> IMN1=# explain select ref_num from grls where ag_id = (select 24);
> Index Scan using grls_ag_id on grls (cost=0.00..597.87 rows=849 width=12)
> InitPlan
> -> Result (cost=0.00..0.00 rows=0 width=0)
>
> ". . . in (24) " work in 35 faster than ". . . in (select 24)". In the
> last don't use indices for increase perfomans.
> It's been normaly work in PostgreSQL version 7.2 ? Or not?
http://www.ca.postgresql.org/docs/faq-english.html#4.23
Greg
