fix sql

juicedata · Dec 5, 2024 · a547c6c · a547c6c
1 parent f779d6e
commit a547c6c
Showing 1 changed file with 8 additions and 5 deletions.
diff --git a/pkg/meta/sql.go b/pkg/meta/sql.go
@@ -939,15 +939,18 @@ func (m *dbMeta) doSyncUsedSpace(ctx Context) error {
 		return err
 	}
 	if err := m.roTxn(func(s *xorm.Session) error {
-		queryMap, err := s.QueryString("SELECT SUM(length) FROM jfs_node WHERE inode IN (SELECT inode FROM jfs_sustained)")
+		queryResultMap, err := s.QueryString("SELECT SUM(length) FROM jfs_node WHERE inode IN (SELECT inode FROM jfs_sustained)")
 		if err != nil {
 			return err
 		}
-		value, err := strconv.ParseInt(queryMap[0]["SUM(length)"], 10, 64)
-		if err != nil {
-			return err
+		// SUM(length) may return empty string if there is no record
+		if v := queryResultMap[0]["SUM(length)"]; v != "" {
+			value, err := strconv.ParseInt(v, 10, 64)
+			if err != nil {
+				return err
+			}
+			used += align4K(uint64(value))
 		}
-		used += align4K(uint64(value))
 		return nil
 	}); err != nil {
 		return err