Question

I’m trying to call a stored procedure using ADO .NET and I’m getting the following error:

ORA-01460 – unimplemented or
unreasonable conversion requested

The stored procedure I’m trying to call has the following parameters:

param1 IN VARCHAR2,
param2 IN NUMBER,
param3 IN VARCHAR2,
param4 OUT NUMBER,
param5 OUT NUMBER,
param6 OUT NUMBER,
param7 OUT VARCHAR2

Below is the C# code I’m using to call the stored procedure:

    OracleCommand command = connection.CreateCommand();
    command.CommandType = CommandType.StoredProcedure;
    command.CommandText = "MY_PROC";

    OracleParameter param1 = new OracleParameter() { ParameterName = "param1", Direction = ParameterDirection.Input,
        Value = p1, OracleDbType = OracleDbType.Varchar2, Size = p1.Length };
    OracleParameter param2 = new OracleParameter() { ParameterName = "param2", Direction = ParameterDirection.Input,
        Value = p2, OracleDbType = OracleDbType.Decimal };
    OracleParameter param3 = new OracleParameter() { ParameterName = "param3", Direction = ParameterDirection.Input,
        Value = p3, OracleDbType = OracleDbType.Varchar2, Size = p3.Length };

    OracleParameter param4 = new OracleParameter() { ParameterName = "param4", Direction = ParameterDirection.Output,
        OracleDbType = OracleDbType.Decimal };
    OracleParameter param5 = new OracleParameter() { ParameterName = "param5", Direction = ParameterDirection.Output,
        OracleDbType = OracleDbType.Decimal};
    OracleParameter param6 = new OracleParameter() { ParameterName = "param6", Direction = ParameterDirection.Output,
        OracleDbType = OracleDbType.Decimal };
    OracleParameter param7 = new OracleParameter() { ParameterName = "param7", Direction = ParameterDirection.Output,
        OracleDbType = OracleDbType.Varchar2, Size = 32767 };

    command.Parameters.Add(param1);
    command.Parameters.Add(param2);
    command.Parameters.Add(param3);
    command.Parameters.Add(param4);
    command.Parameters.Add(param5);
    command.Parameters.Add(param6);
    command.Parameters.Add(param7);

    command.ExecuteNonQuery();

Any ideas what I’m doing wrong?

Answer 1

Not sure if it is relevant but SQL VARCHAR2 values are limited to 4000 (though PL/SQL can cope with 32 thousand)

You could try amending “Size = 32767” to something smaller (eg 500) and see if that works.

Also look into the sizes of the strings you are passing in. If one of them is 50000 characters, that might be the problem.