The Hermit Hacker <scrappy@hub.org> writes:
> select count(1) from webhit_details_formatted where counter_id = 1;
> [ hangs, then crashes when try to cancel ]
Wow, how'd that escape notice for this long?
play=> create table webhit_details_formatted (counter_id int);
CREATE
play=> select count(1) from webhit_details_formatted where counter_id = 1;
pqReadData() -- backend closed the channel unexpectedly.
Mine just crashes immediately, no waiting.
The good news is that current sources don't seem to have the problem.
> Under Oracle, doing the "SELECT count(1)..." is faster then doing "SELECT
> count(*)..." (supposedly), since it doesn't have to retrieve all the
> information, only count how many records match the WHERE clause ...
Under Postgres, there's no difference --- in fact, the parser currently
converts count(*) into count(1) ;-)
regards, tom lane