public void Extract_ProjectSpecificCatalogue_FilterReference()
        {
            //make the catalogue a custom catalogue for this project
            CustomExtractableDataSet.Project_ID = _project.ID;
            CustomExtractableDataSet.SaveToDatabase();

            var pipe = SetupPipeline();

            pipe.Name = "Extract_ProjectSpecificCatalogue_FilterReference Pipe";
            pipe.SaveToDatabase();

            var rootContainer = new FilterContainer(DataExportRepository);

            _selectedDataSet.RootFilterContainer_ID = rootContainer.ID;
            _selectedDataSet.SaveToDatabase();

            var filter = new DeployedExtractionFilter(DataExportRepository, "monkeys only", rootContainer);

            filter.WhereSQL = "SuperSecretThing = 'monkeys can all secretly fly'";
            filter.SaveToDatabase();
            rootContainer.AddChild(filter);

            //get rid of any lingering joins
            foreach (JoinInfo j in CatalogueRepository.GetAllObjects <JoinInfo>())
            {
                j.DeleteInDatabase();
            }

            //add the ability to join the two tables in the query
            var idCol      = _extractableDataSet.Catalogue.GetAllExtractionInformation(ExtractionCategory.Core).Single(c => c.IsExtractionIdentifier).ColumnInfo;
            var otherIdCol = CustomCatalogue.GetAllExtractionInformation(ExtractionCategory.ProjectSpecific).Single(e => e.GetRuntimeName().Equals("PrivateID")).ColumnInfo;

            new JoinInfo(CatalogueRepository, idCol, otherIdCol, ExtractionJoinType.Left, null);

            new SelectedDataSetsForcedJoin(DataExportRepository, _selectedDataSet, CustomTableInfo);

            //generate a new request (this will include the newly created column)
            _request = new ExtractDatasetCommand(_configuration, new ExtractableDatasetBundle(_extractableDataSet));

            var tbl = Database.ExpectTable("TestTable");

            tbl.Truncate();

            using (var blk = tbl.BeginBulkInsert())
            {
                var dt = new DataTable();
                dt.Columns.Add("PrivateID");
                dt.Columns.Add("Name");
                dt.Columns.Add("DateOfBirth");

                dt.Rows.Add(new object[] { "Priv_12345", "Bob", "2001-01-01" });
                dt.Rows.Add(new object[] { "Priv_wtf11", "Frank", "2001-10-29" });
                blk.Upload(dt);
            }

            ExtractionPipelineUseCase            useCase;
            IExecuteDatasetExtractionDestination results;

            Execute(out useCase, out results);

            var mainDataTableCsv = results.DirectoryPopulated.GetFiles().Single(f => f.Name.Equals("TestTable.csv"));

            Assert.IsNotNull(mainDataTableCsv);

            var lines = File.ReadAllLines(mainDataTableCsv.FullName);

            Assert.AreEqual("ReleaseID,Name,DateOfBirth", lines[0]);
            Assert.AreEqual("Pub_54321,Bob,2001-01-01", lines[1]);
            Assert.AreEqual(2, lines.Length);
        }