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https://issues.apache.org/jira/browse/SPARK-26249?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16706720#comment-16706720
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Sunitha Kambhampati commented on SPARK-26249:
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I will post a PR soon.
> Extension Points Enhancements to inject a rule in order and to add a batch
> --------------------------------------------------------------------------
>
> Key: SPARK-26249
> URL: https://issues.apache.org/jira/browse/SPARK-26249
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: Sunitha Kambhampati
> Priority: Major
>
> +Motivation:+
> Spark has extension points API to allow third parties to extend Spark with
> custom optimization rules. The current API does not allow fine grain control
> on when the optimization rule will be exercised.
> In our use cases, we have optimization rules that we want to add as
> extensions to a batch in a specific order.
> In the current API, there is no way to add a batch to the optimization using
> the SparkSessionExtensions API, similar to the postHocOptimizationBatches in
> SparkOptimizer.
> +Proposal:+
> Add 2 new API's to the existing Extension Points to allow for more
> flexibility for third party users of Spark.
> # Inject a optimizer rule to a batch in order
> # Inject a optimizer batch in order
> The design spec is here:
> [https://drive.google.com/file/d/1m7rQZ9OZFl0MH5KS12CiIg3upLJSYfsA/view?usp=sharing]
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