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https://issues.apache.org/jira/browse/HIVE-4070?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13585944#comment-13585944
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Sean Mackrory commented on HIVE-4070:
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Though admittedly it was a question of mine trying to clarify HiveQL that
spawned this thought, I don't necessarily think HiveQL's LIKE operator _should_
be case insensitive. It would certainly make HiveQL more consistent with SQL if
it was, but when running extremely long queries over certain types of data, I
could see it being a nice feature that LIKE gives you the flexibility of
wild-cards without the overhead of case insensitivity. There's always the
option of using RLIKE when one is looking for a very flexible match, but I
think this is a toss-up between compliance with SQL's behavior and being able
to limit the overhead of the query when possible.
> Like operator in Hive is case sensitive while in MySQL (and most likely other
> DBs) it's case sensitive
> ------------------------------------------------------------------------------------------------------
>
> Key: HIVE-4070
> URL: https://issues.apache.org/jira/browse/HIVE-4070
> Project: Hive
> Issue Type: Bug
> Components: UDF
> Affects Versions: 0.10.0
> Reporter: Mark Grover
> Assignee: Mark Grover
> Fix For: 0.11.0
>
>
> Hive's like operator seems to be case sensitive.
> See
> https://github.com/apache/hive/blob/trunk/ql/src/java/org/apache/hadoop/hive/ql/udf/UDFLike.java#L164
> However, MySQL's like operator is case insensitive. I don't have other DB's
> (like PostgreSQL) installed and handy but I am guessing their LIKE is case
> insensitive as well.
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