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https://issues.apache.org/jira/browse/HIVE-1131?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ashish Thusoo updated HIVE-1131:
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Attachment: HIVE-1131_5.patch
Added a more centralized function to decide what is the dependency type. Also
reduced the number of dependency types to SIMPLE, EXPRESSION and SELECT. SIMPLE
= a copy of the column, EXPRESSION = UDF, UDAF, UDTF or union all, SCRIPT = if
a user script is used.
Also fixed the HashMap to LinkedHashMap..
> Add column lineage information to the pre execution hooks
> ---------------------------------------------------------
>
> Key: HIVE-1131
> URL: https://issues.apache.org/jira/browse/HIVE-1131
> Project: Hadoop Hive
> Issue Type: New Feature
> Components: Query Processor
> Reporter: Ashish Thusoo
> Assignee: Ashish Thusoo
> Attachments: HIVE-1131.patch, HIVE-1131_2.patch, HIVE-1131_3.patch,
> HIVE-1131_4.patch, HIVE-1131_5.patch
>
>
> We need a mechanism to pass the lineage information of the various columns of
> a table to a pre execution hook so that applications can use that for:
> - auditing
> - dependency checking
> and many other applications.
> The proposal is to expose this through a bunch of classes to the pre
> execution hook interface to the clients and put in the necessary
> transformation logic in the optimizer to generate this information.
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