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https://issues.apache.org/jira/browse/TRAFODION-2404?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16585107#comment-16585107
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ASF GitHub Bot commented on TRAFODION-2404:
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GitHub user traflm opened a pull request:
https://github.com/apache/trafodion/pull/1699
[TRAFODION-2404] enhance the regexpr performance
Previously, each time evaluate a row, it needs to invoke the regcomp(), by
this change, only when the pattern is changed, invoke the regcomp()
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/traflm/trafodion TRAFODION-2404
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/trafodion/pull/1699.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1699
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commit cadd9e90526a5b857912805894d17d2bb1f5e8de
Author: Liu Ming <ovis_poly@...>
Date: 2018-08-19T08:49:07Z
first check in, must switch to other task
commit c41d24b8c73cc583c13e978e76ffb3ac2391d9a1
Author: Liu Ming <ovis_poly@...>
Date: 2018-08-19T10:13:04Z
enhance by adding comments and adding error check
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> enhance REGEXP performance
> --------------------------
>
> Key: TRAFODION-2404
> URL: https://issues.apache.org/jira/browse/TRAFODION-2404
> Project: Apache Trafodion
> Issue Type: Improvement
> Reporter: liu ming
> Assignee: liu ming
> Priority: Major
>
> There are rooms to enhance the performance of REGEXP from code review
> comments by Dave Birdsall. More details will be added.
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