[teiid-issues] [JBoss JIRA] (TEIID-2185) Cost estimation for temp table index selection is incorrect

Mon Sep 10 13:32:32 EDT 2012

     [ https://issues.jboss.org/browse/TEIID-2185?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins resolved TEIID-2185.
-----------------------------------

    Resolution: Done

Corrected the logic and added a performance test to show index improvement.  There's a big todo to develop a planned form of a temp query to make it easier for unit testing to show index usage.

> Cost estimation for temp table index selection is incorrect
> -----------------------------------------------------------
>
>                 Key: TEIID-2185
>                 URL: https://issues.jboss.org/browse/TEIID-2185
>             Project: Teiid
>          Issue Type: Bug
>          Components: Query Engine
>    Affects Versions: 7.4
>            Reporter: Steven Hawkins
>            Assignee: Steven Hawkins
>             Fix For: 8.2
>
>
> The index selection for temporary tables incorrectly computes an additional cost factor that biases the selection against secondary indexies.

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