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https://issues.apache.org/jira/browse/HIVE-9138?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14317444#comment-14317444
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Navis commented on HIVE-9138:
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Explainable was introduced to avoid implementing Serializable just for explain
result. I can remove this but PTFInputDef, etc. should be Serializable.
Changes in ColumnPruner are basically for setting output shape of partition
function for explain. It's transient fields just for building PTF at first time
and seemed safe to change.
> Add some explain to PTF operator
> --------------------------------
>
> Key: HIVE-9138
> URL: https://issues.apache.org/jira/browse/HIVE-9138
> Project: Hive
> Issue Type: Improvement
> Components: Query Processor
> Reporter: Navis
> Assignee: Navis
> Priority: Trivial
> Attachments: HIVE-9138.1.patch.txt, HIVE-9138.2.patch.txt,
> HIVE-9138.3.patch.txt
>
>
> PTFOperator does not explain anything in explain statement, making it hard to
> understand the internal works.
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