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

score 98 · Answer 1 · 2025-01-07 21:16:01

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

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

score 371 · Answer 2 · 2024-12-27 01:19:26

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

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

score 4712 · 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 350 · Answer 4 · 2025-01-03 18:59:28

Create MySQL Workbench query plan image from command line / terminal

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

score 68 · Answer 5 · 2025-01-03 18:50:32

Query planner differences in similar queries

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

score 265 · Answer 6 · 2024-12-30 16:46:13

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

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

score 724 · 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?

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

score 61 · Answer 8 · 2025-01-03 19:02:22

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

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

score 1280 · 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 743 · Answer 10 · 2025-01-03 18:52:19

Is there a shared query plan cache for Postgres?

743 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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