Re: [HACKERS] pgbench - allow to store select results into variables

Alvaro Herrera <alvherre@2ndquadrant.com> writes:
> On 2019-Jan-10, Tom Lane wrote:
>> This \cset thing seem like an incredibly badly thought out kluge.
>> What is its excuse to live?

> The reason is that you can set variables from several queries in one
> network trip.

So who needs that?  Just merge the queries, if it's so important that
you avoid multiple round trips.

> We can take it out I guess, but my impression was that we already pretty
> much had a consensus that it was wanted. 

Maybe if the implementation weren't a pile of junk it'd be all right,
but as-is this is a mess.  The dependency on counting \; in particular
is setting me off, because that has little if anything to do with the
number of query results to be expected.  I imagine the argument will
be that nobody would write the sort of queries that break that assumption
in a pgbench script; but I don't find that kind of design to be up
to project standards, especially not when the argument for the feature
is tissue-thin in the first place.

            regards, tom lane