address comment

pingcap · Dec 5, 2018 · fd9864d · fd9864d
1 parent 594b5a4
commit fd9864d
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/util/admin/admin.go b/util/admin/admin.go
@@ -86,6 +86,7 @@ func GetDDLInfo(txn kv.Transaction) (*DDLInfo, error) {
 func isJobRollbackable(job *model.Job, id int64) error {
 	switch job.Type {
 	case model.ActionDropIndex:
+		// We can't cancel if index current state is in StateDeleteOnly or StateDeleteReorganization, otherwise will cause inconsistent between record and index.
 		if job.SchemaState == model.StateDeleteOnly ||
 			job.SchemaState == model.StateDeleteReorganization {
 			return ErrCannotCancelDDLJob.GenWithStackByArgs(id)