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PhysicalPlanCostModel, PlannerPhysicalPlanProvider and PhysicalEvidenceSnapshot had no caller once dag_export was gone, and Stage 3 never used them. asap_types::cost keeps only CostUnit; the annotation and workload-summary types were dag_export's. cache_hit_ratios moves into analytical_cost's tests, its only caller. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Stack: #574 → #620 → #618 → #621 → #627 → #625 → #628 → #632 → #634 → #616 → #617 → #622 → #624 → #629 → #630 → #631 → #633 → #635 → #636 → #637
Problem
PhysicalPlanCostModel,PlannerPhysicalPlanProviderandPhysicalEvidenceSnapshot(plan-selectioncost/physical_plan_cost_model.rs) priced plans for the legacy selection anddag_export. Withdag_exportgone (#616, #617), nothing calls them, and Stage 3 never did. Most ofasap_types::cost(cost annotations, workload cost summaries) was thedag_exportwire format.Changes
crates/plan-selection/src/cost/physical_plan_cost_model.rsand itscost/mod.rsentry.asap_types::cost: keep onlyCostUnit(still used by plan-selection'sCostModel). DeleteCostSource,BaselineRef,CostInput,CostAnnotation,benefit_ratio,total_cost,UnitMismatch,sum_workload_costs,WorkloadCostSummary,workload_cost_summaryand their tests.analytical_cost::cache_hit_ratios: delete it. Its only callers were tests. The result/buffer hit-ratio fields ofResolvedCacheProfile, which only it read, go too. The fail-closed cache tests now callresolve_cache_profiledirectly. Two tests drop their hit-ratio assertions and keep the CPU / scan-byte effect assertions.Not deleted, though no non-test code reaches them any more:
query_physical_lowering::lower_query_physical_dagand the analytical whole-DAG comparison (estimate_physical_dag_comparison), together with the storage-I/O / hand-off evidence they consume. They are the natural starting point for #615 (evidence-driven Stage 3 cost), so I left them for that issue to keep or delete.Stacked on #617.
Test plan
cargo fmt --all --checkcargo clippy --workspace --all-targets -- -D warningscargo test --workspace: 1615 passed, 0 failed, 13 ignored (after the rebase on main d4869a7; was 1612 passed, 13 ignored)🤖 Generated with Claude Code