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https://issues.apache.org/jira/browse/PIG-1770?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thejas M Nair updated PIG-1770:
-------------------------------
Attachment: PIG-1770.1.patch
PIG-1770.1.patch - With this patch the regex optional patterns in the automaton
library are disabled so that pattern matching works as expected.
Unit tests pass. Output of test-patch -
[exec] +1 overall.
[exec]
[exec] +1 @author. The patch does not contain any @author tags.
[exec]
[exec] +1 tests included. The patch appears to include 3 new or
modified tests.
[exec]
[exec] +1 javadoc. The javadoc tool did not generate any warning
messages.
[exec]
[exec] +1 javac. The applied patch does not increase the total number
of javac compiler warnings.
[exec]
[exec] +1 findbugs. The patch does not introduce any new Findbugs
warnings.
[exec]
[exec] +1 release audit. The applied patch does not increase the
total number of release audit warnings.
> 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: 0.8.0, 0.9.0
>
> 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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