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https://issues.apache.org/jira/browse/HIVE-4209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14052196#comment-14052196
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Lefty Leverenz commented on HIVE-4209:
--------------------------------------
*hive.cache.expr.evaluation* is documented in the wiki here:
* [Configuration Properties -- hive.cache.expr.evaluation |
https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-hive.cache.expr.evaluation]
I also added a comment to HIVE-6586 explaining that the current patch for
HIVE-6037 (HIVE-6037-0.13.0) truncates the description of
*hive.cache.expr.evaluation*.
> 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
> Fix For: 0.12.0
>
> Attachments: HIVE-4209.6.patch.txt, HIVE-4209.D9585.1.patch,
> HIVE-4209.D9585.2.patch, HIVE-4209.D9585.3.patch, HIVE-4209.D9585.4.patch,
> HIVE-4209.D9585.5.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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