Re: Suggesting a libpq addition

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От Dmitriy Igrishin
Тема Re: Suggesting a libpq addition
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Msg-id AANLkTimQX5VLqQS8phnds_iEEd1EhH40Byyof9t8W+BW@mail.gmail.com
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Ответ на Re: Suggesting a libpq addition  (Magnus Hagander <magnus@hagander.net>)
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Hey hackers,

Varargs-exec is useful only when programmer calls it directly.
It is useless when libpq is used to create a more flexible high-level
library (e.g., for C++). PQexecParams (PQexecPrepared) are good
for it.

What about auto reconnect. There are PQreset already and
PG_CONNECTION_OK (_BAD) to manipulate the strategy of
reconnection. If connection became BAD how many times
suggested function will try to reconnect ?
IMO, auto-reconnection is a magic...

2010/12/5 Magnus Hagander <magnus@hagander.net>
On Sun, Dec 5, 2010 at 11:57, Heikki Linnakangas
<heikki.linnakangas@enterprisedb.com> wrote:
> On 05.12.2010 12:10, Magnus Hagander wrote:
>>
>> On Sun, Dec 5, 2010 at 10:22, Marc Balmer<marc@msys.ch>  wrote:
>>>
>>> I am suggesting adding a function to libpq:
>>>
>>> PGresult *PQvexec(PGconn *conn, const char *fmt, ...);
>>>
>>> It behaves similar to PQexec, but it allows for printf style varargs and
>>
>> How is that not a horrible idea, compared to using PQexecParams()? You
>> have to remember to do all your escaping and things manually, whereas
>> PQexecParams() does it automatically.
>
> A varargs version of PQexecParams() would be handy, though. Imagine being
> able to do:
>
> PQexecVParams("SELECT * FROM mytable WHERE foo = $1 AND bar = $2", foovar,
> barvar);
>
> instead of constructing an array for the variables.

I agree, that sounds a lot more useful. And if definitely needs to be
split off from the auto-reconnection stuff.


--
 Magnus Hagander
 Me: http://www.hagander.net/
 Work: http://www.redpill-linpro.com/

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// Dmitriy.


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