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https://issues.apache.org/jira/browse/HIVE-12092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15049247#comment-15049247
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Gunther Hagleitner commented on HIVE-12092:
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In your example above you say: x like "https:%" -> x >= "https:". Doesn't it
also guarantee that: x < "https;" and if so wouldn't that narrow the space
further?
> 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: 1.3.0, 2.0.0
> 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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