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https://issues.apache.org/jira/browse/DRILL-1299?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jinfeng Ni updated DRILL-1299:
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Attachment: 0001-DRILL-1299-Enable-short-circuit-evaluation-for-case-.patch
> Short circuit CASE statement evaluation
> ---------------------------------------
>
> Key: DRILL-1299
> URL: https://issues.apache.org/jira/browse/DRILL-1299
> Project: Apache Drill
> Issue Type: Improvement
> Components: Execution - Codegen
> Reporter: Jason Altekruse
> Assignee: Jinfeng Ni
> Fix For: 0.5.0
>
> Attachments:
> 0001-DRILL-1299-Enable-short-circuit-evaluation-for-case-.patch
>
>
> Case statements currently are transformed into generated code that contains
> blocks for the conditional, when block and else block. Regardless of the
> result of the conditional, both of the blocks are evaluated and the correct
> result is taken. This currently removes the capability for case statements to
> be used to avoid exceptions, such as checking for an empty string before
> calling a function on it.
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