[teiid-issues] [JBoss JIRA] Updated: (TEIID-196) Support creation of temp tables on physical sources.
Steven Hawkins (JIRA)
jira-events at lists.jboss.org
Wed Feb 11 12:32:02 EST 2009
[ https://jira.jboss.org/jira/browse/TEIID-196?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Steven Hawkins updated TEIID-196:
---------------------------------
Component/s: Connector API
Query Engine
Fix Version/s: 6.1.0
Affects Version/s: 6.0.0
Affects: [Documentation (Ref Guide, User Guide, etc.), Compatibility/Configuration, Release Notes]
Complexity: High
> Support creation of temp tables on physical sources.
> ----------------------------------------------------
>
> Key: TEIID-196
> URL: https://jira.jboss.org/jira/browse/TEIID-196
> Project: Teiid
> Issue Type: Feature Request
> Components: Connector API, Query Engine
> Affects Versions: 6.0.0
> Reporter: Ken Johnson
> Fix For: 6.1.0
>
>
> 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.
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