issue created: https://issues.apache.org/jira/browse/FLINK-19861
On Wed, 28 Oct 2020 at 11:00, Danny Chan <danny0...@apache.org> wrote: > 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/ >>>>>>> >>>>>>
