OracleDataAdapter.Fill and arithmetic overflow exception

Question

Hi to all!
In my ASP.NET 2.0 web-application I use ODP.NET to working with Oracle DB. When I execute a pipelined stored procedure an "Arithmetic pverflow exception" occures. Here is exception stack trace:
в Oracle.DataAccess.Types.DecimalConv.GetDecimal(IntPtr numCtx)
в Oracle.DataAccess.Client.OracleDataReader.GetDecimal(Int32 i)
в Oracle.DataAccess.Client.OracleDataReader.GetValue(Int32 i)
в Oracle.DataAccess.Client.OracleDataReader.GetValues(Object[] values)
в System.Data.ProviderBase.DataReaderContainer.CommonLanguageSubsetDataReader.GetValues(Object[] values)
в System.Data.ProviderBase.SchemaMapping.LoadDataRow()
в System.Data.Common.DataAdapter.FillLoadDataRow(SchemaMapping mapping)
в System.Data.Common.DataAdapter.FillFromReader(DataSet dataset, DataTable datatable, String srcTable, DataReaderContainer dataReader, Int32 startRecord, Int32 maxRecords, DataColumn parentChapterColumn, Object parentChapterValue)
в System.Data.Common.DataAdapter.Fill(DataTable[] dataTables, IDataReader dataReader, Int32 startRecord, Int32 maxRecords)
в System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior)
в System.Data.Common.DbDataAdapter.Fill(DataTable[] dataTables, Int32 startRecord, Int32 maxRecords, IDbCommand command, CommandBehavior behavior)
в System.Data.Common.DbDataAdapter.Fill(DataTable dataTable)
If I call this stored procedure from SqlNavigator it works properly. Hovewer I see that the data of one column of result cursor looks like 55,58554033940333204184424641611784101. If I round data of this column, the Fill method of OracleDataAdapter works without any exceptions. How can i solve this problem?
Edited by: yoyoseek on Sep 3, 2008 2:09 AM

Answer 1

Hi
The reason you are seeing this, is because Oracle Number has a greater precision than .NET Decimal.
There are a couple of ways out:
* Convert manually to_char instead of number out.
* Using OracleDataAdapter.SafeMapping, described here http://stanford.edu/dept/itss/docs/oracle/10g/win.101/b10117/features009.htm
* Round down to the precision of .NET decimal before returning.
Morten
Edited by: gulhaugen on Sep 3, 2008 1:43 PM