[HACKERS] Alternative to LIMIT in SELECT ?

I can't speak to the relative efficiencies of the methods, but I do
perform queries that present data subsets to web browsers using postgresql
with the following method:

1) collect data input; do cgi query; write tuples to temporary file
2) html page index sent back to browser contains page specific
references to temporary file name and tuple range.
3) Subsequent data retrievals reference temporary file using sed and
tuple range
4) temporary file is destroyed 15min after last access time by a
background process.
This consumes disk space, but I assume it conserves memory compared to
a cursor/fetch sequence performed in a persistent db connection.

For a general purpose query, I'm not sure if there is any other
alternative to this method unless you wish to reperform the query
for each retrieved html page.

Marc Zuckman
marc(at)fallon(dot)classyad(dot)com

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