FIX: The setting for the precision and the scale of the data that is returned from a stored procedure output parameter is (38,0) when a null value is returned in SQL Server 2000 (892406)

MORE INFORMATION

Steps to reproduce the problem

using System;
using System.Data.SqlClient;
using System.Data;

namespace MyApplication
{
	/// <summary>
	/// Summary description for Class1.
	/// </summary>
	class MyClass
	{
		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main(string[] args)
		{
			
			string strConn = "Server=(local);Database=Northwind;" + 
				"Trusted_Connection=Yes;";
			SqlConnection cn = new SqlConnection(strConn);

			// Create stored procedure.
			PrepDb(cn);

			// Simple stored procedure.
			//    Input and output parameters decimal(19, 4).
			//    Sets the output parameter value to the input parameter value.
			SqlCommand cmd = cn.CreateCommand();
			cmd.CommandText = "ParameterPrecisionTest";
			cmd.CommandType = CommandType.StoredProcedure;
			SqlParameter pIn = cmd.Parameters.Add("@pIn", SqlDbType.Decimal);
			pIn.Precision = 19;
			pIn.Scale = 4;
			SqlParameter pOut = cmd.Parameters.Add("@pOut", SqlDbType.Decimal);
			pOut.Precision = 19;
			pOut.Scale = 4;
			pOut.Direction = ParameterDirection.Output;

			cn.Open();

			// Print value, precision, and scale for the output parameter.
			CheckParameter("Pre-execution", pOut);

			// The first call to the procedure returns 1.5.
			pIn.Value = 1.5;
			cmd.ExecuteNonQuery();
			CheckParameter("Returning 1.5", pOut);

			// The second call to the procedure returns null.
			pIn.Value = DBNull.Value;
			cmd.ExecuteNonQuery();
			CheckParameter("Returning DBNull", pOut);

			// The third call to the procedure returns 2.
			pIn.Value = 1.5;
			cmd.ExecuteNonQuery();
			CheckParameter("Returning 1.5", pOut);

			cn.Close();
		}
		static void CheckParameter(string Message, IDbDataParameter Parameter)
		{
			Console.WriteLine("\t{0}", Message);
			Console.WriteLine("\t\tValue:{0}\tPrecision:{1}\tScale:{2}", 
				(Parameter.Value != DBNull.Value) ? Parameter.Value : "DBNull", 
				Parameter.Precision, Parameter.Scale);
			Console.WriteLine();
		}

		static void PrepDb(IDbConnection Connection)
		{
			IDbCommand cmd = Connection.CreateCommand();
			Connection.Open();
			cmd.CommandText = "DROP PROCEDURE ParameterPrecisionTest";
			try {cmd.ExecuteNonQuery();} 
			catch {}
			cmd.CommandText = "CREATE PROCEDURE ParameterPrecisionTest " +
				"(@pIn decimal(19, 4), @pOut decimal(19, 4) OUTPUT) " +
				"AS SET @pOut = @pIn";
			cmd.ExecuteNonQuery();
			Connection.Close();
		}

	}
}