Our behavior also conflicts with the SQL standard, we should also mention this in the document.
Till Rohrmann <trohrm...@apache.org> 于2020年10月27日周二 下午10:37写道： > Thanks for the clarification. This improvement would be helpful, I believe. > > Cheers, > Till > > On Tue, Oct 27, 2020 at 1:19 PM Jark Wu <imj...@gmail.com> wrote: > >> Hi Till, >> >> The documentation mentions that "this function is not deterministic" >> where the "not deterministic" means the value of this function is not >> deterministic for every record. >> However, this is not very clear for users. I think we can improve the >> documentation. >> >> Best, >> Jark >> >> On Tue, 27 Oct 2020 at 15:59, Till Rohrmann <trohrm...@apache.org> wrote: >> >>> Quick question Jark: Is this difference in behaviour documented? I >>> couldn't find it in the docs. >>> >>> Cheers, >>> Till >>> >>> On Tue, Oct 27, 2020 at 7:30 AM Jark Wu <imj...@gmail.com> wrote: >>> >>>> Hi Longdexin, >>>> >>>> In traditional batch sql, NOW() is executed and determined before the >>>> job is submitted and will not change for every processed record. >>>> However, this doesn't make much sense in streaming sql, therefore, >>>> NOW() function in Flink is executed for every record. >>>> >>>> Best, >>>> Jark >>>> >>>> On Fri, 23 Oct 2020 at 16:30, Till Rohrmann <trohrm...@apache.org> >>>> wrote: >>>> >>>>> Hi Longdexin, >>>>> >>>>> thanks for reaching out to the Flink community. I am pulling in Jark >>>>> who might be able to help you with this question. >>>>> >>>>> Cheers, >>>>> Till >>>>> >>>>> On Thu, Oct 22, 2020 at 2:56 PM Longdexin <274522...@qq.com> wrote: >>>>> >>>>>> From my point of view, the value of NOW() function in SQL is certain >>>>>> by the >>>>>> time when the streaming app is launched and will not change with the >>>>>> process >>>>>> time. However, as a new Flink user, I'm not so sure of that. By the >>>>>> way, if >>>>>> my attemp is to keep the time logic to update all the time, what >>>>>> should I >>>>>> do? >>>>>> >>>>>> >>>>>> >>>>>> -- >>>>>> Sent from: >>>>>> http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/ >>>>>> >>>>>
