Beyond Joins and Indexes | POSETTE 2024

Video Description

Video of a conference talk on the Postgres Query Optimizer by Bruce Momjian at POSETTE: An Event for Postgres 2024. Bruce's presentation Explaining the Postgres Query Optimizer covers the details of query optimization, optimizer statistics, joins, and indexes. This talk covers 42 other operations the optimizer can choose to handle complex queries, large data sets, and to enhance performance. These include merge append, gather, memoize, and hash aggregate. It explains their purpose and shows queries that can generate these operations. Bruce Momjian is co-founder and core team member of the PostgreSQL Global Development Group, and has worked on PostgreSQL since 1996. He has been employed by EDB since 2006. He has spoken at many international open-source conferences and is the author of PostgreSQL: Introduction and Concepts, published by Addison-Wesley. Prior to his involvement with PostgreSQL, Bruce worked as a consultant, developing custom database applications for some of the world's largest law firms. As an academic, Bruce holds a Masters in Education, an honorary doctorate, was a high school computer science teacher, and lectures internationally. Chapters: 00:00 - Intro 01:23 - What will be covered (numbered list) 03:03 - #1-3 Result ... Function Scan 04:01 - #4-7 Incremental Sort ... Merge Append 07:02 - #8-10 Subquery Scan ... SetOp 08:39 - #11-12 Materialize .. Memoize 12:26 - #13-18 Group ... WindowAgg 15:13 - #19-26 Parallel Seq Scan ... Parallel Hash Join 19:58 - #27-29 CTE Scan ... Recursive Union 21:54 - #30-35 ProjectSet ... Tid Scan 23:13 - #36-39 Insert ... Merge 23:53 - #40-42 Semi Join ... SubPlan 25:25 - #43 Others 25:49 - Conclusion 📕 Everything you need to know about POSETTE: An Event for Postgres 2024 can be found at: https://aka.ms/posette ✅ Learn more: Watch more POSETTE talks: https://aka.ms/posette-playlist-2024 📌 Let’s connect: X – @PosetteConf https://x.com/PosetteConf Mastodon - @posetteconf https://mastodon.social/@posetteconf Threads – @posetteconf https://www.threads.net/@posetteconf 🔔 Subscribe to the POSETTE News: https://aka.ms/posette-subscribe #PosetteConf #PostgreSQL #Database Presenters: Bruce Momjian, EDB Connect: Bruce Momjian: https://www.linkedin.com/in/bruce-momjian-74ab7b1/