Utility for efficient IN SQL queries
What does this MR do?
This change is not user-facing.
The MR introduces a utility class for speeding up sorted IN queries, especially group-level queries. The technique is described in the document within the MR and there is a slide deck here: https://docs.google.com/presentation/d/1r86k8W-AMdBOpPAESkD-c2Q2NcCtq6JbO5P17sRgoBc/edit#slide=id.g29a70c6c35_0_68
It was quite challenging to implement a generic solution that can be easily adapted for various use cases which results in a huge MR. Unfortunately, I don't see a good way to split it at this point.
Does this MR meet the acceptance criteria?
Conformity
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I have properly separated EE content from FOSS, or this MR is FOSS only. (Where should EE code go?) -
I have added information for database reviewers in the MR description, or it's not needed. (Does this MR have database related changes?) -
I have self-reviewed this MR per code review guidelines. -
This MR does not harm performance, or I have asked a reviewer to help assess the performance impact. (Merge request performance guidelines) -
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This change is backwards compatible across updates, or this does not apply.
Availability and Testing
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I have informed the Infrastructure department of a default or new setting change per definition of done, or it's not needed.
Security
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Label as security and @ mention @gitlab-com/gl-security/appsec -
The MR includes necessary changes to maintain consistency between UI, API, email, or other methods -
Security reports checked/validated by a reviewer from the AppSec team
Related to #335388 (closed)