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https://issues.apache.org/jira/browse/PIG-3293?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Koji Noguchi updated PIG-3293:
------------------------------
Attachment: pig-3293-test-only-v01.patch
bq. Must be the "caster" in D's POCast is null. Can you attach MyLoader?
Attaching a test case using
{noformat}
public class PigStorageWithStatistics extends PigStorage {
{noformat}
from org.apache.pig.test. Even though both PigStorage and
PigStorageWithStatistics returns Utf8StorageConverter, testcase fails with
"Cannot determine how to convert the
bytearray to string."
Note that I created PIG-3295 for dealing with the case when casting fails even
when union comes from the same loader.
Figuring out if the loaders were same was easy with calling 'equals' for the
FuncSpec instances. I don't know how to achieve this easily for comparing
casters.
> Casting fails after Union from two data sources&loaders
> -------------------------------------------------------
>
> Key: PIG-3293
> URL: https://issues.apache.org/jira/browse/PIG-3293
> Project: Pig
> Issue Type: Bug
> Reporter: Koji Noguchi
> Priority: Minor
> Attachments: pig-3293-test-only-v01.patch
>
>
> Script similar to
> {noformat}
> A = load 'data1' using MyLoader() as (a:bytearray);
> B = load 'data2' as (a:bytearray);
> C = union onschema A,B;
> D = foreach C generate (chararray)a;
> Store D into './out';
> {noformat}
> fails with
> java.lang.Exception: org.apache.pig.backend.executionengine.ExecException:
> ERROR 1075: Received a bytearray from the UDF. Cannot determine how to
> convert the bytearray to string.
> Both MyLoader and PigStorage use the default Utf8StorageConverter.
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