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https://issues.apache.org/jira/browse/SPARK-13981?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-13981:
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Assignee: Apache Spark
> Improve Filter generated code to defer variable evaluation within operator
> --------------------------------------------------------------------------
>
> Key: SPARK-13981
> URL: https://issues.apache.org/jira/browse/SPARK-13981
> Project: Spark
> Issue Type: Improvement
> Reporter: Nong Li
> Assignee: Apache Spark
> Priority: Minor
>
> We can improve the generated filter code by deferring evaluating variables
> until just before they are needed.
> For example. x > 1 and y > b
> we can do
> {code}
> x = ...
> if (x <= 1) continue
> y = ...
> {code}
> instead of currently where we do
> {code}
> x = ...
> y = ...
> if (x <= 1) continue
> ...
> {code}
> This is helpful if evaluating y has any cost.
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