On 2021-Feb-03, tsunakawa.takay@fujitsu.com wrote:
> From: 'Alvaro Herrera' <alvherre@alvh.no-ip.org>
> > > + conn->fe_msg->num_fields != DEF_FE_MSGFIELDS)
>
> > The rationale for that second condition is this: if the memory allocated
> > is the initial size, we don't free memory, because it would just be
> > allocated of the same size next time, and that size is not very big, so
> > it's not a big deal if we just let it be, so that it is reused if we
> > call PQtrace() again later. However, if the allocated size is larger
> > than default, then it is possible that some previous tracing run has
> > enlarged the trace struct to a very large amount of memory, and we don't
> > want to leave that in place.
>
> Ah, understood. In that case, num_fields should be max_fields.
Oh, of course.
--
Álvaro Herrera 39°49'30"S 73°17'W
"Just treat us the way you want to be treated + some extra allowance
for ignorance." (Michael Brusser)
