dialect

const (
	// DBVerified: integration tests run it against the real database.
	DBVerified Evidence = "db_verified"
	// CoreVerified: shared-layer tests cover it; no test on this database.
	CoreVerified Evidence = "core_verified"
	// Declared: stated, not independently tested.
	Declared Evidence = "declared"
	// External: it rests on database or deployment configuration the server
	// does not manage.
	External Evidence = "external"
)

const (
	// Returning: INSERT ... RETURNING reads the inserted row back in one
	// statement (otherwise exec + the last insert id).
	Returning Key = "write.returning"
	// Explain: EXPLAIN yields a numeric estimate the cost gate can score.
	Explain Key = "cost.explain"
	// ExplainAccurate: the estimates are trustworthy enough to gate on
	// without explain fail-closed.
	ExplainAccurate Key = "cost.explain.accurate"
	// ExplainAnalyze: EXPLAIN ANALYZE sampling for estimate feedback.
	ExplainAnalyze Key = "cost.explain.analyze"
	// TimeoutRead: a read statement stops at cost.queryTimeout on the server.
	TimeoutRead Key = "limit.timeout.read"
	// TimeoutWrite: a writing statement stops at cost.queryTimeout on the
	// server.
	TimeoutWrite Key = "limit.timeout.write"
	// UnkeyedWrite: the database refuses UPDATE/DELETE without a key, as a
	// backstop behind the gate's WriteGuard.
	UnkeyedWrite Key = "limit.unkeyedWrite"
)

const (
	// Unsupported: the server does not provide it.
	Unsupported Strength = "unsupported"
	// BestEffort: the server tries, but no hard guarantee rests on it.
	BestEffort Strength = "best_effort"
	// Enforced: an assembled, tested mechanism that does not silently degrade.
	Enforced Strength = "enforced"
)