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Posted to dev@hive.apache.org by "Eric Hanson (JIRA)" <ji...@apache.org> on 2014/02/17 22:44:24 UTC

[jira] [Created] (HIVE-6452) fix bug in UnsignedInt128.multiplyArrays4And4To8 and revert temporary fix in Decimal128.multiplyDestructive

Eric Hanson created HIVE-6452:
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             Summary: fix bug in UnsignedInt128.multiplyArrays4And4To8 and revert temporary fix in Decimal128.multiplyDestructive
                 Key: HIVE-6452
                 URL: https://issues.apache.org/jira/browse/HIVE-6452
             Project: Hive
          Issue Type: Sub-task
    Affects Versions: 0.13.0
            Reporter: Eric Hanson


UnsignedInt128.multiplyArrays4And4To8 has a bug that causes rare multiply failures, one of which appears in TestDecimal128.testKnownPriorErrors.

Fix the bug by finishing the TODO section in UnsignedInt128.multiplyArrays4And4To8 in the provided multiplyArrays4And4To8-start.patch. Make it fast and make it work with no per-operation storage allocations.

Retain the rest of the work (the new tests) in multiplyArrays4And4To8-start.patch as much as possible.

Revert the changes to Decimal128.multiplyDestructive so it doesn't use the short-term, slow fix based on HiveDecimal. I.e. use the implementation in multiplyDestructiveNativeDecimal128.




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