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Posted to dev@hive.apache.org by "Navis (JIRA)" <ji...@apache.org> on 2013/03/21 06:29:15 UTC
[jira] [Commented] (HIVE-4209) Cache evaluation result of
deterministic expression and reuse it
[ https://issues.apache.org/jira/browse/HIVE-4209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13608650#comment-13608650 ]
Navis commented on HIVE-4209:
-----------------------------
Applied to SEL and FIL operator. Running test.
> Cache evaluation result of deterministic expression and reuse it
> ----------------------------------------------------------------
>
> Key: HIVE-4209
> URL: https://issues.apache.org/jira/browse/HIVE-4209
> Project: Hive
> Issue Type: Improvement
> Components: Query Processor
> Reporter: Navis
> Assignee: Navis
> Priority: Minor
> Attachments: HIVE-4209.D9585.1.patch
>
>
> For example,
> {noformat}
> select key from src where key + 1 > 100 AND key + 1 < 200 limit 3;
> {noformat}
> key + 1 need not to be evaluated twice.
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