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Posted to dev@hive.apache.org by "Mohit Sabharwal (JIRA)" <ji...@apache.org> on 2016/02/13 02:29:18 UTC

[jira] [Created] (HIVE-13057) Remove duplicate copies of TableDesc property values in PartitionDesc

Mohit Sabharwal created HIVE-13057:
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             Summary: Remove duplicate copies of TableDesc property values in PartitionDesc
                 Key: HIVE-13057
                 URL: https://issues.apache.org/jira/browse/HIVE-13057
             Project: Hive
          Issue Type: Bug
            Reporter: Mohit Sabharwal
            Assignee: Mohit Sabharwal


For a partitioned table, each PartitionDesc has a copy of corresponding TableDesc.

While TableDesc is mutable and hence cannot be interned, it's property values can be.

For a simple select on a table with 100K partitions, this cut total number of String instances by ~65%.

Most replicated strings were location, serde, input/output format, column, types, table name, etc.



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