[teiid-issues] [JBoss JIRA] (TEIID-196) Support creation of temp tables on physical sources.

Support creation of temp tables on physical sources. ---------------------------------------------------- Key: TEIID-196 URL: https://issues.jboss.org/browse/TEIID-196 Project: Teiid Issue Type: Feature Request Components: Connector API, Query Engine Affects Versions: 6.0.0 Reporter: Ken Johnson Fix For: 8.3 This is a multi-part request. First, the system should support creation of temporary tables using a physical backing store rather than buffer manger. Given multi-pass SQL's heavy use of temp tables, buffer manager can easily be overloaded with large interim results stored in temp tables. Second, this should be a user-configurable behavior. For example, user might be able to choose a system-level or session-level default from among: -- memory/cache -- a source represented by a connector binding -- a distinct temp source defined with it's own connection parameters (possibly another schema in the repository DB instance) Ideally default selectoin should be override-able at temp table creation time through a DDL extension In the case where multiple temp tables have been created on a source via connector, the query planner should recognize this and leverage pushdown to the temp store when later query passes access multiple temp tables.