Re: [GENERAL] Getting total records in result set
| От | Brett W. McCoy |
|---|---|
| Тема | Re: [GENERAL] Getting total records in result set |
| Дата | |
| Msg-id | Pine.LNX.4.04.9904101243210.1354-100000@dragosani.lan2wan.com обсуждение исходный текст |
| Ответ на | Getting total records in result set (Mike Frisch <mfrisch@saturn.tlug.org>) |
| Список | pgsql-general |
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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