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https://issues.apache.org/jira/browse/PIG-2557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16389635#comment-16389635
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Mário Sérgio Fujikawa Ferreira commented on PIG-2557:
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I can confirm the issue with Apache Pig 0.16.0 from Hortonworks HDP 2.5.3.
$ cat /tmp/csvexcelstorage_test.csv
"A",B,"",,C
# pig -x local
grunt> REGISTER /usr/hdp/current/pig-client/lib/piggybank.jar;
grunt> A = LOAD '/tmp/csvexcelstorage_test.csv' USING
org.apache.pig.piggybank.storage.CSVExcelStorage() AS ( first: chararray,
second: chararray, third: chararray, fourth: chararray, fifth: chararray);
grunt> dump A
(A,B,",,C)
The third column should be dumped as null instead of " (double quote). It could
only be a double quote if csvexcelstorage_test.csv had
"A",B,"""",,C
> CSVExcelStorage save : empty quotes "" becomes 4 quotes """". This should
> become a null field.
> -----------------------------------------------------------------------------------------------
>
> Key: PIG-2557
> URL: https://issues.apache.org/jira/browse/PIG-2557
> Project: Pig
> Issue Type: Bug
> Components: piggybank
> Affects Versions: 0.9.1
> Reporter: Peter Welch
> Priority: Minor
>
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