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From "Zheng Shao (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-236) RLIKE/REGEXP should allow matching partial strings
Date Mon, 05 Oct 2009 19:12:31 GMT

    [ https://issues.apache.org/jira/browse/HIVE-236?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12762314#action_12762314
] 

Zheng Shao commented on HIVE-236:
---------------------------------

@HIVE-236.2.patch:

The warning should not be outputted for every call - we had seen problems with too many repeated
log messages that filled up the log file.
Can you add a boolean variable "warned", so that we only warn once?

Also, it may help if you put all the test cases in a single query. That helps to reduce the
time of running tests.


> RLIKE/REGEXP should allow matching partial strings
> --------------------------------------------------
>
>                 Key: HIVE-236
>                 URL: https://issues.apache.org/jira/browse/HIVE-236
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Zheng Shao
>            Assignee: Paul Yang
>         Attachments: HIVE-236.1.patch, HIVE-236.2.patch
>
>
> The current behavior is that the regexp needs to match the whole string.
> But from mysql: ( http://dev.mysql.com/doc/refman/5.0/en/regexp.html#operator_regexp
)
> mysql> SELECT 'fofo' REGEXP '^fo';                      -> 1
> We need to make it work the same way as MySQL.

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