Thanks Hanyu! Make sense. I was mistaken that timestamp is also in the key for these queries.
Hao On Mon, Oct 30, 2023 at 1:46 PM Hanyu (Peter) Zheng <pzh...@confluent.io.invalid> wrote: > Hi, Hao, > > For TimestampedKeyQuery, it only returns the value of the key, and the > value should be ValueAndTimestamp<V>. > If you want to get an iterator of `ValueAndTimestamp<V>`, you can use > TimestampedRangeQuery. > > Sincerely, > Hanyu > > On Mon, Oct 30, 2023 at 1:42 PM Hanyu (Peter) Zheng <pzh...@confluent.io> > wrote: > > > Hi, Matthias, > > Now, if we use TimestampedKeyQuery to query kv-store, it will throw a > > exception, > > the exception like this: > > java.lang.IllegalArgumentException: Cannot get result for failed query. > > > > Sincerely, > > Hanyu > > > > On Thu, Oct 26, 2023 at 3:45 PM Hao Li <h...@confluent.io.invalid> wrote: > > > >> Thanks for the KIP Hanyu! One question: why not return an iterator of > >> `ValueAndTimestamp<V>` for `TimestampedKeyQuery`? I suppose for a > >> ts-kv-store, there could be multiple timestamps associated with the same > >> key? > >> > >> Hao > >> > >> On Thu, Oct 26, 2023 at 10:23 AM Matthias J. Sax <mj...@apache.org> > >> wrote: > >> > >> > Would we really get a ClassCastException? > >> > > >> > From my understanding, the store would reject the query as > unsupported > >> > and thus the returned `QueryResult` object would have it's internal > flag > >> > set to indicate the failure, but no exception would be thrown > directly? > >> > > >> > (Of course, there might be an exception thrown to the user if they > don't > >> > check `isSuccess()` flag but call `getResult()` directly.) > >> > > >> > > >> > -Matthias > >> > > >> > On 10/25/23 8:55 AM, Hanyu (Peter) Zheng wrote: > >> > > Hi, Bill, > >> > > Thank you for your reply. Yes, now, if a user executes a timestamped > >> > query > >> > > against a non-timestamped store, It will throw ClassCastException. > >> > > If a user uses KeyQuery to query kv-store or ts-kv-store, it always > >> > return > >> > > V. If a user uses TimestampedKeyQuery to query kv-store, it will > >> throw a > >> > > exception, so TimestampedKeyQuery query can only query ts-kv-store > and > >> > > return ValueAndTimestamp object in the end. > >> > > > >> > > Sincerely, > >> > > Hanyu > >> > > > >> > > On Wed, Oct 25, 2023 at 8:51 AM Hanyu (Peter) Zheng < > >> pzh...@confluent.io > >> > > > >> > > wrote: > >> > > > >> > >> Thank you Lucas, > >> > >> > >> > >> I will fix the capitalization. > >> > >> When a user executes a timestamped query against a non-timestamped > >> > store, > >> > >> It will throw ClassCastException. > >> > >> > >> > >> Sincerely, > >> > >> Hanyu > >> > >> > >> > >> On Tue, Oct 24, 2023 at 1:36 AM Lucas Brutschy > >> > >> <lbruts...@confluent.io.invalid> wrote: > >> > >> > >> > >>> Hi Hanyu, > >> > >>> > >> > >>> reading the KIP, I was wondering the same thing as Bill. > >> > >>> > >> > >>> Other than that, this looks good to me. Thanks for KIP. > >> > >>> > >> > >>> nit: you have method names `LowerBound` and `UpperBound`, where > you > >> > >>> probably want to fix the capitalization. > >> > >>> > >> > >>> Cheers, > >> > >>> Lucas > >> > >>> > >> > >>> On Mon, Oct 23, 2023 at 5:46 PM Bill Bejeck <bbej...@gmail.com> > >> wrote: > >> > >>>> > >> > >>>> Hey Hanyu, > >> > >>>> > >> > >>>> Thanks for the KIP, it's a welcomed addition. > >> > >>>> Overall, the KIP looks good to me, I just have one comment. > >> > >>>> > >> > >>>> Can you discuss the expected behavior when a user executes a > >> > timestamped > >> > >>>> query against a non-timestamped store? I think it should throw > an > >> > >>>> exception vs. using some default value. > >> > >>>> If it's the case that Kafka Stream wraps all stores in a > >> > >>>> `TimestampAndValue` store and returning a plain `V` or a > >> > >>>> `TimestampAndValue<V>` object depends on the query type, then it > >> would > >> > >>> be > >> > >>>> good to add those details to the KIP. > >> > >>>> > >> > >>>> Thanks, > >> > >>>> Bill > >> > >>>> > >> > >>>> > >> > >>>> > >> > >>>> On Fri, Oct 20, 2023 at 5:07 PM Hanyu (Peter) Zheng > >> > >>>> <pzh...@confluent.io.invalid> wrote: > >> > >>>> > >> > >>>>> Thank you Matthias, > >> > >>>>> > >> > >>>>> I will modify the KIP to eliminate this restriction. > >> > >>>>> > >> > >>>>> Sincerely, > >> > >>>>> Hanyu > >> > >>>>> > >> > >>>>> On Fri, Oct 20, 2023 at 2:04 PM Hanyu (Peter) Zheng < > >> > >>> pzh...@confluent.io> > >> > >>>>> wrote: > >> > >>>>> > >> > >>>>>> Thank you Alieh, > >> > >>>>>> > >> > >>>>>> In these two new query types, I will remove 'get' from all > getter > >> > >>> method > >> > >>>>>> names. > >> > >>>>>> > >> > >>>>>> Sincerely, > >> > >>>>>> Hanyu > >> > >>>>>> > >> > >>>>>> On Fri, Oct 20, 2023 at 10:40 AM Matthias J. Sax < > >> mj...@apache.org> > >> > >>>>> wrote: > >> > >>>>>> > >> > >>>>>>> Thanks for the KIP Hanyu, > >> > >>>>>>> > >> > >>>>>>> One questions: > >> > >>>>>>> > >> > >>>>>>>> To address this inconsistency, we propose that KeyQuery > should > >> > >>> be > >> > >>>>>>> restricted to querying kv-stores only, ensuring that it > always > >> > >>> returns > >> > >>>>> a > >> > >>>>>>> plain V type, making the behavior of the aforementioned code > >> more > >> > >>>>>>> predictable. Similarly, RangeQuery should be dedicated to > >> querying > >> > >>>>>>> kv-stores , consistently returning only the plain V . > >> > >>>>>>> > >> > >>>>>>> Why do you want to restrict `KeyQuery` and `RangeQuery` to > >> > >>> kv-stores? I > >> > >>>>>>> think it would be possible to still allow both queries for > >> > >>> ts-kv-stores, > >> > >>>>>>> but change the implementation to return "plain V" instead of > >> > >>>>>>> `ValueAndTimestamp<V>`, ie, the implementation would > >> automatically > >> > >>>>>>> unwrap the value. > >> > >>>>>>> > >> > >>>>>>> > >> > >>>>>>> > >> > >>>>>>> -Matthias > >> > >>>>>>> > >> > >>>>>>> On 10/20/23 2:32 AM, Alieh Saeedi wrote: > >> > >>>>>>>> Hey Hanyu, > >> > >>>>>>>> > >> > >>>>>>>> Thanks for the KIP. It seems good to me. > >> > >>>>>>>> Just one point: AFAIK, we are going to remove "get" from the > >> > >>> name of > >> > >>>>> all > >> > >>>>>>>> getter methods. > >> > >>>>>>>> > >> > >>>>>>>> Cheers, > >> > >>>>>>>> Alieh > >> > >>>>>>>> > >> > >>>>>>>> On Thu, Oct 19, 2023 at 5:44 PM Hanyu (Peter) Zheng > >> > >>>>>>>> <pzh...@confluent.io.invalid> wrote: > >> > >>>>>>>> > >> > >>>>>>>>> Hello everyone, > >> > >>>>>>>>> > >> > >>>>>>>>> I would like to start the discussion for KIP-992: Proposal > to > >> > >>>>> introduce > >> > >>>>>>>>> IQv2 Query Types: TimestampedKeyQuery and > >> TimestampedRangeQuery > >> > >>>>>>>>> > >> > >>>>>>>>> The KIP can be found here: > >> > >>>>>>>>> > >> > >>>>>>>>> > >> > >>>>>>> > >> > >>>>> > >> > >>> > >> > > >> > https://cwiki.apache.org/confluence/display/KAFKA/KIP-992%3A+Proposal+to+introduce+IQv2+Query+Types%3A+TimestampedKeyQuery+and+TimestampedRangeQuery > >> > >>>>>>>>> > >> > >>>>>>>>> Any suggestions are more than welcome. > >> > >>>>>>>>> > >> > >>>>>>>>> Many thanks, > >> > >>>>>>>>> Hanyu > >> > >>>>>>>>> > >> > >>>>>>>>> On Thu, Oct 19, 2023 at 8:17 AM Hanyu (Peter) Zheng < > >> > >>>>>>> pzh...@confluent.io> > >> > >>>>>>>>> wrote: > >> > >>>>>>>>> > >> > >>>>>>>>>> > >> > >>>>>>>>>> > >> > >>>>>>>>> > >> > >>>>>>> > >> > >>>>> > >> > >>> > >> > > >> > https://cwiki.apache.org/confluence/display/KAFKA/KIP-992%3A+Proposal+to+introduce+IQv2+Query+Types%3A+TimestampedKeyQuery+and+TimestampedRangeQuery > >> > >>>>>>>>>> > >> > >>>>>>>>>> -- > >> > >>>>>>>>>> > >> > >>>>>>>>>> [image: Confluent] <https://www.confluent.io> > >> > >>>>>>>>>> Hanyu (Peter) Zheng he/him/his > >> > >>>>>>>>>> Software Engineer Intern > >> > >>>>>>>>>> +1 (213) 431-7193 <+1+(213)+431-7193> > >> > >>>>>>>>>> Follow us: [image: Blog] > >> > >>>>>>>>>> < > >> > >>>>>>>>> > >> > >>>>>>> > >> > >>>>> > >> > >>> > >> > > >> > https://www.confluent.io/blog?utm_source=footer&utm_medium=email&utm_campaign=ch.email-signature_type.community_content.blog > >> > >>>>>>>>>> [image: > >> > >>>>>>>>>> Twitter] <https://twitter.com/ConfluentInc>[image: > LinkedIn] > >> > >>>>>>>>>> <https://www.linkedin.com/in/hanyu-peter-zheng/>[image: > >> Slack] > >> > >>>>>>>>>> <https://slackpass.io/confluentcommunity>[image: YouTube] > >> > >>>>>>>>>> <https://youtube.com/confluent> > >> > >>>>>>>>>> > >> > >>>>>>>>>> [image: Try Confluent Cloud for Free] > >> > >>>>>>>>>> < > >> > >>>>>>>>> > >> > >>>>>>> > >> > >>>>> > >> > >>> > >> > > >> > https://www.confluent.io/get-started?utm_campaign=tm.fm-apac_cd.inbound&utm_source=gmail&utm_medium=organic > >> > >>>>>>>>>> > >> > >>>>>>>>>> > >> > >>>>>>>>> > >> > >>>>>>>>> > >> > >>>>>>>>> -- > >> > >>>>>>>>> > >> > >>>>>>>>> [image: Confluent] <https://www.confluent.io> > >> > >>>>>>>>> Hanyu (Peter) Zheng he/him/his > >> > >>>>>>>>> Software Engineer Intern > >> > >>>>>>>>> +1 (213) 431-7193 <+1+(213)+431-7193> > >> > >>>>>>>>> Follow us: [image: Blog] > >> > >>>>>>>>> < > >> > >>>>>>>>> > >> > >>>>>>> > >> > >>>>> > >> > >>> > >> > > >> > https://www.confluent.io/blog?utm_source=footer&utm_medium=email&utm_campaign=ch.email-signature_type.community_content.blog > >> > >>>>>>>>>> [image: > >> > >>>>>>>>> Twitter] <https://twitter.com/ConfluentInc>[image: > LinkedIn] > >> > >>>>>>>>> <https://www.linkedin.com/in/hanyu-peter-zheng/>[image: > >> Slack] > >> > >>>>>>>>> <https://slackpass.io/confluentcommunity>[image: YouTube] > >> > >>>>>>>>> <https://youtube.com/confluent> > >> > >>>>>>>>> > >> > >>>>>>>>> [image: Try Confluent Cloud for Free] > >> > >>>>>>>>> < > >> > >>>>>>>>> > >> > >>>>>>> > >> > >>>>> > >> > >>> > >> > > >> > https://www.confluent.io/get-started?utm_campaign=tm.fm-apac_cd.inbound&utm_source=gmail&utm_medium=organic > >> > >>>>>>>>>> > >> > >>>>>>>>> > >> > >>>>>>>> > >> > >>>>>>> > >> > >>>>>> > >> > >>>>>> > >> > >>>>>> -- > >> > >>>>>> > >> > >>>>>> [image: Confluent] <https://www.confluent.io> > >> > >>>>>> Hanyu (Peter) Zheng he/him/his > >> > >>>>>> Software Engineer Intern > >> > >>>>>> +1 (213) 431-7193 <+1+(213)+431-7193> > >> > >>>>>> Follow us: [image: Blog] > >> > >>>>>> < > >> > >>>>> > >> > >>> > >> > > >> > https://www.confluent.io/blog?utm_source=footer&utm_medium=email&utm_campaign=ch.email-signature_type.community_content.blog > >> > >>>>>> [image: > >> > >>>>>> Twitter] <https://twitter.com/ConfluentInc>[image: LinkedIn] > >> > >>>>>> <https://www.linkedin.com/in/hanyu-peter-zheng/>[image: Slack] > >> > >>>>>> <https://slackpass.io/confluentcommunity>[image: YouTube] > >> > >>>>>> <https://youtube.com/confluent> > >> > >>>>>> > >> > >>>>>> [image: Try Confluent Cloud for Free] > >> > >>>>>> < > >> > >>>>> > >> > >>> > >> > > >> > https://www.confluent.io/get-started?utm_campaign=tm.fm-apac_cd.inbound&utm_source=gmail&utm_medium=organic > >> > >>>>>> > >> > >>>>>> > >> > >>>>> > >> > >>>>> > >> > >>>>> -- > >> > >>>>> > >> > >>>>> [image: Confluent] <https://www.confluent.io> > >> > >>>>> Hanyu (Peter) Zheng he/him/his > >> > >>>>> Software Engineer Intern > >> > >>>>> +1 (213) 431-7193 <+1+(213)+431-7193> > >> > >>>>> Follow us: [image: Blog] > >> > >>>>> < > >> > >>>>> > >> > >>> > >> > > >> > https://www.confluent.io/blog?utm_source=footer&utm_medium=email&utm_campaign=ch.email-signature_type.community_content.blog > >> > >>>>>> [image: > >> > >>>>> Twitter] <https://twitter.com/ConfluentInc>[image: LinkedIn] > >> > >>>>> <https://www.linkedin.com/in/hanyu-peter-zheng/>[image: Slack] > >> > >>>>> <https://slackpass.io/confluentcommunity>[image: YouTube] > >> > >>>>> <https://youtube.com/confluent> > >> > >>>>> > >> > >>>>> [image: Try Confluent Cloud for Free] > >> > >>>>> < > >> > >>>>> > >> > >>> > >> > > >> > https://www.confluent.io/get-started?utm_campaign=tm.fm-apac_cd.inbound&utm_source=gmail&utm_medium=organic > >> > >>>>>> > >> > >>>>> > >> > >>> > >> > >> > >> > >> > >> > >> -- > >> > >> > >> > >> [image: Confluent] <https://www.confluent.io> > >> > >> Hanyu (Peter) Zheng he/him/his > >> > >> Software Engineer Intern > >> > >> +1 (213) 431-7193 <+1+(213)+431-7193> > >> > >> Follow us: [image: Blog] > >> > >> < > >> > > >> > https://www.confluent.io/blog?utm_source=footer&utm_medium=email&utm_campaign=ch.email-signature_type.community_content.blog > >> > >[image: > >> > >> Twitter] <https://twitter.com/ConfluentInc>[image: LinkedIn] > >> > >> <https://www.linkedin.com/in/hanyu-peter-zheng/>[image: Slack] > >> > >> <https://slackpass.io/confluentcommunity>[image: YouTube] > >> > >> <https://youtube.com/confluent> > >> > >> > >> > >> [image: Try Confluent Cloud for Free] > >> > >> < > >> > > >> > https://www.confluent.io/get-started?utm_campaign=tm.fm-apac_cd.inbound&utm_source=gmail&utm_medium=organic > >> > > > >> > >> > >> > > > >> > > > >> > > >> > > > > > > -- > > > > [image: Confluent] <https://www.confluent.io> > > Hanyu (Peter) Zheng he/him/his > > Software Engineer Intern > > +1 (213) 431-7193 <+1+(213)+431-7193> > > Follow us: [image: Blog] > > < > https://www.confluent.io/blog?utm_source=footer&utm_medium=email&utm_campaign=ch.email-signature_type.community_content.blog > >[image: > > Twitter] <https://twitter.com/ConfluentInc>[image: LinkedIn] > > <https://www.linkedin.com/in/hanyu-peter-zheng/>[image: Slack] > > <https://slackpass.io/confluentcommunity>[image: YouTube] > > <https://youtube.com/confluent> > > > > [image: Try Confluent Cloud for Free] > > < > https://www.confluent.io/get-started?utm_campaign=tm.fm-apac_cd.inbound&utm_source=gmail&utm_medium=organic > > > > > > > -- > > [image: Confluent] <https://www.confluent.io> > Hanyu (Peter) Zheng he/him/his > Software Engineer Intern > +1 (213) 431-7193 <+1+(213)+431-7193> > Follow us: [image: Blog] > < > https://www.confluent.io/blog?utm_source=footer&utm_medium=email&utm_campaign=ch.email-signature_type.community_content.blog > >[image: > Twitter] <https://twitter.com/ConfluentInc>[image: LinkedIn] > <https://www.linkedin.com/in/hanyu-peter-zheng/>[image: Slack] > <https://slackpass.io/confluentcommunity>[image: YouTube] > <https://youtube.com/confluent> > > [image: Try Confluent Cloud for Free] > < > https://www.confluent.io/get-started?utm_campaign=tm.fm-apac_cd.inbound&utm_source=gmail&utm_medium=organic > > >
