Bug #115325 optimizer_max_subgraph_pairs not documented

• Submitted: 13 Jun 2024 20:13
• Modified: 16 Jul 2024 11:56
• Reporter: Dov Endress
• Status: Not a Bug
• Category: MySQL Server: Documentation
• Severity: S3 (Non-critical)
• Version: 8.0.30, 8.4
• OS: Any
• CPU Architecture: Any

[13 Jun 2024 20:13] Dov Endress

Description:
optimizer variables are generally found with other general server variables. For example for optimizer_switch in 8.0: https://dev.mysql.com/doc/refman/8.0/en/server-system-variables.html#sysvar_optimizer_swit...

However I can find no mention of optimizer_max_subgraph_pairs outside the source code documentation: https://dev.mysql.com/doc/dev/mysql-server/latest/sys__vars_8cc.html#abffabb9f3f88e05334d9...

Searching the manual returns no results, likewise search engines only bring up links to the code docs.

I believe this variable was introduced in 8.0.30. That is the first version I see it available.

How to repeat:
Search the documentation for optimizer_max_subgraph_pairs. Check the documentation at https://dev.mysql.com/doc/refman/8.0/en/server-system-variables.html (8.0) or https://dev.mysql.com/doc/refman/8.4/en/server-system-variables.html (8.4)

Suggested fix:
Please add an appropriate entry in the documentation for this variable.

Cheers!

[14 Jun 2024 6:00] MySQL Verification Team

Hello Dov Endress,

Thank you for the report and feedback.

regards,
Umesh

[16 Jul 2024 11:56] Jon Stephens

This variable is used only with a feature that is not available or supported in the standard MySQL Server, therefore it is not included in documentation.

Not a bug.

Thanks.