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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2021/12/14 20:31:24 UTC

[GitHub] [beam] zhoufek opened a new pull request #16235: [BEAM-12697] Add basics for SBE schema

zhoufek opened a new pull request #16235:
URL: https://github.com/apache/beam/pull/16235


   This isn't really usable yet. It's just to get things started and establish one of the major restrictions on constructing it.
   
   Schema generation and the `PayloadSerializer` will be handled in future PRs. This is just to get the foundation set.
   ------------------------
   
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   `ValidatesRunner` compliance status (on master branch)
   --------------------------------------------------------
   
   <table>
     <thead>
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         <th>Lang</th>
         <th>ULR</th>
         <th>Dataflow</th>
         <th>Flink</th>
         <th>Samza</th>
         <th>Spark</th>
         <th>Twister2</th>
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         <td>---</td>
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           <a href="https://ci-beam.apache.org/job/beam_PostCommit_Go/lastCompletedBuild/">
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         <td>---</td>
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         <td>---</td>
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           <a href="https://ci-beam.apache.org/job/beam_PostCommit_Py_VR_Dataflow/lastCompletedBuild/">
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         <td>---</td>
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           <a href="https://ci-beam.apache.org/job/beam_PostCommit_XVR_Direct/lastCompletedBuild/">
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   Examples testing status on various runners
   --------------------------------------------------------
   
   <table>
     <thead>
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         <th>Lang</th>
         <th>ULR</th>
         <th>Dataflow</th>
         <th>Flink</th>
         <th>Samza</th>
         <th>Spark</th>
         <th>Twister2</th>
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         <td>Go</td>
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         <td>Java</td>
         <td>---</td>
         <td>
           <a href="https://ci-beam.apache.org/job/beam_PreCommit_Java_Examples_Dataflow_Cron/lastCompletedBuild/">
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         <td>---</td>
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         <td>---</td>
         <td>---</td>
         <td>---</td>
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         <td>XLang</td>
         <td>---</td>
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         <td>---</td>
         <td>---</td>
         <td>---</td>
       </tr>
     </tbody>
   </table>
   
   Post-Commit SDK/Transform Integration Tests Status (on master branch)
   ------------------------------------------------------------------------------------------------
   
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         <th>Go</th>
         <th>Java</th>
         <th>Python</th>
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         <td>
           <a href="https://ci-beam.apache.org/job/beam_PostCommit_Go/lastCompletedBuild/">
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   Pre-Commit Tests Status (on master branch)
   ------------------------------------------------------------------------------------------------
   
   <table>
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         <th>---</th>
         <th>Java</th>
         <th>Python</th>
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         <th>Typescript</th>
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         <td>Portable</td>
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         </td>
         <td>---</td>
         <td>---</td>
         <td>---</td>
       </tr>
     </tbody>
   </table>
   
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[GitHub] [beam] zhoufek commented on pull request #16235: [BEAM-12697] Add basics for SBE schema

Posted by GitBox <gi...@apache.org>.
zhoufek commented on pull request #16235:
URL: https://github.com/apache/beam/pull/16235#issuecomment-994951036


   R: @TheNeuralBit


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[GitHub] [beam] zhoufek commented on pull request #16235: [BEAM-12697] Add basics for SBE schema

Posted by GitBox <gi...@apache.org>.
zhoufek commented on pull request #16235:
URL: https://github.com/apache/beam/pull/16235#issuecomment-1031899442


   I'm basically replacing this with PR #16762


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[GitHub] [beam] aaltay commented on pull request #16235: [BEAM-12697] Add basics for SBE schema

Posted by GitBox <gi...@apache.org>.
aaltay commented on pull request #16235:
URL: https://github.com/apache/beam/pull/16235#issuecomment-1011691986


   @zhoufek @TheNeuralBit - what is the next step on this PR?


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[GitHub] [beam] TheNeuralBit commented on pull request #16235: [BEAM-12697] Add basics for SBE schema

Posted by GitBox <gi...@apache.org>.
TheNeuralBit commented on pull request #16235:
URL: https://github.com/apache/beam/pull/16235#issuecomment-1012460166


   Hey @zhoufek sorry for the delay. I'm still not entirely clear on why this is necessary, and right now I'm just inclined to hold off until more of the implementation is ready which could clarify that. Alternatively, maybe we could just have a chat offline to discuss this -  if that makes sense could you schedule something?


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[GitHub] [beam] zhoufek commented on pull request #16235: [BEAM-12697] Add basics for SBE schema

Posted by GitBox <gi...@apache.org>.
zhoufek commented on pull request #16235:
URL: https://github.com/apache/beam/pull/16235#issuecomment-995856066


   > I'm not clear on why we need this, can't we use the Beam schema builder, and have it's field order be the same as the SBE schema's field order?
   
   One thing I know is going to be added is semantic type mapping. SBE XML schemas allow for a "semanticType" attribute on a field, and outside of a direct field mapping, as done in this PR, that's the best way to detect certain logical types (e.g. UTCTimestamp). Otherwise, we have little way to distinguish types with unique semantic meanings. More on that is [here](https://www.fixtrading.org/standards/sbe-online/#field-aspects). That could just be another set of overloaded methods, but at a point, it seems like the builder pattern done here will be cleaner, especially if anything new comes up.
   
   I'm also planning to generate the `PayloadSerializer` at build time, and this method will clearly keep that in line with how the schema is generated (stubs, IR, or XML). Since there are some benefits and limitations between stubs and IR/XML, that seems like it will minimize unexpected behavior.


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[GitHub] [beam] zhoufek commented on pull request #16235: [BEAM-12697] Add basics for SBE schema

Posted by GitBox <gi...@apache.org>.
zhoufek commented on pull request #16235:
URL: https://github.com/apache/beam/pull/16235#issuecomment-1012158952


   I'm still waiting for more feedback. I think this PR just got lost amid vacations.


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[GitHub] [beam] TheNeuralBit commented on pull request #16235: [BEAM-12697] Add basics for SBE schema

Posted by GitBox <gi...@apache.org>.
TheNeuralBit commented on pull request #16235:
URL: https://github.com/apache/beam/pull/16235#issuecomment-995331130


   I'm not clear on why we need this, can't we use the Beam schema builder, and have it's field order be the same as the SBE schema's field order?


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[GitHub] [beam] zhoufek closed pull request #16235: [BEAM-12697] Add basics for SBE schema

Posted by GitBox <gi...@apache.org>.
zhoufek closed pull request #16235:
URL: https://github.com/apache/beam/pull/16235


   


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[GitHub] [beam] zhoufek commented on pull request #16235: [BEAM-12697] Add basics for SBE schema

Posted by GitBox <gi...@apache.org>.
zhoufek commented on pull request #16235:
URL: https://github.com/apache/beam/pull/16235#issuecomment-994911312


   Run Java PreCommit


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