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From "Ashish Thusoo (JIRA)" <j...@apache.org>
Subject [jira] Created: (HIVE-463) Add a pre execution hook to ql
Date Thu, 30 Apr 2009 19:07:30 GMT
Add a pre execution hook to ql

                 Key: HIVE-463
                 URL: https://issues.apache.org/jira/browse/HIVE-463
             Project: Hadoop Hive
          Issue Type: New Feature
          Components: Query Processor
    Affects Versions: 0.4.0
            Reporter: Ashish Thusoo
            Assignee: Ashish Thusoo
            Priority: Minor

There may be cases where user defined logic needs to be executed between the compilation and
execution phases of a query. One simple example that we ran into is based on archival. If
an external utility archives table partitions of example, then a plugin logic can check that
for the partitions and take suitable action such as:

- Unarchiving the partition seemlessly
- Throwing an error


This same framework can also be used for updating query compilation stats.

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