Which is best method to bind huge number records using RAS.

Question

Hi All ,
i am using CR XI R2 server to create report dynamicaly using sql query.
if follow the below method using DataDefModel.Table and giving table_name the object name in the database (RPT_PROCPLANNEDVSCOMPLETED is the SP in database having 4,00,000 records)., it populates and shows the report in expected time.
CrystalDecisions.ReportAppServer.DataDefModel.Table crTable;
rcDoc.ReportAppServer = "RAS"
rcDoc.New();
crTable = new CrystalDecisions.ReportAppServer.DataDefModel.Table();
CrystalDecisions.ReportAppServer.DataDefModel.ConnectionInfo crConnectionInfo;
crConnectionInfo = new CrystalDecisions.ReportAppServer.DataDefModel.ConnectionInfo();
crConnectionInfo = GetADOConnectionInfo(); // Connection propery bag set
crTable.ConnectionInfo = crConnectionInfo;
string table_name;
table_name = "RPT_PROCPLANNEDVSCOMPLETED";
crTable.Name = table_name;
crTable.Alias = table_name;
rcDoc.DatabaseController.AddTable(crTable, null);
now i need to pass dynamic sql query instead of giving object name. hence i followed this method
here DSReport1 is dataset i want to bind.
string tempFileName = Server.MapPath("New.xml");
            rcDoc.ReportAppServer = "RAS"
            rcDoc.New();
            DSReport1.WriteXml(tempFileName, XmlWriteMode.WriteSchema);
            CrystalDecisions.ReportAppServer.DataDefModel.ConnectionInfo crConnectionInfo;
            crConnectionInfo = new CrystalDecisions.ReportAppServer.DataDefModel.ConnectionInfo();
            ISCRTable table = DataSetConverter.Convert(DSReport1).Tables[0];
            crConnectionInfo = AddDataSourceUsingSchemaFile(rcDoc, tempFileName, "Views", DSReport1);
            table.ConnectionInfo = crConnectionInfo;
            rcDoc.DatabaseController.AddTable(table, null);
CrystalDecisions.ReportAppServer.DataDefModel.ConnectionInfo AddDataSourceUsingSchemaFile(ReportClientDocument rcDoc, string schema_file_name, string table_name, System.Data.DataSet data)
            PropertyBag crLogonInfo; PropertyBag crAttributes;
            CrystalDecisions.ReportAppServer.DataDefModel.ConnectionInfo crConnectionInfo;
            CrystalDecisions.ReportAppServer.DataDefModel.Table crTable;
            // create logon property
            crLogonInfo = new PropertyBag();
            crLogonInfo["XML File Path"] = schema_file_name;
            // create logon attributes
            crAttributes = new PropertyBag();
            crAttributes["Database DLL"] = "crdb_adoplus.dll";
            crAttributes["QE_DatabaseType"] = "ADO.NET (XML)";
            crAttributes["QE_ServerDescription"] = "NewDataSet";
            crAttributes["QE_SQLDB"] = true;
            crAttributes["QE_LogonProperties"] = crLogonInfo;
            // create connection info
            crConnectionInfo = new CrystalDecisions.ReportAppServer.DataDefModel.ConnectionInfo();
            crConnectionInfo.Kind = CrConnectionInfoKindEnum.crConnectionInfoKindCRQE;
            crConnectionInfo.Attributes = crAttributes;
            return crConnectionInfo;
this method is very slow compared to the 1 method. is this the right way of doing, or can anyone suggest better method. i also dont want to create xml file.
Thanks in ADVANCE
Padmanaban V

Answer 1

Hello, Padmanaban;
We do not recommend using ADO.NET for really large datasets. It is too much data to manipulate in memory.
The database is designed to do that and it works very efficiently as you have proven.
For such a large amount of data, use our OLEDB(ADO) driver and logon to the database directly. Make sure the query is run server side and returns only the required data to the report.
Here is an article with some good design tips:
[Click here|https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/701c069c-271f-2b10-c780-dacbd90b2dd8].
Elaine