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Why does adding a JOIN completely modify the query planner behaviour?

score 115 · Answer 1 · 2025-01-07 21:16:01

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Why does adding a JOIN completely modify the query planner behaviour?

115 views Asked by Gagaro At 07 January 2025 at 21:16

score 382 · Answer 2 · 2024-12-27 01:19:26

Why does Postgresql not use Index Only Scan on my composite index in this case?

382 views Asked by Tomas Kulich At 27 December 2024 at 01:19

score 4721 · Answer 3 · 2025-01-03 18:48:48

Mysql index hints in Hibernate query

4.7k views Asked by Vijay Kansal At 03 January 2025 at 18:48

score 361 · Answer 4 · 2025-01-03 18:59:28

Create MySQL Workbench query plan image from command line / terminal

361 views Asked by Stranger At 03 January 2025 at 18:59

score 80 · Answer 5 · 2025-01-03 18:50:32

Query planner differences in similar queries

80 views Asked by moray95 At 03 January 2025 at 18:50

score 278 · Answer 6 · 2024-12-30 16:46:13

PostgreSQL 12.4 query planner ignores sub-partition constraint, resulting in table scan

278 views Asked by Niels Voorhoeve At 30 December 2024 at 16:46

score 733 · Answer 7 · 2025-01-03 19:07:06

Postgresql, manually use analyze $table_name after each update both on indexes or on structure to update query planner? Really?

733 views Asked by Fred Hors At 03 January 2025 at 19:07

score 74 · Answer 8 · 2025-01-03 19:02:22

Postgres order of execution in query that computes a function and locks rows

74 views Asked by Andrew At 03 January 2025 at 19:02

score 1291 · Answer 9 · 2025-01-03 18:53:50

How many disk pages are read by a query in Postgres?

1.2k views Asked by Settembre Nero At 03 January 2025 at 18:53

score 758 · Answer 10 · 2025-01-03 18:52:19

Is there a shared query plan cache for Postgres?

758 views Asked by Rol At 03 January 2025 at 18:52

TechQA.

List Question

Why does adding a JOIN completely modify the query planner behaviour?

Why does Postgresql not use Index Only Scan on my composite index in this case?

Mysql index hints in Hibernate query

Create MySQL Workbench query plan image from command line / terminal

Query planner differences in similar queries

PostgreSQL 12.4 query planner ignores sub-partition constraint, resulting in table scan

Postgresql, manually use analyze $table_name after each update both on indexes or on structure to update query planner? Really?

Postgres order of execution in query that computes a function and locks rows

How many disk pages are read by a query in Postgres?

Is there a shared query plan cache for Postgres?

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