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From "Russell Jurney (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DATAFU-69) Create ChooseFieldByValue UDF - which, given a field who's value contains a field name, and *, returns the value of the field referenced by the field name
Date Fri, 12 Sep 2014 00:10:33 GMT

     [ https://issues.apache.org/jira/browse/DATAFU-69?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Russell Jurney updated DATAFU-69:
---------------------------------
    Attachment: DATAFU-69.patch

Implementation and unit test.

> Create ChooseFieldByValue 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
>              Labels: features
>         Attachments: DATAFU-69.patch
>
>
> define ChooseFieldByValue datafu.pig.util.ChooseFieldByValue();
> data = LOAD 'input' using PigStorage(',') AS (fieldName:chararray, text1:chararray, text2:chararray,
text3:chararray);
> data2 = FOREACH data GENERATE fieldName, ChooseFieldByValue(fieldName,*) as result;
> data3 = FOREACH data2 GENERATE fieldName, result;
> STORE data3 INTO 'output';



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