shishengliang/lingniu-vehicle-ingest

Files

lingniu 08e2d8c0f0 feat(stats): store source mileage candidates

2026-07-08 14:25:09 +08:00

1.7 KiB

Raw Blame History

Task 2 Report: Candidate Mileage Schema And Writer

Outcome

Implemented Task 2 in go/vehicle-gateway/internal/stats.
Added candidate mileage schema, sample-to-candidate mapping, and the upsert writer.

RED Evidence

The focused candidate tests failed before implementation because the new symbols did not exist:

cd /Users/lingniu/project/ai-coding/lingniu-vehicle-ingest/go/vehicle-gateway
go test ./internal/stats -run 'TestSourceKey|TestUpsertSourceMileage' -count=1

Result:

undefined: SourceKey
undefined: SourceMileageSample
undefined: QualityOK
undefined: UpsertSourceMileage

GREEN Evidence

After implementation, the focused candidate tests passed:

cd /Users/lingniu/project/ai-coding/lingniu-vehicle-ingest/go/vehicle-gateway
go test ./internal/stats -run 'TestSourceKey|TestUpsertSourceMileage' -count=1

Result:

ok lingniu-vehicle-ingest/go/vehicle-gateway/internal/stats 0.556s

Package verification also passed:

cd /Users/lingniu/project/ai-coding/lingniu-vehicle-ingest/go/vehicle-gateway
go test ./internal/stats -count=1

Result:

ok lingniu-vehicle-ingest/go/vehicle-gateway/internal/stats 0.235s

Files Changed

go/vehicle-gateway/internal/stats/schema.go
go/vehicle-gateway/internal/stats/daily_metric.go
go/vehicle-gateway/internal/stats/source_mileage.go
go/vehicle-gateway/internal/stats/source_mileage_test.go

Self-Review

The candidate schema matches the brief's table shape and indexes.
SamplesFromEnvelope now carries EventTime and DeviceID, which the new candidate mapping needs.
The upsert SQL is focused on the candidate table and reuses the shared Execer interface.
No unrelated stats files were modified.