protected override async Task HandleMessage(PgTransaction transaction, MessageBuilder messageBuilder, PipeWriter writer, CancellationToken token)
{
if (transaction.State == TransactionState.Idle)
{
throw new PgErrorException(PgErrorCodes.NoActiveSqlTransaction,
"Describe message was received when no transaction is taking place.");
}
if (!string.IsNullOrEmpty(ObjectName))
{
throw new PgErrorException(PgErrorCodes.FeatureNotSupported,
"Describe: Named statements/portals are not supported.");
}
var(schema, parameterDataTypes) = await transaction.Describe();
if (PgObjectType == PgObjectType.PreparedStatement)
{
await writer.WriteAsync(messageBuilder.ParameterDescription(parameterDataTypes), token);
}
var response = schema.Count == 0 ? messageBuilder.NoData() : messageBuilder.RowDescription(schema);
await writer.WriteAsync(response, token);
}
