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From "Kevin Wilfong (JIRA)" <>
Subject [jira] [Commented] (HIVE-3940) Track columns accessed in each table in a query
Date Mon, 28 Jan 2013 21:55:14 GMT


Kevin Wilfong commented on HIVE-3940:

Can you update the patch on the JIRA to match what's in Phabricator?
> Track columns accessed in each table in a query
> -----------------------------------------------
>                 Key: HIVE-3940
>                 URL:
>             Project: Hive
>          Issue Type: Task
>          Components: Query Processor
>            Reporter: Samuel Yuan
>            Assignee: Samuel Yuan
>            Priority: Minor
>         Attachments: HIVE-3940.1.patch.txt
> Similar to partition access logs, we need to have columns access logs, so later we can
build tools/reports to inform users if there are wasted columns in a table to be trimmed.

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