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Execution Plans in Postgres

Henrietta Dombrovskaya shows us an execution plan in Postgres:

In the last blog (When PostgreSQL Parameter Tuning is not the Answer), we compared several execution plans for a SQL statement as we made changes to parameters and indexes. Still, there was no mention of what an execution plan is, how one can obtain an execution plan for a query, and how to interpret the result. In this blog, we will take a deep dive into this topic.

Read on for the full article.