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From "Eugene Koifman (JIRA)" <>
Subject [jira] [Updated] (HIVE-15844) Make ReduceSinkOperator independent of Acid
Date Wed, 01 Mar 2017 19:15:45 GMT


Eugene Koifman updated HIVE-15844:
    Summary: Make ReduceSinkOperator independent of Acid  (was: Add WriteType to Explain Plan
of ReduceSinkOperator and FileSinkOperator)

> Make ReduceSinkOperator independent of Acid
> -------------------------------------------
>                 Key: HIVE-15844
>                 URL:
>             Project: Hive
>          Issue Type: Bug
>          Components: Transactions
>            Reporter: Eugene Koifman
>            Assignee: Eugene Koifman
>             Fix For: 1.0.0
>         Attachments: HIVE-15844.01.patch, HIVE-15844.02.patch, HIVE-15844.03.patch, HIVE-15844.04.patch,
HIVE-15844.05.patch, HIVE-15844.06.patch, HIVE-15844.07.patch, HIVE-15844.08.patch
> # both FileSinkDesk and ReduceSinkDesk have special code path for Update/Delete operations.
It is not always set correctly for ReduceSink. ReduceSinkDeDuplication is one place where
it gets lost. Even when it isn't set correctly, elsewhere we set ROW_ID to be the partition
column of the ReduceSinkOperator and UDFToInteger special cases it to extract bucketId from
ROW_ID. We need to modify Explain Plan to record Write Type (i.e. insert/update/delete) to
make sure we have tests that can catch errors here.
> # Add some validation at the end of the plan to make sure that RSO/FSO which represent
the end of the pipeline and write to acid table have WriteType set (to something other than
> #  We don't seem to have any tests where number of buckets is > number of reducers.
Add those.

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