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Posted to issues@hive.apache.org by "Sankar Hariappan (JIRA)" <ji...@apache.org> on 2018/05/03 13:53:00 UTC

[jira] [Comment Edited] (HIVE-18193) Migrate existing ACID tables to use write id per table rather than global transaction id

    [ https://issues.apache.org/jira/browse/HIVE-18193?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16462469#comment-16462469 ] 

Sankar Hariappan edited comment on HIVE-18193 at 5/3/18 1:52 PM:
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Attached 01.patch with upgrade scripts for all databases.

Manually tested for Mysql and also ran below tests for other databases.

mvn verify -Ditest.jdbc.jars='/Users/shariappan/Documents/Work/Configs/ojdbc6.jar' -DskipITests=false -Dtest=nosuch

 

[~ekoifman], [~maheshk114], [~thejas],

Can you please review the patch?

 


was (Author: sankarh):
Attached 01.patch with upgrade scripts for all databases.

> 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: Blocker
>              Labels: ACID, Upgrade
>         Attachments: HIVE-18193.01.patch
>
>
> 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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