PostgreSQL Query Optimization: The Ultimate Guide to Building Efficient Queries

© Henrietta Dombrovskaya, Boris Novikov, Anna Bailliekova 2021

H. Dombrovskaya et al.PostgreSQL Query Optimizationhttps://doi.org/10.1007/978-1-4842-6885-8_11

11. Functions

Henrietta Dombrovskaya¹  , Boris Novikov² and Anna Bailliekova³

(1)

Braviant Holdings, Chicago, IL, USA

(2)

HSE University, Saint Petersburg, Russia

(3)

Zendesk, Madison, WI, USA

 

This chapter focuses on the most underused and misused of PostgreSQL objects—functions. Since all modern programming languages include user-defined functions, people often assume that database functions are cut from the same cloth and if you know how to write functions and when to write functions in an application programming language, you can apply this knowledge to PostgreSQL. This could not be further from ...