[teiid-issues] [JBoss JIRA] (TEIID-4641) Create upsert/delete refresh support

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 Labels: Beta1 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.