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Posted to dev@datafu.apache.org by "Matthew Hayes (JIRA)" <ji...@apache.org> on 2014/11/03 23:16:34 UTC
[jira] [Resolved] (DATAFU-69) Create SelectFieldByName UDF - which,
given a field who's value contains a field name, and *, returns the value
of the field referenced by the field name
[ https://issues.apache.org/jira/browse/DATAFU-69?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Matthew Hayes resolved DATAFU-69.
---------------------------------
Resolution: Fixed
> Create SelectFieldByName UDF - which, given a field who's value contains a field name, and *, returns the value of the field referenced by the field name
> ---------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: DATAFU-69
> URL: https://issues.apache.org/jira/browse/DATAFU-69
> Project: DataFu
> Issue Type: Bug
> Affects Versions: 1.3.0
> Reporter: Russell Jurney
> Assignee: Russell Jurney
> Labels: features
> Fix For: 1.3.0
>
> Attachments: DATAFU-69.patch, DATAFU-69.patch, DATAFU-69.patch, DATAFU-69.patch
>
>
> define SelectFieldByName datafu.pig.util.SelectFieldByName();
> data = LOAD 'input' using PigStorage(',') AS (fieldName:chararray, text1:chararray, text2:chararray, text3:chararray);
> data2 = FOREACH data GENERATE fieldName, SelectFieldByName(fieldName,*) as result;
> data3 = FOREACH data2 GENERATE fieldName, result;
> STORE data3 INTO 'output';
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