*Talk duration*: 30 min. ср, 13 янв. 2021 г. в 10:27, Vladimir Ozerov <[email protected]>:
> Hi Stamatis, Julian, > > Thank you for releasing the slot. Just to be crystal clear - I was very > late with my proposal, and have no urge to present in January. Both January > and April are perfectly fine with me. So please prioritize this talk over > others only if you see a really good reason to do so. In any case, I > confirm that I can present in January. Please find the talk details below. > > *Speaker:* Vladimir Ozerov > *Title:* Apache Calcite integration in Hazelcast IMDG > *Abstract: * > Hazelcast IMDG is a distributed in-memory key-value store. In this talk, I > will present how we used Apache Calcite to create a new distributed SQL > engine that queries Hazelcast IMDG data. > We start with motivation and general design. Then we examine how Hazelcast > IMDG leverages Apache Calcite for query parsing, validation, and > optimization, and why we decided not to use Apache Calcite for JDBC and > query execution. We also discuss several Apache Calcite problems that > negatively affect the integration and propose possible future improvements. > > Regards, > Vladimir. > > ср, 13 янв. 2021 г. в 02:48, Stamatis Zampetakis <[email protected]>: > >> Yesterday, I updated our website to also include Vladimir's talk about >> Hazelcast so I think it is better to keep it that way. >> Initially I had in mind something between 2 and 4 talks for this meetup >> (2-3h) so I think we are good to go. >> >> Let's now freeze the agenda to avoid changing it till the last minute. >> I will open up the discussion for the next meetup in another email so we >> start filling the slots for April. >> >> It's definitely useful to have the talks on camera. I will record them via >> Zoom and split them after the meetup. >> If the presenters give their consent I can upload them afterwards to >> Youtube/Vimeo. >> >> Best, >> Stamatis >> >> >> On Wed, Jan 13, 2021 at 12:15 AM Julian Hyde <[email protected]> wrote: >> >> > I'm happy to yield my spot (and speak instead in April) if Vladimir is >> > still prepared to talk. I'd love to get his work on Hazelcast >> > integration on the record! >> > >> > By the way, will it be possible to record these talks and post them >> > *as separate items* to (say) YouTube or Vimeo? I think it's important >> > that they are separate, so that people can find the particular talk >> > they are interested in. >> > >> > Julian >> > >> > On Tue, Jan 12, 2021 at 12:17 AM Vladimir Ozerov <[email protected]> >> > wrote: >> > > >> > > Hi Stamatis, >> > > >> > > Sorry, my previous email was not clear enough. To clarify - I was >> > thinking >> > > about the mentioned next meetup in April because the schedule for the >> > > January meetup appears to be too packed already (3 talks in 1:30h). I >> > > I am ready to talk in both January and April. Just want to ensure >> that we >> > > do not overwhelm our attendees. >> > > >> > > I'll provide the talk details in the nearest day. >> > > >> > > Regards, >> > > Vladimir. >> > > >> > > вт, 12 янв. 2021 г. в 01:41, Stamatis Zampetakis <[email protected]>: >> > > >> > > > That would be great Vladimir, I will update the agenda. >> > > > >> > > > If possible please provide a title, duration, and abstract. >> > > > >> > > > Best, >> > > > Stamatis >> > > > >> > > > On Mon, Jan 11, 2021 at 8:35 PM Vladimir Ozerov <[email protected] >> > >> > > > wrote: >> > > > >> > > > > Hi, >> > > > > >> > > > > I can share our experience with Apache Calcite integration into >> > > > Hazelcast >> > > > > distributed SQL engine. >> > > > > >> > > > > Regards, >> > > > > Vladimir >> > > > > >> > > > > Вт, 5 янв. 2021 г. в 00:48, Vineet G <[email protected]>: >> > > > > >> > > > > > Hi Stamatis, >> > > > > > >> > > > > > Something has come up and unfortunately I will not be able to >> > present >> > > > the >> > > > > > talk. >> > > > > > >> > > > > > Vineet >> > > > > > >> > > > > > > On Jan 3, 2021, at 1:37 PM, Stamatis Zampetakis < >> > [email protected]> >> > > > > > wrote: >> > > > > > > >> > > > > > > I updated the agenda on meetup to include Julian's talk around >> > > > spatial >> > > > > > > queries. >> > > > > > > >> > > > > > > So far we have four presentations lasting approximately 1h45 >> so I >> > > > still >> > > > > > > find the duration reasonable. >> > > > > > > >> > > > > > > Of course if there are more people interested to present >> > something we >> > > > > can >> > > > > > > schedule another meetup in April as Julian suggested. >> > > > > > > I am always happy to see what other people are working on and >> > more >> > > > > > Calcite >> > > > > > > use-cases. >> > > > > > > >> > > > > > > Best, >> > > > > > > Stamatis >> > > > > > > >> > > > > > > On Sun, Jan 3, 2021 at 2:09 AM Julian Hyde < >> > [email protected]> >> > > > > > wrote: >> > > > > > > >> > > > > > >> In other news.... I’ll be co-presenting (with Mosha >> Pasumansky) >> > a >> > > > talk >> > > > > > >> “Open source SQL - beyond parsers: ZetaSQL and Apache >> Calcite” >> > at >> > > > the >> > > > > > >> Northwest Database Society Annual Meeting on January 29th. >> It’s >> > > > > virtual >> > > > > > and >> > > > > > >> free, but you must sign up to attend. >> > > > > > >> >> > > > > > >> Julian >> > > > > > >> >> > > > > > >> [1] https://sites.google.com/view/nwds2021 >> > > > > > >> >> > > > > > >>> On Jan 2, 2021, at 12:47 PM, Julian Hyde < >> > [email protected]> >> > > > > > wrote: >> > > > > > >>> >> > > > > > >>> I can give a talk “Implementing spatial queries using >> algebra >> > > > > > >> rewrites”, 20 minutes. >> > > > > > >>> >> > > > > > >>> But if that makes the meetup too long, I am equally happy to >> > > > postpone >> > > > > > >> the talk. How about scheduling another meetup in say April? >> > > > > > >>> >> > > > > > >>> Julian >> > > > > > >>> >> > > > > > >>>> On Dec 31, 2020, at 3:10 AM, Stamatis Zampetakis < >> > > > [email protected] >> > > > > > >> > > > > > >> wrote: >> > > > > > >>>> >> > > > > > >>>> I just published the event on Meetup [1]. >> > > > > > >>>> >> > > > > > >>>> The agenda is not yet finalized so if there are people who >> > would >> > > > > like >> > > > > > to >> > > > > > >>>> give a talk or add/remove things from the agenda please >> reply >> > to >> > > > > this >> > > > > > >>>> thread. >> > > > > > >>>> >> > > > > > >>>> Best, >> > > > > > >>>> Stamatis >> > > > > > >>>> >> > > > > > >>>> [1] >> https://www.meetup.com/Apache-Calcite/events/275461117/ >> > > > > > >>>> >> > > > > > >>>>>> On Mon, Nov 30, 2020 at 12:37 AM Rui Wang < >> > [email protected] >> > > > > >> > > > > > >> wrote: >> > > > > > >>>>> >> > > > > > >>>>> Title: event timestamp semantic based streaming SQL >> > > > > > >>>>> Abstract: this talk will cover in Calcite Streaming SQL >> > case, how >> > > > > to >> > > > > > >> reason >> > > > > > >>>>> data completeness in terms of event timestamp semantic and >> > how to >> > > > > > >> control >> > > > > > >>>>> materialization latency given unbounded input data (in >> > Calcite >> > > > > > roadmap >> > > > > > >> but >> > > > > > >>>>> not implemented yet). >> > > > > > >>>>> >> > > > > > >>>>> Duration: 20~30 mins >> > > > > > >>>>> >> > > > > > >>>>>> On Tue, Nov 24, 2020 at 8:56 AM Slim Bouguerra < >> > > > [email protected]> >> > > > > > >> wrote: >> > > > > > >>>>>> >> > > > > > >>>>>> this is a great idea thanks @Statmatis looking forward to >> > > > learning >> > > > > > >> more >> > > > > > >>>>>> about Calcite especially the Streaming work. >> > > > > > >>>>>> >> > > > > > >>>>>>> On Mon, Nov 23, 2020 at 2:19 PM Rui Wang < >> > [email protected] >> > > > > >> > > > > > >> wrote: >> > > > > > >>>>>> >> > > > > > >>>>>>> Sorry for the late reply Statmatis. I have recently been >> > pretty >> > > > > > busy >> > > > > > >> on >> > > > > > >>>>>>> work as it is approaching the end of the year. >> > > > > > >>>>>>> >> > > > > > >>>>>>> The time in [1] works perfectly for me. I will share the >> > > > abstract >> > > > > > and >> > > > > > >>>>>>> expected duration soon (should within this week). >> > > > > > >>>>>>> >> > > > > > >>>>>>> >> > > > > > >>>>>>> -Rui >> > > > > > >>>>>>> >> > > > > > >>>>>>> On Fri, Nov 20, 2020 at 2:11 AM Stamatis Zampetakis < >> > > > > > >> [email protected] >> > > > > > >>>>>> >> > > > > > >>>>>>> wrote: >> > > > > > >>>>>>> >> > > > > > >>>>>>>> That would be great Vineet! >> > > > > > >>>>>>>> >> > > > > > >>>>>>>> @Julian, @Rui, @Vineet: >> > > > > > >>>>>>>> Can you share a small abstract (2-3 sentences) and >> > expected >> > > > > > >> duration? >> > > > > > >>>>>>>> Can you check if the date/times proposed previously [1] >> > work >> > > > for >> > > > > > >> you. >> > > > > > >>>>>> If >> > > > > > >>>>>>>> not feel free to propose another slot. >> > > > > > >>>>>>>> >> > > > > > >>>>>>>> Best, >> > > > > > >>>>>>>> Stamatis >> > > > > > >>>>>>>> >> > > > > > >>>>>>>> [1] https://s.apache.org/uhrzo >> > > > > > >>>>>>>> >> > > > > > >>>>>>>> On Thu, Nov 19, 2020 at 6:18 PM Vineet Garg < >> > [email protected] >> > > > > >> > > > > > >>>>> wrote: >> > > > > > >>>>>>>> >> > > > > > >>>>>>>>> I think this is a great idea. +1 for the online >> meetup. >> > > > > > >>>>>>>>> >> > > > > > >>>>>>>>> If there are slots left I can also talk about how Hive >> > > > > leverages >> > > > > > >>>>>>> Calcite >> > > > > > >>>>>>>> to >> > > > > > >>>>>>>>> do query optimization. >> > > > > > >>>>>>>>> >> > > > > > >>>>>>>>> -Vineet >> > > > > > >>>>>>>>> >> > > > > > >>>>>>>>> On Fri, Nov 6, 2020 at 7:21 AM Stamatis Zampetakis < >> > > > > > >>>>>> [email protected]> >> > > > > > >>>>>>>>> wrote: >> > > > > > >>>>>>>>> >> > > > > > >>>>>>>>>> Let's try to fix the date/time and tentative agenda >> so >> > that >> > > > we >> > > > > > >>>>> can >> > > > > > >>>>>>> add >> > > > > > >>>>>>>>> some >> > > > > > >>>>>>>>>> information on meetup [1]. >> > > > > > >>>>>>>>>> >> > > > > > >>>>>>>>>> So far we have three presenters, Julian, Rui, and >> > myself. We >> > > > > can >> > > > > > >>>>>>> start >> > > > > > >>>>>>>>> like >> > > > > > >>>>>>>>>> that and if in the process there are more people >> > interested >> > > > to >> > > > > > >>>>>> give a >> > > > > > >>>>>>>>> small >> > > > > > >>>>>>>>>> talk we can update the program. >> > > > > > >>>>>>>>>> >> > > > > > >>>>>>>>>> Let's try to get a date in the last two weeks of >> > January to >> > > > > give >> > > > > > >>>>>> us a >> > > > > > >>>>>>>> bit >> > > > > > >>>>>>>>>> more time to prepare. Personally, I don't have a >> > preference >> > > > > for >> > > > > > >>>>>> that >> > > > > > >>>>>>>>> being >> > > > > > >>>>>>>>>> a business day or not and I am in UTC+1. >> > > > > > >>>>>>>>>> For instance, how do you feel about Wednesday, 20 >> > January >> > > > > 2021, >> > > > > > >>>>>>>> 18:00:00 >> > > > > > >>>>>>>>> to >> > > > > > >>>>>>>>>> 21:00 UTC+1 [2] ? >> > > > > > >>>>>>>>>> >> > > > > > >>>>>>>>>> As soon as we have a rough estimate on the number of >> > > > attendees >> > > > > > we >> > > > > > >>>>>> can >> > > > > > >>>>>>>>> also >> > > > > > >>>>>>>>>> decide which platform to use for the event. >> > > > > > >>>>>>>>>> >> > > > > > >>>>>>>>>> Even if the number of participants ends up being low, >> > having >> > > > > new >> > > > > > >>>>>>>>>> material for our website is still a plus. >> > > > > > >>>>>>>>>> >> > > > > > >>>>>>>>>> Best, >> > > > > > >>>>>>>>>> Stamatis >> > > > > > >>>>>>>>>> >> > > > > > >>>>>>>>>> [1] https://www.meetup.com/Apache-Calcite/ >> > > > > > >>>>>>>>>> [2] https://s.apache.org/uhrzo >> > > > > > >>>>>>>>>> >> > > > > > >>>>>>>>>> Tentative Agenda >> > > > > > >>>>>>>>>> >> > > > > > >>>>>>>>>> Title: An introduction to query processing & Apache >> > Calcite >> > > > > > >>>>>>>>>> Speaker: Stamatis Zampetakis >> > > > > > >>>>>>>>>> Duration: 50min >> > > > > > >>>>>>>>>> Abstract: >> > > > > > >>>>>>>>>> In this talk, I will go over some basic notions >> around >> > query >> > > > > > >>>>>>> processors >> > > > > > >>>>>>>>> and >> > > > > > >>>>>>>>>> demonstrate how they map to concepts in Calcite. >> > > > > > >>>>>>>>>> I will start with some simple use-cases and show how >> > from >> > > > Java >> > > > > > >>>>> code >> > > > > > >>>>>>> we >> > > > > > >>>>>>>>> can >> > > > > > >>>>>>>>>> go to relational algebra and SQL, explaining the >> > importance >> > > > > of a >> > > > > > >>>>>>>>>> declarative language and the role of a query >> processing >> > > > > > >>>>> framework. >> > > > > > >>>>>>>>>> Then, I will focus on the query processor, >> illustrating >> > the >> > > > > > >>>>> general >> > > > > > >>>>>>>>>> architecture and the main components of Apache >> Calcite. >> > > > > > >>>>>>>>>> After a simple end to end example of the different >> > modules, >> > > > I >> > > > > > >>>>> will >> > > > > > >>>>>>>>> perform >> > > > > > >>>>>>>>>> a live coding session demonstrating how we can put >> > together >> > > > > the >> > > > > > >>>>>> main >> > > > > > >>>>>>>>>> components of Calcite to build a simple query >> processor >> > for >> > > > > > >>>>>> in-memory >> > > > > > >>>>>>>>>> data. >> > > > > > >>>>>>>>>> >> > > > > > >>>>>>>>>> >> > > > > > >>>>>>>>>> >> > > > > > >>>>>>>>>> On Thu, Oct 22, 2020 at 12:07 PM Danny Chan < >> > > > > > >>>>> [email protected]> >> > > > > > >>>>>>>>> wrote: >> > > > > > >>>>>>>>>> >> > > > > > >>>>>>>>>>> +1 for the online meeting, nice idea ~ >> > > > > > >>>>>>>>>>> >> > > > > > >>>>>>>>>>> Best, >> > > > > > >>>>>>>>>>> Danny Chan >> > > > > > >>>>>>>>>>> 在 2020年10月22日 +0800 PM5:58，JiaTao Tao < >> > [email protected] >> > > > > > >>>>>> ，写道： >> > > > > > >>>>>>>>>>>> I think it's a nice idea, hope to hear Julian's >> topic >> > > > about >> > > > > > >>>>>>>>> lattice/mv, >> > > > > > >>>>>>>>>>> we >> > > > > > >>>>>>>>>>>> have a big demand on this and want to learn more. >> > > > > > >>>>>>>>>>>> >> > > > > > >>>>>>>>>>>> >> > > > > > >>>>>>>>>>>> Regards! >> > > > > > >>>>>>>>>>>> >> > > > > > >>>>>>>>>>>> Aron Tao >> > > > > > >>>>>>>>>>>> >> > > > > > >>>>>>>>>>>> >> > > > > > >>>>>>>>>>>> Julian Hyde <[email protected]> 于2020年10月16日周五 >> > 下午12:50写道： >> > > > > > >>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>> Nice idea, Stamatis. I'm happy to give a talk if >> > people >> > > > > > >>>>> want >> > > > > > >>>>>> to >> > > > > > >>>>>>>>> hear >> > > > > > >>>>>>>>>>>>> it - possible topics include geospatial in >> Calcite, >> > quick >> > > > > > >>>>>> intro >> > > > > > >>>>>>>> to >> > > > > > >>>>>>>>>>>>> RelBuilder, and lattices/materialized views. >> > > > > > >>>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>> On Thu, Oct 15, 2020 at 10:35 AM Rui Wang < >> > > > > > >>>>>>> [email protected]> >> > > > > > >>>>>>>>>>> wrote: >> > > > > > >>>>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>>> I can give a small talk (10 to 20 mins) about >> > changes of >> > > > > > >>>>>>>> Calcite >> > > > > > >>>>>>>>> to >> > > > > > >>>>>>>>>>>>> support >> > > > > > >>>>>>>>>>>>>> streaming. >> > > > > > >>>>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>>> -Rui >> > > > > > >>>>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>>> On Thu, Oct 15, 2020 at 7:19 AM Alessandro >> > Solimando < >> > > > > > >>>>>>>>>>>>>> [email protected]> wrote: >> > > > > > >>>>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>>>> Hi Stamatis, >> > > > > > >>>>>>>>>>>>>>> that's a very nice idea, I am definitely >> > interested in >> > > > > > >>>>>>>>> attending >> > > > > > >>>>>>>>>> a >> > > > > > >>>>>>>>>>>>> meetup >> > > > > > >>>>>>>>>>>>>>> and hearing presentations around Calcite. >> > > > > > >>>>>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>>>> Best regards, >> > > > > > >>>>>>>>>>>>>>> Alessandro >> > > > > > >>>>>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>>>> On Thu, 15 Oct 2020 at 15:09, Stamatis >> Zampetakis < >> > > > > > >>>>>>>>>>> [email protected]> >> > > > > > >>>>>>>>>>>>>>> wrote: >> > > > > > >>>>>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>>>>> Hi guys, >> > > > > > >>>>>>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>>>>> How do you feel about participating in an >> online >> > > > > > >>>>> meetup >> > > > > > >>>>>>> for >> > > > > > >>>>>>>>>>> Calcite >> > > > > > >>>>>>>>>>>>> in >> > > > > > >>>>>>>>>>>>>>>> January 2021? >> > > > > > >>>>>>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>>>>> It's been forever since we organised a Calcite >> > meetup >> > > > > > >>>>>> and >> > > > > > >>>>>>>>> with >> > > > > > >>>>>>>>>>> the >> > > > > > >>>>>>>>>>>>>>> current >> > > > > > >>>>>>>>>>>>>>>> situation (pandemic) it will be almost >> impossible >> > to >> > > > > > >>>>>> hold >> > > > > > >>>>>>>> one >> > > > > > >>>>>>>>>> in >> > > > > > >>>>>>>>>>>>> person >> > > > > > >>>>>>>>>>>>>>> in >> > > > > > >>>>>>>>>>>>>>>> the near future. >> > > > > > >>>>>>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>>>>> Nevertheless, people now more than ever tend to >> > > > > > >>>>>> organise >> > > > > > >>>>>>>> and >> > > > > > >>>>>>>>>>> attend >> > > > > > >>>>>>>>>>>>> such >> > > > > > >>>>>>>>>>>>>>>> events so we could take advantage of the >> > situation to >> > > > > > >>>>>>>>> exchange >> > > > > > >>>>>>>>>>> ideas, >> > > > > > >>>>>>>>>>>>>>> learn >> > > > > > >>>>>>>>>>>>>>>> new things, and meet each other in a more >> > interactive >> > > > > > >>>>>>> way. >> > > > > > >>>>>>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>>>>> We can have a few presentations and slots for >> open >> > > > > > >>>>>>>> discussion >> > > > > > >>>>>>>>>>> among >> > > > > > >>>>>>>>>>>>> us. >> > > > > > >>>>>>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>>>>> The subject can be anything from something very >> > > > > > >>>>>> technical >> > > > > > >>>>>>>> to >> > > > > > >>>>>>>>> a >> > > > > > >>>>>>>>>>> very >> > > > > > >>>>>>>>>>>>>>> simple >> > > > > > >>>>>>>>>>>>>>>> presentation of an adapter, the use of calcite >> in >> > a >> > > > > > >>>>>>>>> university >> > > > > > >>>>>>>>>>>>> course, in >> > > > > > >>>>>>>>>>>>>>>> academia, or whatever else you can imagine. >> > > > > > >>>>>>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>>>>> The duration can be also flexible, ranging >> from a >> > few >> > > > > > >>>>>>>> minutes >> > > > > > >>>>>>>>>> to >> > > > > > >>>>>>>>>>> an >> > > > > > >>>>>>>>>>>>> hour >> > > > > > >>>>>>>>>>>>>>> or >> > > > > > >>>>>>>>>>>>>>>> more depending on the courage of the speaker. >> > > > > > >>>>>>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>>>>> I'm sure most of us have some slides here and >> > there >> > > > > > >>>>>> that >> > > > > > >>>>>>>>> could >> > > > > > >>>>>>>>>>> feed a >> > > > > > >>>>>>>>>>>>>>> small >> > > > > > >>>>>>>>>>>>>>>> presentation around Calcite so let's make this >> > > > > > >>>>> happen! >> > > > > > >>>>>>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>>>>> So are there people interested to give a talk >> > around >> > > > > > >>>>>>>> Calcite? >> > > > > > >>>>>>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>>>>> Personally, I can give a presentation on very >> > basic >> > > > > > >>>>>> stuff >> > > > > > >>>>>>>> on >> > > > > > >>>>>>>>>>> query >> > > > > > >>>>>>>>>>>>>>>> optimization and Calcite showing a bit of >> > motivation >> > > > > > >>>>>> and >> > > > > > >>>>>>>>> going >> > > > > > >>>>>>>>>>>>> through >> > > > > > >>>>>>>>>>>>>>> the >> > > > > > >>>>>>>>>>>>>>>> main APIs with examples and code samples. >> > > > > > >>>>>>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>>>>> Apart from speakers, are there people >> interested >> > in >> > > > > > >>>>>>>> attending >> > > > > > >>>>>>>>>>> such >> > > > > > >>>>>>>>>>>>>>> meetups? >> > > > > > >>>>>>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>>>>> We can fix the date and time based on the >> region >> > of >> > > > > > >>>>> the >> > > > > > >>>>>>>>>> majority. >> > > > > > >>>>>>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>>>>> Best, >> > > > > > >>>>>>>>>>>>>>>> Stamatis >> > > > > > >>>>>>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>>>> >> > > > > > >>>>>>>>>>>>> >> > > > > > >>>>>>>>>>> >> > > > > > >>>>>>>>>> >> > > > > > >>>>>>>>> >> > > > > > >>>>>>>> >> > > > > > >>>>>>> >> > > > > > >>>>>> >> > > > > > >>>>> >> > > > > > >> >> > > > > > >> > > > > > >> > > > > >> > > > >> > >> >
