// getDMLRouting updates the route with the necessary routing
// info. If it cannot find a unique route, then it returns an error.
func getDMLRouting(where *sqlparser.Where, route *engine.Route) error {
if where == nil {
return errors.New("unsupported: multi-shard where clause in DML")
}
for _, index := range route.Table.Ordered {
if !vindexes.IsUnique(index.Vindex) {
continue
}
if values := getMatch(where.Expr, index.Column); values != nil {
route.Vindex = index.Vindex
route.Values = values
return nil
}
}
return errors.New("unsupported: multi-shard where clause in DML")
}
