[skip ci] Update comment for drop index (#8960)

Signed-off-by: yudong.cai <yudong.cai@zilliz.com>
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Cai Yudong 2021-10-02 09:59:55 +08:00 committed by GitHub
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@ -265,6 +265,8 @@ type RootCoord interface {
// The `ErrorCode` of `Status` is `Success` if drop index successfully;
// otherwise, the `ErrorCode` of `Status` will be `Error`, and the `Reason` of `Status` will record the fail cause.
// error is always nil
//
// RootCoord forwards this request to IndexCoord to drop index
DropIndex(ctx context.Context, req *milvuspb.DropIndexRequest) (*commonpb.Status, error)
// CreateAlias notifies RootCoord to create an alias for the collection