[libzdb-general] Feature Request: Exception_frame.err

Hi there,

In some situations it would come in handy if there was also a numeric error code from the DB layer.

What I mean is an additional property of Exception_frame like .err, .errno or alike, which receives the numeric error code from the driver API in case of an exception.

For example a in my code I'm using:

// If there are many asynchronous inserts, we might hit a deadlock if (retries < 2 && strncmp(Exception_frame.message, "Deadlock found when trying to get lock; try restarting transaction", 67) == 0) { retries++; _usleep(100000); goto redo; }

This is kind of ugly...

It would be better to do something like

if (retries < 2 && Exception_frame.errno == ER_LOCK_DEADLOCK) { ... }

Cheers, Till