Re: PATCH: Batch/pipelining support for libpq

On Mon, Mar 27, 2017 at 4:42 PM, Craig Ringer <craig(at)2ndquadrant(dot)com> wrote:
> On 27 March 2017 at 15:26, Michael Paquier <michael(dot)paquier(at)gmail(dot)com> wrote:
>> On Sat, Mar 25, 2017 at 9:50 PM, Craig Ringer <craig(at)2ndquadrant(dot)com> wrote:
>>> I'm fairly confident that I overlooked single row mode entirely in the
>>> original patch, though it's long enough ago that it's hard for me to
>>> remember exactly.
>>>
>>> I don't really have much of an opinion on the best handling of it.
>>>
>>> I would expect to be setting single-row mode just before I requested
>>> the *result* from the next pending query, since it relates to result
>>> processing rather than query dispatch. But that's about all the
>>> opinion I have here.
>>
>> Yeah, I think that it makes sense to allow users to switch to single
>> row mode before requesting a result in the queue. It seems to me that
>> this should also be effective only during the fetching of one single
>> result set. When the client moves on to the next item in the queue we
>> should make necessary again a call to PQsetSingleRowMode().
>>
>> Regarding the patch, I have spotted the following things in the last version:
>> - src/test/modules/Makefile should include test_libpq.
>> - Regression tests from 0002 are failing:
>> ok 1 - testlibpqbatch disallowed_in_batch
>> ok 2 - testlibpqbatch simple_batch
>> ok 3 - testlibpqbatch multi_batch
>> ok 4 - testlibpqbatch batch_abort
>> ok 5 - testlibpqbatch timings
>> not ok 6 - testlibpqbatch copyfailure
>
> There are only a few more days left of this commit fest.
>
> Things are sounding pretty ready here, with some final cleanups
> pending. It'd be cool to get this into Pg 10 :)

Yes, that's one of the items I'd like to help with by the end of the CF.
--
Michael