AccessViolation in OdbcDataReader.GetOrdinal(string name) if I call stored procedure

I'm getting AccessViolation error when I'm trying to get the fields position with OdbcDataReader.GetOrdinal(string method) if result set is generated by stored procedure. With plain SELECT statements everything is ok.

The exception stack trace and failing code is below.

– Exception –

System.AccessViolationException was unhandled
HResult=-2147467261
Message=Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Source=System.Data
StackTrace:
at System.Data.Common.UnsafeNativeMethods.SQLColAttributeW(OdbcStatementHandle StatementHandle, Int16 ColumnNumber, Int16 FieldIdentifier, CNativeBuffer CharacterAttribute, Int16 BufferLength, Int16& StringLength, IntPtr& NumericAttribute)
at System.Data.Odbc.OdbcDataReader.GetColAttributeStr(Int32 i, SQL_DESC v3FieldId, SQL_COLUMN v2FieldId, HANDLER handler)
at System.Data.Odbc.OdbcDataReader.GetName(Int32 i)
at System.Data.ProviderBase.FieldNameLookup..ctor(IDataRecord reader, Int32 defaultLocaleID)
at System.Data.Odbc.OdbcDataReader.GetOrdinal(String value)
at MariaDbOdbcConnectorTest1.Program.TestGetOrdinalWithStoredProcedure() in d:\Work\Project1\Troubleshooting\MariaDbOdbcConnector\MariaDbOdbcConnectorTest1\MariaDbOdbcConnectorTest1\Program.cs:line 94
at MariaDbOdbcConnectorTest1.Program.Main(String[] args) in d:\Work\Project1\Troubleshooting\MariaDbOdbcConnector\MariaDbOdbcConnectorTest1\MariaDbOdbcConnectorTest1\Program.cs:line 17
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException:

– Failing Code –

public static void TestGetOrdinalWithStoredProcedure()
{
Console.WriteLine("_ODBC_0.9.1 test#2__");
using (IDbConnection connection = new OdbcConnection())
{
connection.ConnectionString = "DSN=MariaDB10";
connection.Open();

using (IDbCommand command = connection.CreateCommand())

{ command.CommandType = CommandType.Text; command.CommandText = "DROP PROCEDURE IF EXISTS test1"; command.ExecuteNonQuery(); command.CommandText = @" CREATE PROCEDURE test1() BEGIN SELECT 1 AS A; END; "; command.ExecuteNonQuery(); }

using (IDbCommand command = connection.CreateCommand())
{
command.CommandType = CommandType.StoredProcedure;
command.CommandText = "CALL test1";
using (IDataReader reader = command.ExecuteReader())
{
while (reader.Read())
{

int position = reader.GetOrdinal("A"); // This fails
Console.WriteLine("

{0}", reader.GetInt32(position));
// Console.WriteLine("{0}

", reader.GetInt32(0)); // This works fine
}
}
}
}
}

– Working Code –

public static void TestGetOrdinal()
{
Console.WriteLine("_ODBC_0.9.1 test#1__");
using (IDbConnection connection = new OdbcConnection())
{
connection.ConnectionString = "DSN=MariaDB10";
connection.Open();
using (IDbCommand command = connection.CreateCommand())
{
command.CommandType = CommandType.Text;
command.CommandText = "SELECT 1 AS A";
using (IDataReader reader = command.ExecuteReader())
{
while (reader.Read())
{
int position = reader.GetOrdinal("A"); // works fine
Console.WriteLine("

{0}

", reader.GetInt32(position));
}
}
}
}
}