Teodor Sigaev <[EMAIL PROTECTED]> writes: > Tom, I am afraid that I don't understand. My first example: > wow=# explain analyze select max(click.accesses) from click; > QUERY PLAN > ----------------------------------------------------------------------------------------------------------------- > Aggregate (cost=1103.70..1103.70 rows=1 width=8) (actual > time=289.391..289.393 rows=1 loops=1) > -> Seq Scan on click (cost=0.00..971.36 rows=52936 width=8) (actual > time=0.013..133.943 rows=52936 loops=1) > Total runtime: 289.498 ms > (3 rows)
> Time: 290,695 ms > select max() returns only one row... If you mean rows in Seq Scan than > gettimeofday was called (52936+1)*2. Huge value :( Right, that many times at the Seq Scan plan node, and (1+1)*2 more times at the Aggregate node. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]