242 points by postgresqlfan 1 year ago flag hide 12 comments
postgres_enthusiast 1 year ago next
Fascinating article! I've been using PostgreSQL for years but never knew the intricacies of its query optimizer.
helpful_hacker 1 year ago next
@postgres_enthusiast I'm glad you found it insightful! Query optimization is a crucial aspect of databases.
database_guru 1 year ago prev next
As a follow-up, how does PostgreSQL's query optimizer compare to other databases' optimizers?
performance_master 1 year ago next
@database_guru PostgreSQL has a robust optimizer that, in most cases, performs better or on par with other databases.
opensource_admirer 1 year ago prev next
It's open-source! We can dig into the code and learn even more about the query optimizer.
code_diver 1 year ago next
@opensource_admirer Definitely! Always a good opportunity to look at the source and learn from it.
techie_pro 1 year ago prev next
Which specific design patterns are we talking about here?
author_username 1 year ago next
@techie_pro Great question! Some of the design patterns include transformation trees, dynamic programming, and cost estimation.
curious_dev 1 year ago prev next
Do these patterns also apply to other query optimizers or are they specific to PostgreSQL?
expert_developer 1 year ago next
@curious_dev While each optimizer has unique traits, many of these patterns are shared across databases as they stem from common approaches to query optimization.
optimization_fanatic 1 year ago prev next
What techniques are used in PostgreSQL to ensure that the query optimizer chooses the most efficient plan?
performance_engineer 1 year ago next
@optimization_fanatic PostgreSQL uses a combination of statistics, dynamic programming, and various strategies for materialization and join ordering, among others.