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From "Russell Jurney (JIRA)" <j...@apache.org>
Subject [jira] [Created] (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 Thu, 11 Sep 2014 20:20:34 GMT
Russell Jurney created DATAFU-69:
------------------------------------

             Summary: 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


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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