Function InsertDropRecord

edgraph/server.go:338–351

InsertDropRecord is used to insert a helper record when a DROP operation is performed. This helper record lets us know during backup that a DROP operation was performed and that we need to write this information in backup manifest. So that while restoring from a backup series, we can create an exact

(ctx context.Context, dropOp string)

// then restoring from the incremental backup of such a DB would restore even the dropped
// data back. This is also used to capture the delete namespace operation during backup.
func InsertDropRecord(ctx context.Context, dropOp string) error {
	_, err := (&Server{}).doQuery(context.WithValue(ctx, IsGraphql, true), &Request{
		req: &api.Request{
			Mutations: []*api.Mutation{{
				Set: []*api.NQuad{{
					Subject:     "_:r",
					Predicate:   "dgraph.drop.op",
					ObjectValue: &api.Value{Val: &api.Value_StrVal{StrVal: dropOp}},
				}},
			}},
			CommitNow: true,
		}, doAuth: NoAuthorize})
	return err
}

// Alter handles requests to change the schema or remove parts or all of the
// data. It enforces the admin-IP-whitelist and ACL authorization checks.