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https://issues.apache.org/jira/browse/HIVE-10697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14549317#comment-14549317
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Hari Sankar Sivarama Subramaniyan commented on HIVE-10697:
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[~swarnim] Thanks for getting back on this, can you please provide the test
case you are trying. It looks like the current code is faulty as you pointed
out initially and will require modification.
Thanks
Hari
> ObjecInspectorConvertors#UnionConvertor does a faulty conversion
> ----------------------------------------------------------------
>
> Key: HIVE-10697
> URL: https://issues.apache.org/jira/browse/HIVE-10697
> Project: Hive
> Issue Type: Bug
> Components: Serializers/Deserializers
> Reporter: Swarnim Kulkarni
> Assignee: Swarnim Kulkarni
>
> Currently the UnionConvertor in the ObjectInspectorConvertors class has an
> issue with the convert method where it attempts to convert the
> objectinspector itself instead of converting the field.[1]. This should be
> changed to convert the field itself. This could result in a
> ClassCastException as shown below:
> {code}
> Caused by: java.lang.ClassCastException:
> org.apache.hadoop.hive.serde2.lazy.objectinspector.LazyUnionObjectInspector
> cannot be cast to org.apache.hadoop.hive.serde2.lazy.LazyString
> at
> org.apache.hadoop.hive.serde2.lazy.objectinspector.primitive.LazyStringObjectInspector.getPrimitiveWritableObject(LazyStringObjectInspector.java:51)
> at
> org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorConverter$TextConverter.convert(PrimitiveObjectInspectorConverter.java:391)
> at
> org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorConverter$TextConverter.convert(PrimitiveObjectInspectorConverter.java:338)
> at
> org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorConverters$UnionConverter.convert(ObjectInspectorConverters.java:456)
> at
> org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorConverters$StructConverter.convert(ObjectInspectorConverters.java:395)
> at
> org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorConverters$MapConverter.convert(ObjectInspectorConverters.java:539)
> at
> org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorConverters$StructConverter.convert(ObjectInspectorConverters.java:395)
> at
> org.apache.hadoop.hive.ql.exec.MapOperator$MapOpCtx.readRow(MapOperator.java:154)
> at
> org.apache.hadoop.hive.ql.exec.MapOperator$MapOpCtx.access$200(MapOperator.java:127)
> at
> org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:518)
> ... 9 more
> {code}
> [1]
> https://github.com/apache/hive/blob/master/serde/src/java/org/apache/hadoop/hive/serde2/objectinspector/ObjectInspectorConverters.java#L466
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