[teiid-issues] [JBoss JIRA] (TEIID-4641) Create upsert/delete refresh support
Ramesh Reddy (JIRA)
issues at jboss.org
Tue Dec 20 10:02:00 EST 2016
[ https://issues.jboss.org/browse/TEIID-4641?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Work on TEIID-4641 started by Ramesh Reddy.
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> Create upsert/delete refresh support
> ------------------------------------
>
> Key: TEIID-4641
> URL: https://issues.jboss.org/browse/TEIID-4641
> Project: Teiid
> Issue Type: Sub-task
> Components: Query Engine
> Reporter: Steven Hawkins
> Assignee: Ramesh Reddy
> Fix For: 9.2
>
>
> There must be an alternative to the implied default of the table rename strategy - which is problematic when a source is not transactional or even when it is - as a multi-part swap can leave the table non-existent for a brief window or the source may have issues with ddl under an xa transaction - TEIID-4579
> This is true for the non-transactional source incremental refresh as well, which is a delete then insert - it leaves the live table briefly in an inconsistent state.
> A upsert/delete approach addresses both of these concerns at the expense of performance - especially when the source does not directly support upsert as the engine must implement a compensating procedure. However now that we have pushdown support for upsert, we'll continue to add source support.
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