Re: Function return number of affected rows

On Thu, Feb 10, 2005 at 02:51:46PM -0200, Francisco Figueiredo Jr. wrote:
> Michael Fuhr wrote:
> >Does Npgsql use its own implemention of the PostgreSQL protocol?
> >If so, then that implementation will have to provide the desired
> >functionality itself.
>
> Yeap. Npgsql implements protocol itself. This is exactly the problem.
> I'm not receiving the CompletedResponse protocol message when executing
> the insert inside a function. It is through the CompletedResponse
> postgresql server says how many rows were affected. But it seems that
> when calling a function it doesn't return any.

I haven't used Npgsql, but the documentation has an example with
the following code:

NpgsqlCommand command = new NpgsqlCommand("insert into table1 values(1, 1)", conn);
Int32 rowsaffected;

try
{
rowsaffected = command.ExecuteNonQuery();
}

Is that what you're trying to do? Does it not work?

I downloaded the latest Npgsql source and found the following in
ExecuteNonQuery():

// The number of rows affected is in the third token for insert queries
// and in the second token for update and delete queries.
// In other words, it is the last token in the 0-based array.

return Int32.Parse(ret_string_tokens[ret_string_tokens.Length - 1]);

It looks like ExecuteNonQuery() is at least attempting to return
the number of rows affected.

Have I misunderstood what you're doing?

--
Michael Fuhr
http://www.fuhr.org/~mfuhr/