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Posted to issues@spark.apache.org by "Hyukjin Kwon (JIRA)" <ji...@apache.org> on 2019/07/20 07:33:00 UTC

[jira] [Assigned] (SPARK-27815) do not leak SaveMode to file source v2

     [ https://issues.apache.org/jira/browse/SPARK-27815?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hyukjin Kwon reassigned SPARK-27815:
------------------------------------

    Assignee: Yesheng Ma

> do not leak SaveMode to file source v2
> --------------------------------------
>
>                 Key: SPARK-27815
>                 URL: https://issues.apache.org/jira/browse/SPARK-27815
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.0.0
>            Reporter: Wenchen Fan
>            Assignee: Yesheng Ma
>            Priority: Major
>             Fix For: 3.0.0
>
>
> The current catalyst optimizer's predicate pushdown is divided into two separate rules: PushDownPredicate and PushThroughJoin. This is not efficient for optimizing cascading joins such as TPC-DS q64, where a whole default batch is re-executed just due to this. We need a more efficient approach to pushdown predicate as much as possible in a single pass.



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