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https://issues.apache.org/jira/browse/SPARK-2155?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zongheng Yang updated SPARK-2155:
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Description: Currently we translate CASE KEY WHEN to CASE WHEN, hence
incurring redundant evaluations of the key expression. Relevant discussions
here: https://github.com/apache/spark/pull/1055/files#r13784248 (was:
Currently we translate CASE KEY WHEN to CASE WHEN, hence incurring redundant
evaluations of the key expression. Relevant discussions here:
https://github.com/apache/spark/pull/1055/files#r13784248)
> Support effectful / non-deterministic key expressions in CASE WHEN statements
> -----------------------------------------------------------------------------
>
> Key: SPARK-2155
> URL: https://issues.apache.org/jira/browse/SPARK-2155
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Zongheng Yang
>
> Currently we translate CASE KEY WHEN to CASE WHEN, hence incurring redundant
> evaluations of the key expression. Relevant discussions here:
> https://github.com/apache/spark/pull/1055/files#r13784248
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