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From "Andrus Adamchik (JIRA)" <j...@apache.org>
Subject [jira] Reopened: (CAY-1380) Support for Escaped LIKE Clauses in Expressions
Date Fri, 09 Apr 2010 17:06:50 GMT

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

Andrus Adamchik reopened CAY-1380:
----------------------------------

      Assignee: Andrus Adamchik

reopening to change fix version

> 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
>            Assignee: Andrus Adamchik
>             Fix For: 3.0.1, 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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