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From "Namit Jain (JIRA)" <j...@apache.org>
Subject [jira] Created: (HIVE-1781) outputs not populated for dynamic partitions at compile time
Date Wed, 10 Nov 2010 18:05:13 GMT
outputs not populated for dynamic partitions at compile time
------------------------------------------------------------

                 Key: HIVE-1781
                 URL: https://issues.apache.org/jira/browse/HIVE-1781
             Project: Hive
          Issue Type: Bug
            Reporter: Namit Jain


OSTHOOK: query: create table tstsrcpart like srcpart
POSTHOOK: type: CREATETABLE
POSTHOOK: Output: default@tstsrcpart
PREHOOK: query: from srcpart
insert overwrite table tstsrcpart partition (ds, hr) select key, value, ds, hr where ds <=
'2008-04-08'
PREHOOK: type: QUERY
PREHOOK: Input: default@srcpart@ds=2008-04-08/hr=11
PREHOOK: Input: default@srcpart@ds=2008-04-08/hr=12
POSTHOOK: query: from srcpart



As is evident from above, the outputs are not populated at all at compile time.

This may create a problem for many components that depend on outputs: locking, authorization
etc.
However, the exact set of outputs may be needed for some other components (for example. the
internal deployment in Facebook has a replication hook which is used for replication which
needs the
exact set of outputs). It may  be a good idea to extend WriteEntity to include a flag which
indicates
whether the output is complete or not, and then the hook can look at that flag if needed


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