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Decimal overflow: bug of Oracle .NET Managed driver

See original GitHub issue

The Decimal column from Oracle DB can produce an overflow of the corresponding .NET decimal.

Eccezione non gestita: System.InvalidCastException: Cast specificato non valido.
   in Oracle.ManagedDataAccess.Client.OracleDataReader.GetDecimal(Int32 i)
   in Oracle.ManagedDataAccess.Client.OracleDataReader.GetValue(Int32 i)
   in Sql2Xlsx.Oracle.<Read>d__3.MoveNext() in C:\dev\SqlServer\Sql2Xlsx\Oracle.cs:riga 102

A workaround is needed.

// decimal overflow workaround 
field.ObjValue =
    field.DataType == "Decimal"?
    DR.GetDouble(i) :
    DR.GetValue(i);

Please forward and fix the code in the Oracle .NET Managed driver, thanks

Issue Analytics

State:
Created 3 years ago
Comments:7 (2 by maintainers)

Top GitHub Comments

1reaction

alexkehcommented, Jun 15, 2020

In the next DB release, ODP.NET will introduce a new SuppressGetDecimalInvalidCastException property that will allow suppressing this error and round off the result automatically.

If you wish to preserve the entire NUMBER value, you can do so today with Safe Type Mapping.

0reactions

giuliohomecommented, Nov 23, 2020

It should be a double, not a decimal, and it should not throw an exception… Indeed this is why I kept my workaround and not the proposed-above property