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From "Andrew Lindesay (JIRA)" <j...@apache.org>
Subject [jira] Updated: (CAY-1380) Support for Escaped LIKE Clauses in Expressions
Date Fri, 29 Jan 2010 17:06:34 GMT

     [ https://issues.apache.org/jira/browse/CAY-1380?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Lindesay updated CAY-1380:
---------------------------------

    Attachment: patch-for-like-escaping-29jan2010.diff

Patch file.

> Support for Escaped LIKE Clauses in Expressions
> -----------------------------------------------
>
>                 Key: CAY-1380
>                 URL: https://issues.apache.org/jira/browse/CAY-1380
>             Project: Cayenne
>          Issue Type: New Feature
>    Affects Versions: 3.1M1
>            Reporter: Andrew Lindesay
>         Attachments: patch-for-like-escaping-29jan2010.diff
>
>
> At present in Cayenne, by using Expressions, it is not possible to escape LIKE clauses.
 So if somebody enters FOO%BAR into a client all you can do is to strip out the %.  This is
a bit tricky to work around.  The JDBC approach is allow you to append some extra text to
the operand in order to define an escape character like this;
> SELECT a FROM tabA WHERE a LIKE '%=_' {escape '='}
> So, I added an instance variable to "PatternMatchNode" to carry the escape char and then
modified "QueryAssemblerHelper" to append this to the operand if it is present.  See attached
patch

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