Обсуждение: libpgtcl/pg_execute undocumented feature ?

I was just trying to implement a -numAffected option to pg_result to
get the number of affected tuples when invoking INSERT/UPDATE/DELETE
when I saw, that there is already a command that does give me the
number of affected tuples. Will pg_execute be dropped in uncoming
releases ?

Gerhard Hintermayer

On 4 Oct 2002, (Gerhard Hintermayer) wrote:

> I was just trying to implement a -numAffected option to pg_result to
> get the number of affected tuples when invoking INSERT/UPDATE/DELETE
> when I saw, that there is already a command that does give me the
> number of affected tuples. Will pg_execute be dropped in uncoming
> releases ?

I don't see why it would be dropped.

BTW, I've just noticed you say it's undocumented. I see it listed in
chapter 3 of the Client Interfaces, that's the 'pgtcl - Tcl Binding Library'
chapter for the 7.3 docmentation but not in my copy of the 7.2.1
documentation. So it's been documented now.

However, taking the view that there is a split between application developer
and database developer: the design of a DB can change without the application
developer knowing anything other than suddenly an INSERT command, for exmaple,
says zero tuples were affected. This generally results from the use of RULES
and may not be a problem at all and may be even less of one in 7.4. However, I
would tend to avoid building such reliance on the tuple count into an
application and unless you really do need the count I would suggest it's best
to avoid the question entirely.


-- 
Nigel J. Andrews
Director

---
Logictree Systems Limited
Computer Consultants

Nigel J. Andrews wrote:
> On 4 Oct 2002, (Gerhard Hintermayer) wrote:
> 
> > I was just trying to implement a -numAffected option to pg_result to
> > get the number of affected tuples when invoking INSERT/UPDATE/DELETE
> > when I saw, that there is already a command that does give me the
> > number of affected tuples. Will pg_execute be dropped in uncoming
> > releases ?
> 
> I don't see why it would be dropped.
> 
> BTW, I've just noticed you say it's undocumented. I see it listed in
> chapter 3 of the Client Interfaces, that's the 'pgtcl - Tcl Binding Library'
> chapter for the 7.3 docmentation but not in my copy of the 7.2.1
> documentation. So it's been documented now.

Yes, someone already pointed out that doc item was missing so we added
it to 7.3.

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