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PostgreSQL 10 Administration Cookbook - Fourth Edition
book

PostgreSQL 10 Administration Cookbook - Fourth Edition

by Simon Riggs, Gianni Ciolli
May 2018
Intermediate to advanced content levelIntermediate to advanced
576 pages
30h 25m
English
Packt Publishing
Content preview from PostgreSQL 10 Administration Cookbook - Fourth Edition

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Consider one more scenario: an application runs a huge number of small lookup queries. This can easily happen with modern Object Relational Mappers (ORMs) and other toolkits that do a lot of work for the programmer, but at the same time, hide a lot of what is happening.

For example, if you define an HTML report over a query in a templating language, and then define a lookup function to resolve an ID inside the template, you may end up with a form that performs a separate, small lookup for each row displayed, even when most of the values looked up are the same. This doesn't usually pose a big problem for the database, as queries of the SELECT name FROM departments WHERE id = 7 form are really fast when the row for id = 7 is in ...

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Publisher Resources

ISBN: 9781788474924Supplemental Content