Re: extend pgbench expressions with functions

On Mon, Jan 18, 2016 at 10:07 AM, Michael Paquier
<michael(dot)paquier(at)gmail(dot)com> wrote:
> On Sun, Jan 17, 2016 at 3:10 AM, Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr> wrote:
>> I put the function evaluation in a function in the attached version.
>
> Thanks, this makes the code a bit clearer.

OK, so I had an extra look at this patch and I am marking it as ready
for committer. A couple of things to be aware of, and the result of
this thread with the patch in its current state:
- The patch is keeping \setrandom. Fabien and I are agreeing to purely
remove it, though it is kept in the patch because it is easier to
remove existing code rather than add it again per Fabien's concerns.
- INT64_MIN / -1 throws a core dump, and errors on HEAD. I think this
should be fixed, Fabien does not.
- There are not many overflow checks for the exiting int64 operators
and functions. HEAD doesn't do much, this patch makes it the situation
a bit worse even if there are a couple of checks for int() for
example. We do not do any checks for sqrt(-N) (N > 0) for example.
- It may be more interesting to have the function execution code into
a separate file for clarity. Not mandatory though.
Except those comments, all the other issues have been addressed. I
think this is a great patch, and greatly improves the extensibility of
pgbench.
--
Michael