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Posted to dev@hive.apache.org by "Sergey Shelukhin (JIRA)" <ji...@apache.org> on 2015/02/12 03:22:13 UTC

[jira] [Created] (HIVE-9660) store end offset of compressed data for RG in RowIndex in ORC

Sergey Shelukhin created HIVE-9660:
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             Summary: store end offset of compressed data for RG in RowIndex in ORC
                 Key: HIVE-9660
                 URL: https://issues.apache.org/jira/browse/HIVE-9660
             Project: Hive
          Issue Type: Bug
            Reporter: Sergey Shelukhin


Right now the end offset is estimated, which in some cases results in tons of extra data being read.
We can add a separate array to RowIndex (positions_v2?) that stores number of compressed buffers for each RG, or end offset, or something, to remove this estimation magic



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