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From "Kevin Wilfong (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-3750) JDBCStatsPublisher fails when ID length exceeds length of ID column
Date Wed, 28 Nov 2012 00:16:58 GMT
Kevin Wilfong created HIVE-3750:
-----------------------------------

             Summary: JDBCStatsPublisher fails when ID length exceeds length of ID column
                 Key: HIVE-3750
                 URL: https://issues.apache.org/jira/browse/HIVE-3750
             Project: Hive
          Issue Type: Bug
          Components: Statistics
    Affects Versions: 0.11
            Reporter: Kevin Wilfong
            Assignee: Kevin Wilfong


When the length of the ID field passed to JDBCStatsPublisher exceeds the length of the column
in the table (currently 255 characters) stats collection fails.  This causes the entire query
to fail when hive.stats.reliable is set to true.

One way to prevent this would be to calculate a deterministic, very low collision hash of
the ID prefix used for aggregation and use that when the length of the ID is too long.

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