Hi all.
This is not very "hackers"-related, but related to the topic of window-funcitons, which seems to be discussed quite a
biton "hackers" these days.
Can window-functions in PG be used to return "total number of rows" in a "paged result"?
Say you have:
SELECT p.id, p.firstname FROM person pORDER BY p.firstname ASCLIMIT 10 OFFSET 10
Is it possible to use some window-function to return the "total-number of columns" in a separate column?
In Oracle one can do
SELECT q.*, max(rownum) over() as total_rows FROM (subquery)
which returns the total number or columns in a separate column. This is very handy for web-pages which for example need
todisplay the rist 20 results of several million, without having to do a separate count(*) query.
--
Andreas Joseph Krogh <andreak@officenet.no>
Senior Software Developer / CEO
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