Is this by any chance MS Vcc :-) Maybe there's an error in the STL library.
2/26/2003 2:56:27 PM, Carlos Moreno <moreno@mochima.com> wrote:
>
>After following your advice and tap on the communications
>between frontend and backend (I must say it was a bit
>intimidating, but I did have a lot of fun), things are
>very weird.
>
>My current working theory is that all the commands are
>being executed properly, despite a mysterious random
>data exchange that produces the error I'm seeing.
>
>What I observed is the following: message from FE
>to BE, data: Qinsert into table ......
>
>Then a reply Pblank.CINSERT.304712345
>
>(I guess the number is the OID of the record inserted).
>
>After that, another message from FE to BE, with an X
>(which is "close connection", if I understand correctly).
>
>But then, *after* sending that one, the client sends
>another block, starting with an e, or a p. Bang!!
>That's my error.
>
>Of course, in my code, I simply do:
>
>if (db.Exec (sql_string) != PGRES_COMMAND_OK)
>{
> cerr << "Error at ... currentdate ...."
> << db.ErrorMessage() << endl;
>}
>
>So, apparently Exec is internally doing more than it
>should, and by the time it comes back to the calling
>function, it carries the error message corresponding to
>the spurious block, after having succesfully executed
>the statement).
>
>Sounds familiar to anyone out there? Any sane reason
>why this could be happening??
>
>This sounds like the typical symptoms of a case of
>undefined behaviour -- some lost pointers and the
>like... Except that I practically use no pointers at
>all (all of them are encapsulated anyway... I use
>*strictly* string class, vector, list, and map -- there
>is not *a single* use of any pointer in the classical
>sense of using pointers -- i.e., pointer manipulation
>of data structures, raw allocation, pointer arithmetic,
>etc.). Can you think of other explanations?
>
>Thanks!
>
>Carlos
>--
>
>
>
>
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