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https://issues.apache.org/jira/browse/SPARK-22263?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16201568#comment-16201568
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Apache Spark commented on SPARK-22263:
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User 'gengliangwang' has created a pull request for this issue:
https://github.com/apache/spark/pull/19478
> Refactor deterministic as lazy value
> ------------------------------------
>
> Key: SPARK-22263
> URL: https://issues.apache.org/jira/browse/SPARK-22263
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.2.0
> Reporter: Gengliang Wang
> Priority: Critical
>
> The method `deterministic` is frequently called in optimizer.
> Refactor `deterministic` as lazy value, in order to avoid redundant
> computations.
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