar and examples in the >> attached file last.md . >> I'm glad to get your suggestions. Thank you. >> Tao Yi >> >> >> >> >> >> At 2019-11-29 11:30:18, "thss15_yit" <thss15_...@163.com> wrote: >> >Hi, >> > I have been working on JIRA issue [IOTDB-298], and now in the following >> > pull request I change the aggregation function's name from first,last to >> > first_value,last_value to make it more clear, and change the relevant >> > documents. >> > The pull request is https://github.com/apache/incubator-iotdb/pull/594, >> > Thanks for your checking. >> > I'm going to complete a new 'last' function to get the last point(s) on >> > this issue. The function still needs to be discussed. Thanks for your idea. >> >Tao Yi >> > >> > >> > >> > >> > >> >> >> >
