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/ >>>> >>>
