November 2019
Beginner to intermediate
470 pages
11h 59m
English
Content preview from Mastering PostgreSQL 12 - Third Edition
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Evaluating join options
The planner has a couple of options here, so let's take this opportunity to understand what can go wrong if trivial approaches are used.
Suppose the planner just steams ahead and calculates the output of the view. What is the best way to join 100 million rows with 200 million rows?
In this section, a couple of (not all) join options will be discussed to show you what PostgreSQL is able to do.
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