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https://issues.apache.org/jira/browse/HIVE-18193?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eugene Koifman updated HIVE-18193:
----------------------------------
    Fix Version/s:     (was: 3.1.0)

> Migrate existing ACID tables to use write id per table rather than global 
> transaction id
> ----------------------------------------------------------------------------------------
>
>                 Key: HIVE-18193
>                 URL: https://issues.apache.org/jira/browse/HIVE-18193
>             Project: Hive
>          Issue Type: Sub-task
>          Components: HiveServer2, Transactions
>    Affects Versions: 3.0.0
>            Reporter: anishek
>            Assignee: Sankar Hariappan
>            Priority: Major
>
> dependent upon HIVE-18192
> For existing ACID Tables we need to update the table level write id 
> metatables/sequences so any new operations on these tables works seamlessly 
> without any conflicting data in existing base/delta files.
> 1. Need to create metadata tables such as NEXT_WRITE_ID and TXN_TO_WRITE_ID.
> 2. Add entries for each ACID/MM tables into NEXT_WRITE_ID where NWI_NEXT is 
> set to current value of NEXT_TXN_ID.NTXN_NEXT.
> 3. All current open/abort transactions to have an entry in TXN_TO_WRITE_ID 
> such that T2W_TXNID=T2W_WRITEID=Open/AbortedTxnId.
> 4. Added new column TC_WRITEID in TXN_COMPONENTS and CTC_WRITEID in 
> COMPLETED_TXN_COMPONENTS to store the write id which should be set as 
> respective values of TC_TXNID and CTC_TXNID from the same row.



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