// GetStatementHandle
// ------------------
// Try to return a cached statement handle.
//
// Creates a CmdWrapper object if necessary
// If no handle is available a handle will be allocated.
// Bindings will be unbound if a handle is cached and the bindings are invalid.
//
internal CMDWrapper GetStatementHandle()
{
// update the command wrapper object, allocate buffer
// create reader object
//
if (_cmdWrapper == null)
{
_cmdWrapper = new CMDWrapper(_connection);
Debug.Assert(null != _connection, "GetStatementHandle without connection?");
_connection.AddWeakReference(this, OdbcReferenceCollection.CommandTag);
}
if (_cmdWrapper._dataReaderBuf == null)
{
_cmdWrapper._dataReaderBuf = new CNativeBuffer(4096);
}
// if there is already a statement handle we need to do some cleanup
//
if (null == _cmdWrapper.StatementHandle)
{
_isPrepared = false;
_cmdWrapper.CreateStatementHandle();
}
else if ((null != _parameterCollection) && _parameterCollection.RebindCollection)
{
_cmdWrapper.FreeStatementHandle(ODBC32.STMT.RESET_PARAMS);
}
return(_cmdWrapper);
}