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From "Thejas M Nair (JIRA)" <j...@apache.org>
Subject [jira] Updated: (PIG-1770) matches clause problem with chars that have special meaning in dk.brics - #, @ ..
Date Wed, 02 Mar 2011 16:45:41 GMT

     [ https://issues.apache.org/jira/browse/PIG-1770?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Thejas M Nair updated PIG-1770:
-------------------------------

    Fix Version/s: 0.9.0
           Status: Patch Available  (was: Open)

> matches clause problem with chars that have special meaning in dk.brics - #, @ ..
> ---------------------------------------------------------------------------------
>
>                 Key: PIG-1770
>                 URL: https://issues.apache.org/jira/browse/PIG-1770
>             Project: Pig
>          Issue Type: Bug
>          Components: impl
>    Affects Versions: 0.8.0
>            Reporter: Thejas M Nair
>            Assignee: Thejas M Nair
>             Fix For: 0.9.0, 0.8.0
>
>         Attachments: PIG-1770.1.patch
>
>
> When special chars #, @ , and the 'optional' patterns described here - http://www.brics.dk/automaton/doc/dk/brics/automaton/RegExp.html#RegExp%28java.lang.String%29
are used , the regex match fails to work. 
> This is related to  PIG-965.
> Example and workaround are as follows -
> {code}
> grunt> cat t.txt                           
> asd#asdf
> zxcasdf
> 2#asdf
> grunt> l = load 't.txt' as (a : chararray);
> grunt> f = filter l by (a matches '.*#.*');
> grunt> dump f; 
> -- No output, though two rows are expected.
> --As a workaround, add a \ to escape the # . This regex is valid even in 0.7 , and it
will be even after this bug is fixed (its valid java regex, which has same meaning as above
regex).
> grunt> f = filter l by (a matches '.*\\#.*');
> grunt> dump f; 
> asd#asdf
> 2#asdf
> {code}

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