ecpg problem
I just found this one on my TODO list:
The error message for "no data" in an exec sql insert select from statement
has to be 100.
It seems I cannot get that kind of information from libpq other than
checking for the result being 0 tuples. But is this correct? Or are there
possibilities to get 0 tuples? That is I get PQcmdTuples(results) = 0 with
the return code being PGRES_COMMAND_OK.
Also I wonder if PGRES_COMMAND_OK could come from other statements for which
setting the not found marker makes no sense. I think it does make sense for
insert, delete and update.
On the other hand returning NOT_FOUND on other commands doesn't do hany harm
though since the whenever not found isn't checked for other commands.
Michael
--
Dr. Michael Meskes meskes@online-club.de, meskes@debian.org
Go SF49ers! Go Rhein Fire! Use Debian GNU/Linux!
On Fri, 14 Aug 1998, Dr. Michael Meskes wrote:
I just found this one on my TODO list:
The error message for "no data" in an exec sql insert select from statement
has to be 100.It seems I cannot get that kind of information from libpq other than
checking for the result being 0 tuples. But is this correct? Or are there
possibilities to get 0 tuples? That is I get PQcmdTuples(results) = 0 with
the return code being PGRES_COMMAND_OK.
Shouldn't you check for PGRES_TUPLES_OK ? I always check for this if I
want to know if a data select statement has succeeded. And this also
still allows PQntuples() == 0
Maarten
_____________________________________________________________________________
| TU Delft, The Netherlands, Faculty of Information Technology and Systems |
| Department of Electrical Engineering |
| Computer Architecture and Digital Technique section |
| M.Boekhold@et.tudelft.nl |
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On Sat, Aug 15, 1998 at 12:27:55PM +0200, Maarten Boekhold wrote:
It seems I cannot get that kind of information from libpq other than
checking for the result being 0 tuples. But is this correct? Or are there
possibilities to get 0 tuples? That is I get PQcmdTuples(results) = 0 with
the return code being PGRES_COMMAND_OK.Shouldn't you check for PGRES_TUPLES_OK ? I always check for this if I
No, the insert command doesn't return any tuples anyway. But then I don't
check for it either. libecpg has to work with every return value and so
checks them all. It just happens that the insert commend returns
PGRES_COMMAND_OK. :-)
Michael
--
Dr. Michael Meskes meskes@online-club.de, meskes@debian.org
Go SF49ers! Go Rhein Fire! Use Debian GNU/Linux!