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https://issues.apache.org/jira/browse/PIG-2004?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniel Dai updated PIG-2004:
----------------------------
Attachment: PIG-2004-0.patch
TypeCheckVisitor does not update schema before processing LOGenerate. Attach a
patch for demonstration. Assign to Thejas for further investigation.
> Incorrect input types passed on to eval function
> ------------------------------------------------
>
> Key: PIG-2004
> URL: https://issues.apache.org/jira/browse/PIG-2004
> Project: Pig
> Issue Type: Bug
> Components: impl
> Affects Versions: 0.9.0
> Reporter: Vivek Padmanabhan
> Assignee: Xuefu Zhang
> Fix For: 0.9.0
>
> Attachments: PIG-2004-0.patch
>
>
> The below script fails by throwing a ClassCastException from the MAX udf. The
> udf expects the value of the bag supplied to be databyte array, but at run
> time the udf gets the actual type, ie Double in this case. This causes the
> script execution to fail with exception;
> | Caused by: java.lang.ClassCastException: java.lang.Double cannot be cast to
> org.apache.pig.data.DataByteArray
> The same script runs properly with Pig 0.8.
> {code}
> A = LOAD 'myinput' as (f1,f2,f3);
> B = foreach A generate f1,f2+f3/1000.0 as doub;
> C = group B by f1;
> D = foreach C generate (long)(MAX(B.doub)) as f4;
> dump D;
> {code}
> myinput
> -------
> a 1000 12345
> b 2000 23456
> c 3000 34567
> a 1500 54321
> b 2500 65432
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