async ValueTask EnsureMigrationTableExists()
 {
     try
     {
         await SqlTQueueCreator.CreateStagingQueue(connection, SqlConstants.TimeoutMigrationStagingTable, schema, connection.Database, preview : false);
     }
     catch (Exception e)
     {
         logger.LogError($"Unable to create the staging queue '{SqlConstants.TimeoutMigrationStagingTable}'. The following exception occured: {e.Message}");
         throw;
     }
 }
        public async ValueTask <MigrationCheckResult> AbleToMigrate(EndpointInfo endpoint)
        {
            var migrationCheckResult = new MigrationCheckResult();

            try
            {
                await EnsureConnectionOpen();
            }
            catch (Exception e)
            {
                migrationCheckResult.Problems.Add($"Unable to connect to the server or database using the provided connection string. Verify the connection string. The following exception occured: {e.Message}");
                return(migrationCheckResult);
            }

            var databaseName = connection.Database;

            try
            {
                await SqlTQueueCreator.CreateStagingQueue(connection, SqlConstants.TimeoutMigrationStagingTable, schema, databaseName, preview : true);
            }
            catch (Exception e)
            {
                migrationCheckResult.Problems.Add($"Attempt to verify whether the timeout migration staging table '{SqlConstants.TimeoutMigrationStagingTable}' could be created during migration mode failed. The following exception occured: {e.Message}");
            }

            var endpointDelayedTableName = SqlConstants.DelayedTableName(endpoint.EndpointName);

            if (await SqlTQueueCreator
                .DoesDelayedDeliveryTableExist(connection, endpointDelayedTableName, schema, databaseName)
                .ConfigureAwait(false) == null)
            {
                migrationCheckResult.Problems.Add($"Could not find delayed queue table with name '{endpointDelayedTableName}' for the endpoint '{endpoint.EndpointName}'");
            }

            return(migrationCheckResult);
        }