fix: expose planner/activity stats in offline mode

Author: radim

cmd/dryrun/main.go

@@ -851,6 +851,14 @@ func mcpServeCmd() *cobra.Command {
 					effectiveSchemaFile, len(snap.Tables))
 				server = drmcp.NewOfflineServer(snap, lintCfg)
 				server.SetSchemaCandidates(candidates)
+				// history.db carries planner/activity stats; without it offline tools (vacuum_health, compare_nodes…) see nil sizing
+				if h, err := history.OpenDefault(); err == nil {
+					server.SetHistory(h)
+					server.SetSnapshotKey(resolveSnapshotKey())
+					if server.BootstrapFromHistory(context.Background()) {
+						fmt.Fprintln(os.Stderr, "dryrun: attached planner/activity stats from history.db")
+					}
+				}
 			case flagDB != "":
 				ctx := context.Background()
 				conn, err := schema.Connect(ctx, flagDB)

internal/mcp/server.go

@@ -70,6 +70,25 @@ func (s *Server) SetSnapshotKey(key history.SnapshotKey) {
 	s.snapshotKey = key
 }
 
+// Lets offline mode wire in history.db after construction
+func (s *Server) SetHistory(hist *history.Store) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	s.history = hist
+}
+
+func (s *Server) BootstrapFromHistory(ctx context.Context) bool {
+	a, ok := s.loadAnnotatedFromHistory(ctx)
+	if !ok || a == nil || a.Schema == nil {
+		return false
+	}
+	s.mu.Lock()
+	s.annotated = a
+	s.uninitialized = false
+	s.mu.Unlock()
+	return true
+}
+
 func (s *Server) loadAnnotatedFromHistory(ctx context.Context) (*schema.AnnotatedSchema, bool) {
 	s.mu.RLock()
 	hist := s.history

internal/schema/vacuum.go

@@ -6,6 +6,7 @@ import (
 	"sort"
 	"strconv"
 	"strings"
+	"time"
 )
 
 type (
@@ -33,9 +34,17 @@ type (
 		EffectiveScale            float64  `json:"effective_scale_factor"`
 		EffectiveAnalyzeThreshold int64    `json:"effective_analyze_threshold"`
 		EffectiveAnalyzeScale     float64  `json:"effective_analyze_scale_factor"`
-		AnalyzeTriggerAt          float64  `json:"analyze_trigger_at"`
-		AutovacuumEnabled         bool     `json:"autovacuum_enabled"`
-		Recommendations           []string `json:"recommendations,omitempty"`
+		AnalyzeTriggerAt          float64    `json:"analyze_trigger_at"`
+		AutovacuumEnabled         bool       `json:"autovacuum_enabled"`
+		LastVacuum                *time.Time `json:"last_vacuum,omitempty"`
+		LastAutovacuum            *time.Time `json:"last_autovacuum,omitempty"`
+		LastAnalyze               *time.Time `json:"last_analyze,omitempty"`
+		LastAutoanalyze           *time.Time `json:"last_autoanalyze,omitempty"`
+		VacuumCount               int64      `json:"vacuum_count"`
+		AutovacuumCount           int64      `json:"autovacuum_count"`
+		AnalyzeCount              int64      `json:"analyze_count"`
+		AutoanalyzeCount          int64      `json:"autoanalyze_count"`
+		Recommendations           []string   `json:"recommendations,omitempty"`
 	}
 )
 
@@ -187,6 +196,16 @@ func AnalyzeVacuumHealth(a *AnnotatedSchema) []VacuumHealth {
 			AnalyzeTriggerAt:          analyzeTrigger,
 			AutovacuumEnabled:         avEnabled,
 		}
+		if activity != nil {
+			vh.LastVacuum = activity.LastVacuum
+			vh.LastAutovacuum = activity.LastAutovacuum
+			vh.LastAnalyze = activity.LastAnalyze
+			vh.LastAutoanalyze = activity.LastAutoanalyze
+			vh.VacuumCount = activity.VacuumCount
+			vh.AutovacuumCount = activity.AutovacuumCount
+			vh.AnalyzeCount = activity.AnalyzeCount
+			vh.AutoanalyzeCount = activity.AutoanalyzeCount
+		}
 
 		if !avEnabled {
 			vh.Recommendations = append(vh.Recommendations,