On 2020-Nov-14, Daniel Verite wrote:
> The patch I posted in [1] was pretty simple, but at the time, query
> results were always discarded. Now that pgbench can instantiate
> variables from query results, a script can do:
> select 1 as var \gset
> select :var;
> This kind of sequence wouldn't work in batch mode since it
> sends queries before getting results of previous queries.
>
> So maybe \gset should be rejected when inside a batch section.
Hah.
Hacking pgbench extensively is beyond what I'm willing to do for this
feature at this time. Making \gset rejected in a batch section sounds
simple enough and supports \beginbatch et al sufficiently to compare
performance, so I'm OK with a patch that does that. That'd be a small
extension to your previous patch, if I understand correctly.
If you or others want to send patches to extend batch support with
read-write tracking for variables, feel free, but I hereby declare that
I'm not taking immediate responsibility for getting them committed.
