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Posted to issues@spark.apache.org by "Eric Fu (JIRA)" <ji...@apache.org> on 2018/07/27 03:06:00 UTC

[jira] [Updated] (SPARK-24932) Allow update mode for streaming queries with join

     [ https://issues.apache.org/jira/browse/SPARK-24932?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Eric Fu updated SPARK-24932:
----------------------------
    Description: 
In issue SPARK-19140 we supported update output mode for non-aggregation streaming queries. This should also be applied to streaming join to keep semantic consistent.

PS. Streaming join feature is added after SPARK-19140. 

When using update _output_ mode the join will works exactly as _append_ mode. However, for example, this will allow user to run an aggregation-after-join query in update mode in order to get a more real-time result output.



  was:
In issue SPARK-19140 we supported update output mode for non-aggregation streaming queries. This should also be applied to streaming join to keep semantic consistent.

PS. Streaming join feature is added after SPARK-19140. 


> Allow update mode for streaming queries with join
> -------------------------------------------------
>
>                 Key: SPARK-24932
>                 URL: https://issues.apache.org/jira/browse/SPARK-24932
>             Project: Spark
>          Issue Type: Improvement
>          Components: Structured Streaming
>    Affects Versions: 2.3.0, 2.3.1
>            Reporter: Eric Fu
>            Priority: Major
>
> In issue SPARK-19140 we supported update output mode for non-aggregation streaming queries. This should also be applied to streaming join to keep semantic consistent.
> PS. Streaming join feature is added after SPARK-19140. 
> When using update _output_ mode the join will works exactly as _append_ mode. However, for example, this will allow user to run an aggregation-after-join query in update mode in order to get a more real-time result output.



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