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From "Andrew Lindesay (JIRA)" <j...@apache.org>
Subject [jira] Updated: (CAY-1380) Support for Escaped LIKE Clauses in Expressions
Date Sun, 04 Apr 2010 13:08:27 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-CAY1380.diff

I have back-ported the patch for CAY-1380 to be applied to "STABLE-3.0".  This is now attached
to the ticket CAY-1380.  I have checked my own test-case which doesn't also need CAY-1402
and it appears to work fine.  Can you please check this and then apply to STABLE-3.0 for me.
 I am a little confused by SVN commit #905112 which is related to CAY-1380; I may need you
to back-port this to "STABLE-3.0".

> 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
>             Fix For: 3.1M1
>
>         Attachments: CAY1380-patch-31jan2010-1405.diff, patch-CAY1380.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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