public Task <T> ExecuteScalarAsync <T>(Sql sql)
 {
     return(RetryPolicy.ExecuteAsync(() => InternalDb.ExecuteScalarAsync <T>(sql)));
 }
 public Task <T> ExecuteScalarAsync <T>(string sql, object[] args)
 {
     return(RetryPolicy.ExecuteAsync(() => InternalDb.ExecuteScalarAsync <T>(sql, args)));
 }