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Automatic index advisor?

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Hi,

I'm writing a book on SQL, with a short section about query tuning and automatic optimization advisors for different RDBMS platforms, for instance, extensions to EXPLAIN that recommend new indexes based on workload and query plans.

When I searched for a solution for PostgreSQL, Gurjeet Singh's name came up as the designer of an index adviser patch for PG. But the latest information I found was in 2007.

There's also a project at pgFoundry, but it's listed as in a planning stage, and there are no releases.

Can I ask what's the status of this capability for PostgreSQL? Has it become part of PostgreSQL 8.x or 9.0? I couldn't find any information in the docs. Is there any value-add tool for EnterpriseDB?

If Gurjeet's patch is still under development, are there any other tools currently available for PostgreSQL that provide this kind of capability?

Regards,
Bill Karwin

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