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Posted to issues@hive.apache.org by "Gopal V (JIRA)" <ji...@apache.org> on 2016/02/24 05:57:18 UTC
[jira] [Updated] (HIVE-12092) SARGS: UDFLike prefix cases needs to
be translated into >= sargs
[ https://issues.apache.org/jira/browse/HIVE-12092?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Gopal V updated HIVE-12092:
---------------------------
Status: Open (was: Patch Available)
Revisiting idea as a general UDF -> SARGs interface.
> SARGS: UDFLike prefix cases needs to be translated into >= sargs
> ----------------------------------------------------------------
>
> Key: HIVE-12092
> URL: https://issues.apache.org/jira/browse/HIVE-12092
> Project: Hive
> Issue Type: Improvement
> Components: Logical Optimizer
> Affects Versions: 2.0.0, 1.3.0
> Reporter: Gopal V
> Assignee: Gopal V
> Attachments: HIVE-12092.1.patch, HIVE-12092.2.patch, HIVE-12092.3.patch
>
>
> A query which follows the following format
> {{select * from table where access_url like "https:%" ;}}
> needs to rewrite SARGs as
> {{access_url >= 'https:'}}
> to get a significant hit-rate on a simple expression.
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