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https://issues.apache.org/jira/browse/PIG-2377?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
robin zhang tao updated PIG-2377:
---------------------------------
Attachment: EvalFunc_equals.patch
patch for EvalFunc check return type equals
> EvalFunc should use equals() to check equal for ReturnType of
> Initial/Intermed/Final
> ------------------------------------------------------------------------------------
>
> Key: PIG-2377
> URL: https://issues.apache.org/jira/browse/PIG-2377
> Project: Pig
> Issue Type: Bug
> Components: impl
> Affects Versions: 0.9.1
> Reporter: robin zhang tao
> Attachments: EvalFunc_equals.patch
>
>
> When EvalFunc check the return type equals with ReturnType of
> Initial/Intermed/Final, it uses the "==" operator.
> But it should not use "==", but "equals()".
> I have built one UDF, its return type is "Map<String, Long>", and also the
> Final class returns "Map<String, Long>".
> public class MapLongSum extends EvalFunc<Map<String, Long>> implements
> Algebraic,
> Accumulator<Map<String, Long>> {
> ...
> ...
> static public class Final extends EvalFunc<Map<String, Long>> {
> ...
> }
> }
> But Pig always reports error:
> Caused by: java.lang.RuntimeException: Final function of
> com.duowan.yy.etl.log.eval.MapIntSum is not of the expected type.
> at org.apache.pig.EvalFunc.<init>(EvalFunc.java:146)
> at com.duowan.yy.etl.log.eval.MapIntSum.<init>(MapIntSum.java:40)
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
> Method)
> at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
> at java.lang.Class.newInstance0(Class.java:355)
> at java.lang.Class.newInstance(Class.java:308)
> at
> org.apache.pig.impl.PigContext.instantiateFuncFromSpec(PigContext.java:474)
> ... 31 more
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