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Date: Fri, 16 Mar 2012 00:40:39 +0000 (UTC)
From: "Phabricator (Updated) (JIRA)" <jira@apache.org>
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Subject: [jira] [Updated] (HIVE-2871) Add a new hook to run at the beginning
 and end of the Driver.run method
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     [ https://issues.apache.org/jira/browse/HIVE-2871?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Phabricator updated HIVE-2871:
------------------------------

    Attachment: HIVE-2871.D2331.3.patch

kevinwilfong updated the revision "HIVE-2871 [jira] Add a new hook to run at the beginning and end of the Driver.run method".
Reviewers: JIRA, njain

  So sorry about that, my eclipse tends to remove imports if I haven't setup the build path properly.  Ran ant clean package, so it should be good.

REVISION DETAIL
  https://reviews.facebook.net/D2331

AFFECTED FILES
  conf/hive-default.xml.template
  common/src/java/org/apache/hadoop/hive/conf/HiveConf.java
  ql/src/test/results/clientpositive/hook_order.q.out
  ql/src/test/org/apache/hadoop/hive/ql/hooks/VerifyHooksRunInOrder.java
  ql/src/test/queries/clientpositive/hook_order.q
  ql/src/java/org/apache/hadoop/hive/ql/HiveDriverRunHook.java
  ql/src/java/org/apache/hadoop/hive/ql/HiveDriverRunHookContextImpl.java
  ql/src/java/org/apache/hadoop/hive/ql/HiveDriverRunHookContext.java
  ql/src/java/org/apache/hadoop/hive/ql/Driver.java

                
> Add a new hook to run at the beginning and end of the Driver.run method
> -----------------------------------------------------------------------
>
>                 Key: HIVE-2871
>                 URL: https://issues.apache.org/jira/browse/HIVE-2871
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Kevin Wilfong
>            Assignee: Kevin Wilfong
>         Attachments: HIVE-2871.D2331.1.patch, HIVE-2871.D2331.2.patch, HIVE-2871.D2331.3.patch
>
>
> Driver.run is the highest level method which all queries go through, whether they come from Hive Server, the CLI, or any other entry.  We also do not have any hooks before the compilation method is called, and having hooks in Driver.run would provide this.  Having hooks in Driver.run will allow, for example, being able to overwrite config values used throughout query processing, including compilation, and at the other end, cleaning up any resources/logging any final values just before returning to the user.

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