[jira] [Work logged] (BEAM-9624) Combine operation should support only converting to accumulators

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/BEAM-9624?focusedWorklogId=413632&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-413632 ]

ASF GitHub Bot logged work on BEAM-9624:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 01/Apr/20 00:21
            Start Date: 01/Apr/20 00:21
    Worklog Time Spent: 10m 
      Work Description: acrites commented on pull request #11271: [BEAM-9624] Adds Convert to Accumulators operator for use in combiner lifting for streaming pipelines
URL: https://github.com/apache/beam/pull/11271#discussion_r401288240
 
 

 ##########
 File path: runners/core-construction-java/src/main/java/org/apache/beam/runners/core/construction/PTransformTranslation.java
 ##########
 @@ -101,6 +101,8 @@
       "beam:transform:combine_per_key_merge_accumulators:v1";
   public static final String COMBINE_PER_KEY_EXTRACT_OUTPUTS_TRANSFORM_URN =
       "beam:transform:combine_per_key_extract_outputs:v1";
+  public static final String COMBINE_PER_KEY_CONVERT_TO_ACCUMULATORS_TRANSFORM_URN =
 
 Review comment:
   Done!
 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 413632)
    Time Spent: 1h  (was: 50m)

> Combine operation should support only converting to accumulators
> ----------------------------------------------------------------
>
>                 Key: BEAM-9624
>                 URL: https://issues.apache.org/jira/browse/BEAM-9624
>             Project: Beam
>          Issue Type: Improvement
>          Components: runner-core
>            Reporter: Andrew Crites
>            Assignee: Andrew Crites
>            Priority: Major
>          Time Spent: 1h
>  Remaining Estimate: 0h
>
> For streaming pipelines, we want to be able to lift the combiner into the MergeBuckets without having to also do a PartialGroupByKey before the shuffle. We don't want to do the PGBK since it could cause non-deterministic results when used with some triggers.
> We propose adding a new URN for doing just the convert to accumulators step and adding support for it in Java/Python/Go.



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