Richard Huxton, 17.03.2009 13:26:
Enrico Pirozzi wrote:
and i would like to retrieve the number of records without make
select count(*) from table
I could use directly the table instead of select, and in this this
case I'm searching for
something like the reltuples field in the pg_class table, but I need
this value in real time.
If you want an accurate, up-to-date count then you'll need to use
count(*) or have a trigger keep a summary-count for you. A simple
implementation will reduce concurrency to writes on that table however.
Lots of discussion in the mailing-list archives on this.
Can a trigger solution really give an accurate count in a concurrent
insert/delete scenario?
Thomas
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