Re: PQputCopyEnd doesn't adhere to its API contract

On Thu, Sep 4, 2014 at 12:53 PM, Bruce Momjian <bruce@momjian.us> wrote:
> On Thu, Sep  4, 2014 at 12:52:14PM -0400, Robert Haas wrote:
>> On Wed, Sep 3, 2014 at 6:24 PM, Bruce Momjian <bruce@momjian.us> wrote:
>> > On Fri, May  9, 2014 at 12:03:36PM -0400, Robert Haas wrote:
>> >> On Thu, May 8, 2014 at 5:21 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> >> > Perhaps the text should be like this:
>> >> >
>> >> > The result is 1 if the termination message was sent; or in nonblocking
>> >> > mode, this may only indicate that the termination message was successfully
>> >> > queued.  (In nonblocking mode, to be certain that the data has been sent,
>> >> > you should next wait for write-ready and call <function>PQflush</>,
>> >> > repeating until it returns zero.)  Zero indicates that the function could
>> >> > not queue the termination message because of full buffers; this will only
>> >> > happen in nonblocking mode.  (In this case, wait for write-ready and try
>> >> > the PQputCopyEnd call again.)  If a hard error occurs, -1 is returned; you
>> >> > can use <function>PQerrorMessage</function> to retrieve details.
>> >>
>> >> That looks pretty good.   However, I'm realizing this isn't the only
>> >> place where we probably need to clarify the language.  Just to take
>> >> one example near at hand, PQputCopyData may also return 1 when it's
>> >> only queued the data; it seems to try even less hard than PQputCopyEnd
>> >> to ensure that the data is actually sent.
>> >
>> > Uh, where are we on this?
>>
>> I think someone needs to take Tom's proposed language and make it into
>> a patch.  And figure out which other functions in the documentation
>> need similar updates.
>
> OK, did David G Johnston email comments from today help here?

I didn't look at them in detail, but they don't seem to match the
style of our documentation generally.

-- 
Robert Haas
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