[teiid-issues] [JBoss JIRA] Resolved: (TEIID-1335) Customer requesting the ability to make query planner always create dependent joins.

[Steven Hawkins (JIRA)]

     [ https://issues.jboss.org/browse/TEIID-1335?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins resolved TEIID-1335.
-----------------------------------

    Resolution: Rejected


Marking as rejected since we will not work the issue as stated (forcing dependent joins without a hint).  If more information could be provided, then we could work this as a costing/planning issue.

> Customer requesting the ability to make query planner always create dependent joins.
> ------------------------------------------------------------------------------------
>
>                 Key: TEIID-1335
>                 URL: https://issues.jboss.org/browse/TEIID-1335
>             Project: Teiid
>          Issue Type: Feature Request
>          Components: Server
>            Reporter: Debbie Steigner
>            Assignee: Steven Hawkins
>
> Customer is finding that the query planner often chooses to use a non-dependent join plan, even when cost statistics have been gathered on all source systems and a dependent plan would perform much better.
> I've showed them how to use option makedep to force a dependent join scenario. However, it requires careful analysis of each query to setup the proper makedep parameters, and may not be feasible when working with hibernate as the client.
> Thus, they ask: is there any way to tell the query planner to always use dependent join for every join, no matter what.

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