[Info-ingres] Performance of Primary Key v Index

[Laframboise, André (BAC/LAC)]

Short answer is yes, or better. If you're using the primary key, you're avoiding the join the index table does to get the table data you're extracting.
(unless you added the data in the index table).

André Laframboise

Conseiller Principal Base de Données, Direction générale de l'Innovation et du Dirigeant principal de l'information
Bibliothèque et Archives Canada<http://www.bac-lac.gc.ca/fra/Pages/bac-web.aspx> / Gouvernement du Canada
andre.laframboise at canada.ca<mailto:andre.laframboise at canada.ca> / Tél. : 613-298-1346

Senior Database Advisor, Innovation and Chief Information Officer Branch
Library and Archives Canada<http://www.bac-lac.gc.ca/eng/Pages/lac-web.aspx> / Government of Canada
andre.laframboise at canada.ca<mailto:andre.laframboise at canada.ca> / Tel: 613-298-1346

[http://www.bac-lac.gc.ca/eng/events/PublishingImages/banner.jpg]<http://www.bac-lac.gc.ca/eng/events/Pages/events.aspx>

From: info-ingres-bounces at lists.planetingres.org <info-ingres-bounces at lists.planetingres.org> On Behalf Of Darren Harvey
Sent: Sunday, July 28, 2019 7:29 PM
To: info-ingres at lists.planetingres.org
Subject: [Info-ingres] Performance of Primary Key v Index

Hi All

If I have a table that has a Primary Key with 2 columns in the key, does the Primary Key provide the same performance for selecting data on those 2 columns as an Index would with the same 2 columns?

Thanks

Darren

Darren Harvey

Senior Developer

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