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https://issues.apache.org/jira/browse/DRILL-2406?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14353703#comment-14353703
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Jason Altekruse commented on DRILL-2406:
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Part 1 (previously 2060 part 1) https://reviews.apache.org/r/31567/
> Fix expression interpreter to allow executing expressions at planning time
> --------------------------------------------------------------------------
>
> Key: DRILL-2406
> URL: https://issues.apache.org/jira/browse/DRILL-2406
> Project: Apache Drill
> Issue Type: Improvement
> Reporter: Jason Altekruse
> Assignee: Jason Altekruse
> Priority: Critical
> Fix For: 0.8.0
>
> Attachments:
> DRILL-2406-part1-planning-time-expression-evaulutation.patch,
> DRILL-2406-part2-planning-time-expression-evaulutation.diff
>
>
> The expression interpreter currently available in Drill cannot be used at
> planning time, as it does not have a means to connect to the direct memory
> allocator stored at the DrillbitContext level. To implement new rules based
> on evaluating expressions on constants, or small datasets, such as partition
> information this limitation must be addressed.
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