Shared: Disable dynamic reordering for select predicate - #22486
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Copilot review overview
🟢 Approval recommended
The narrowly scoped pragma correctly targets the reported regression without changing default behavior.
Review tier: Balanced
Findings: None
What changed in this PR
Disables dynamic join ordering for the problematic HTTP request URL-part dispatch predicate.
Changes:
- Adds
no_dynamic_join_ordertoRequest::Range.getAUrlPart.
| File | Description |
|---|---|
shared/concepts/codeql/concepts/ConceptsShared.qll |
Applies the targeted join-ordering safeguard. |
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hvitved
approved these changes
Sep 2, 2026
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We are working on a new dynamic join orderer for CodeQL that join orders predicates at evaluation-time using run-time cardinality information instead of relying on a statically chosen join order decided at compilation-time. At the moment the dispatch predicate for the
...Request::Range.getAUrlPartmethod is join ordered badly by the dynamic join orderer, leading to a catastrophic join regression forruby-opal. This PR disables dynamic join ordering for the affected predicate, while we work on improving the dynamic join orderer.Dynamic join ordering is still disabled by default during compilation and evaluation and the
no_dynamic_join_orderpragma has no effect on compilation when dynamic join ordering is not explicitly enabled during compilation.