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From "Apache Spark (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (SPARK-28237) Add a new batch strategy called Idempotent to catch potential bugs in corresponding rules
Date Tue, 02 Jul 2019 23:49:00 GMT

     [ https://issues.apache.org/jira/browse/SPARK-28237?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Apache Spark reassigned SPARK-28237:
------------------------------------

    Assignee:     (was: Apache Spark)

> Add a new batch strategy called Idempotent to catch potential bugs in corresponding rules
> -----------------------------------------------------------------------------------------
>
>                 Key: SPARK-28237
>                 URL: https://issues.apache.org/jira/browse/SPARK-28237
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.0.0
>            Reporter: Yesheng Ma
>            Priority: Major
>
> The current {{RuleExecutor}} system contains two kinds of strategies: {{Once}} and {{FixedPoint}}.
The {{Once}} strategy is supposed to run once. However, for particular rules (e.g. PullOutNondeterministic),
they are designed to be idempotent, but Spark currently lacks corresponding mechanism to prevent
such kind of non-idempotent behavior from happening.



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