Readarr/src/NzbDrone.Core/Housekeeping/Housekeepers/CleanupOrphanedDownloadClientStatus.cs

using Dapper;
using NzbDrone.Core.Datastore;

namespace NzbDrone.Core.Housekeeping.Housekeepers
{
    public class CleanupOrphanedDownloadClientStatus : IHousekeepingTask
    {
        private readonly IMainDatabase _database;

        public CleanupOrphanedDownloadClientStatus(IMainDatabase database)
        {
            _database = database;
        }

        public void Clean()
        {
            var mapper = _database.OpenConnection();

            mapper.Execute(@"DELETE FROM ""DownloadClientStatus""
                                     WHERE ""Id"" IN (
                                     SELECT ""DownloadClientStatus"".""Id"" FROM ""DownloadClientStatus""
                                     LEFT OUTER JOIN ""DownloadClients""
                                     ON ""DownloadClientStatus"".""ProviderId"" = ""DownloadClients"".""Id""
                                     WHERE ""DownloadClients"".""Id"" IS NULL)");
        }
    }
}