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From "Shreyas Kaushik (JIRA)" <derby-...@db.apache.org>
Subject [jira] Commented: (DERBY-20) LIKE handles strings with control characters incorrectly.
Date Thu, 03 Feb 2005 05:42:17 GMT
     [ http://issues.apache.org/jira/browse/DERBY-20?page=comments#action_58547 ]
     
Shreyas Kaushik commented on DERBY-20:
--------------------------------------

A more clear comment here would be useful.

Clear meaning, what is the use case that you are talking about here? A small example of the
behaviour with expcted output vs. current output would help.

> LIKE handles strings with control characters incorrectly.
> ---------------------------------------------------------
>
>          Key: DERBY-20
>          URL: http://issues.apache.org/jira/browse/DERBY-20
>      Project: Derby
>         Type: Bug
>   Components: SQL
>     Versions: 10.0.2.0
>     Reporter: Tulika Agrawal
>     Priority: Minor

>
> Reporting for Daniel John Debrunner.
> If a string contains control characters in the regions matched 
> by wild card characters then in some situations a LIKE will 
> return false instead of true and the row will not be returned.
> Caused by the dynamic like optimization using >= with a prefix 
> which is is equivalent to >= on the prefeix appended with 
> blanks and not null (\u0000) characters.

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