[
https://issues.apache.org/jira/browse/IMPALA-8788?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Tim Armstrong updated IMPALA-8788:
----------------------------------
Component/s: Frontend
> Read globally consistent snapshot of ACID tables
> ------------------------------------------------
>
> Key: IMPALA-8788
> URL: https://issues.apache.org/jira/browse/IMPALA-8788
> Project: IMPALA
> Issue Type: Improvement
> Components: Frontend
> Reporter: Zoltán Borók-Nagy
> Priority: Major
> Labels: impala-acid
>
> For ACID tables Impala fetches the valid write ids outside of a transaction.
> This means that when a query refers to multiple ACID tables (e.g. doing a
> join) the query might observe the modifications of the tables out of order.
> E.g. let's suppose that the modification order is "write to A", then "write
> to B", but Impala might see "write to B" without seeing "write to A".
> Instead of that Impala should open a transaction and fetch the valid write
> ids in the context of the opened transaction. This way Impala would see a
> consistent global snapshot of all the tables.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
