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https://issues.apache.org/jira/browse/TRAFODION-2353?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15687225#comment-15687225
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ASF GitHub Bot commented on TRAFODION-2353:
-------------------------------------------

Github user DaveBirdsall commented on a diff in the pull request:

    https://github.com/apache/incubator-trafodion/pull/842#discussion_r89157897
  
    --- Diff: core/sql/optimizer/BindItemExpr.cpp ---
    @@ -6451,7 +6452,13 @@ NABoolean Like::beginEndKeysApplied(CollHeap *heap)
     
       return beginEndKeysApplied_;
     
    -} // Like::beginEndKeysApplied()
    +} // PatternMatchingFunction::beginEndKeysApplied()
    +
    +ItemExpr *Regexp::applyBeginEndKeys(BindWA *bindWA, ItemExpr *boundExpr,
    +                             CollHeap *heap)
    +{
    +  return boundExpr;
    --- End diff --
    
    This is the place where we should add a check for non-default collating 
sequence, and raise error 4392 if found.


> support of the regexp operator
> ------------------------------
>
>                 Key: TRAFODION-2353
>                 URL: https://issues.apache.org/jira/browse/TRAFODION-2353
>             Project: Apache Trafodion
>          Issue Type: New Feature
>            Reporter: liu ming
>            Assignee: liu ming
>
> It is desired to have REGEXP.
> Some initial researching already done in: 
> https://cwiki.apache.org/confluence/display/TRAFODION/Example+Enhancement%3A+Add+a+New+Built-in+Function
> This JIRA is to add REGEXP operator, not including functions may required 
> future, if required, related JIRA will be created.
> The good advice in the wiki is to do new features incrementally. 



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