On Wednesday 03 December 2003 13:59, Mark Kirkwood wrote:
> How about:
>
> Implement a function "estimated_count" that can be used instead of
> "count". It could use something like the algorithm in
> src/backend/commands/analyze.c to get a reasonably accurate psuedo count
> quickly.
>
> The advantage of this approach is that "count" still means (exact)count
> (for your xact snapshot anyway). Then the situation becomes:
>
> Want a fast count? - use estimated_count(*)
> Want an exact count - use count(*)
Something like select reltuples from pg_class where relname='foo'?
Shridhar