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|Reported by||Eric Toombs|
Body of first available message related to this bug follows.
The following bug has been logged on the website: Bug reference: 16065 Logged by: Eric Toombs Email address: (redacted) PostgreSQL version: 12.0 Operating system: any Description: The official documentation of EXPLAIN is here: https://www.postgresql.org/docs/current/sql-explain.html It's a start, but it doesn't actually define any of the operation nodes in the query plan tree it outputs, e.g. Seq Scan, Index Scan, Index Only Scan, HashAggregate, Nested Loop, Nested Loop Semi Join, Nested Loop Anti Join, etc.. Online, there are descriptions (i.e. guesses) of what each operation node is actually doing, but these descriptions are not authoritative. With authoritative definitions of each operation node, there would be no more guesswork, and DBAs could have a much more reliable mental model of what a query plan actually does.
|2019-10-18 15:01:55+00||PG Bug reporting form||BUG #16065: The operation nodes in query plans outputted by EXPLAIN have no authoritative definitions.|
|2019-10-20 03:51:44+00||Eric Toombs||Re: BUG #16065: The operation nodes in query plans outputted by EXPLAIN have no authoritative definitions.|