[功能] 添加遗留观察性索引和表的删除逻辑，优化数据库迁移过程

openflare_server/model/main.go

@@ -320,19 +320,88 @@ func renameLegacyObservabilityShardTables(db *gorm.DB) error {
 			if err := db.Migrator().RenameTable(table, legacyTable); err != nil {
 				return fmt.Errorf("rename sharded table %s to %s failed: %w", table, legacyTable, err)
 			}
+			if err := dropLegacyObservabilitySecondaryIndexes(db, legacyTable); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func dropLegacyObservabilitySecondaryIndexes(db *gorm.DB, table string) error {
+	db = sessionIgnoringSharding(db)
+	if db == nil {
+		return fmt.Errorf("database handle is nil")
+	}
+	backend := baseDialector(db).Name()
+	indexes := make([]string, 0)
+	switch backend {
+	case "sqlite":
+		if err := db.Raw(
+			`SELECT name FROM sqlite_master WHERE type = 'index' AND tbl_name = ? AND name LIKE 'idx_%'`,
+			table,
+		).Scan(&indexes).Error; err != nil {
+			return fmt.Errorf("list indexes for %s failed: %w", table, err)
+		}
+	case "postgres":
+		if err := db.Raw(
+			`SELECT indexname FROM pg_indexes WHERE schemaname = current_schema() AND tablename = ? AND indexname LIKE 'idx_%'`,
+			table,
+		).Scan(&indexes).Error; err != nil {
+			return fmt.Errorf("list indexes for %s failed: %w", table, err)
+		}
+	default:
+		return fmt.Errorf("unsupported database backend %s", backend)
+	}
+	for _, indexName := range indexes {
+		if err := db.Exec(fmt.Sprintf(`DROP INDEX IF EXISTS "%s"`, indexName)).Error; err != nil {
+			return fmt.Errorf("drop legacy index %s failed: %w", indexName, err)
+		}
+	}
+	return nil
+}
+
+func autoMigrateObservabilityShardTables(db *gorm.DB) error {
+	db = sessionIgnoringSharding(db)
+	if db == nil {
+		return fmt.Errorf("database handle is nil")
+	}
+	dialector := baseDialector(db)
+	if dialector == nil {
+		return fmt.Errorf("database dialector is nil")
+	}
+	type shardedTable struct {
+		model any
+		base  string
+	}
+	tables := []shardedTable{
+		{model: &NodeMetricSnapshot{}, base: "node_metric_snapshots"},
+		{model: &NodeRequestReport{}, base: "node_request_reports"},
+		{model: &NodeAccessLog{}, base: "node_access_logs"},
+	}
+	for _, item := range tables {
+		for _, table := range observabilityShardTables(item.base) {
+			tx := db.Table(table)
+			if err := dialector.Migrator(tx).AutoMigrate(item.model); err != nil {
+				return fmt.Errorf("auto migrate sharded table %s failed: %w", table, err)
+			}
 		}
 	}
 	return nil
 }
 
 func dropLegacyObservabilityShardTables(db *gorm.DB) error {
+	db = sessionIgnoringSharding(db)
+	if db == nil {
+		return fmt.Errorf("database handle is nil")
+	}
 	for _, baseTable := range shardedObservabilityBaseTables() {
 		for _, table := range observabilityShardTables(baseTable) {
 			legacyTable := legacyObservabilityShardTableName(table)
 			if !db.Migrator().HasTable(legacyTable) {
 				continue
 			}
-			if err := db.Migrator().DropTable(legacyTable); err != nil {
+			if err := db.Exec(fmt.Sprintf(`DROP TABLE IF EXISTS "%s"`, legacyTable)).Error; err != nil {
 				return fmt.Errorf("drop legacy sharded table %s failed: %w", legacyTable, err)
 			}
 		}
@@ -461,10 +530,11 @@ func migrateObservabilityShardsToID(db *gorm.DB, backend string) error {
 	if db == nil {
 		return fmt.Errorf("database handle is nil")
 	}
+	_ = backend
 	if err := renameLegacyObservabilityShardTables(db); err != nil {
 		return err
 	}
-	if err := applyCurrentSchema(db, backend); err != nil {
+	if err := autoMigrateObservabilityShardTables(db); err != nil {
 		return err
 	}
 	if err := migrateLegacyNodeMetricSnapshots(db); err != nil {