Обсуждение: Getting total records in result set

What is the easiest (and least system intensive) method of getting the
total number of records in the result set?  I am presently opening the
cursor, doing a FETCH ALL, reading PQntuples(), closing the cursor, and
reopening it for the 'real' work.

Background:  I am writing a CGI script that paginates the output from an
SQL query and need to know a total number of records to calculate the
number of pages to display.

Is what I am going correct or is there a better way?

Thanks,

Mike.

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  Mike Frisch                         Email: mfrisch@saturn.tlug.org
  Northstar Technologies        WWW: http://saturn.tlug.org/~mfrisch
  Newmarket, Ontario, CANADA
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On Sat, 10 Apr 1999, Mike Frisch wrote:

> What is the easiest (and least system intensive) method of getting the
> total number of records in the result set?  I am presently opening the
> cursor, doing a FETCH ALL, reading PQntuples(), closing the cursor, and
> reopening it for the 'real' work.
>
> Background:  I am writing a CGI script that paginates the output from an
> SQL query and need to know a total number of records to calculate the
> number of pages to display.
>
> Is what I am going correct or is there a better way?

If you create a view with SQL, then do 'select count(*) from <viewname>',
you can just read the first (and only) row from THAT query.  Can you then
create your cursor from the view?

Brett W. McCoy
                                        http://www.lan2wan.com/~bmccoy/
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