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https://issues.apache.org/jira/browse/HIVE-19750?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eugene Koifman updated HIVE-19750:
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Attachment: HIVE-19750.03.patch
> Initialize NEXT_WRITE_ID. NWI_NEXT on converting an existing table to full
> acid
> -------------------------------------------------------------------------------
>
> Key: HIVE-19750
> URL: https://issues.apache.org/jira/browse/HIVE-19750
> Project: Hive
> Issue Type: Bug
> Components: Transactions
> Affects Versions: 3.0.0
> Reporter: Eugene Koifman
> Assignee: Eugene Koifman
> Priority: Critical
> Fix For: 3.1.0
>
> Attachments: HIVE-19750.01.patch, HIVE-19750.02.patch,
> HIVE-19750.03.patch
>
>
> Need to set this to a reasonably high value the the table.
> This will reserve a range of write IDs that will be treated by the system as
> committed.
> This is needed so that we can assign unique ROW__IDs to each row in files
> that already exist in the table. For example, if the value is initialized to
> the number of files currently in the table, we can think of each file as
> written by a separate transaction and thus a free to assign bucketProperty
> (BucketCodec) of ROW_ID in whichever way is convenient.
> it's guaranteed that all rows get unique ROW_IDs this way.
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