[teiid-issues] [JBoss JIRA] (TEIID-5533) Improve odbc index metadata query performance

[Steven Hawkins (Jira)]

     [ https://issues.jboss.org/browse/TEIID-5533?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins resolved TEIID-5533.
-----------------------------------
    Fix Version/s: 11.1.2
                   11.2.1
       Resolution: Done


Initially looked to address this with a localized common table in the pg_index definition - thus the related issues that were logged/addressed TEIID-5531 and TEIID-5532.  TEIID-5529 was a good issue to address in general that was preventing the pushdown of the oid expression to the subquery evaluation.

Ultimately it's more straight-forward to address by materializing pg_attribute and add an appropriate index.

With these changes there doesn't seem to be a need for the index materialization to be a managed load, but that could be added as well.

> Improve odbc index metadata query performance
> ---------------------------------------------
>
>                 Key: TEIID-5533
>                 URL: https://issues.jboss.org/browse/TEIID-5533
>             Project: Teiid
>          Issue Type: Quality Risk
>          Components: ODBC
>            Reporter: Steven Hawkins
>            Assignee: Steven Hawkins
>            Priority: Major
>             Fix For: 11.1.2, 12.0, 11.2.1
>
>
> For a large number of tables/columns the query for pg_index takes an inordinate amount of time to complete - for releases after 10.1.1 this will happen only for the initial load.
> The structure of the query should be improved as well as a managed materialization load to better ensure that it does not block a user query.



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