Re: What is the best way to optimize this query

On 1 July 2010 06:19, Srikanth Kata <srikanth(at)inventum(dot)net> wrote:
>
> Please tell me What is the best way to optimize this query
>
> select
> s.*,a.actid,a.phone,d.domid,d.domname,d.domno,a.actno,a.actname,p.descr
> as svcdescr from vwsubsmin s inner join packages p on s.svcno=p.pkgno inner
> join
> account a on a.actno=s.actno inner join ssgdom d on a.domno=d.domno inner
> join (select subsno from
> getexpiringsubs($1,cast($2 as integer),cast($3 as double precision), $4) as
> (subsno int,expirydt timestamp without time zone,balcpt double precision))
> as e on s.subsno=e.subsno where s.status <=15 and d.domno=$5 order by
> d.domname,s.expirydt,a.actname
> --
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> Sent from the PostgreSQL - performance mailing list archive at Nabble.com.
>

Might help if the query were a bit more readable too:

select
s.*,
a.actid,
a.phone,
d.domid,
d.domname,
d.domno,
a.actno,
a.actname,
p.descr as svcdescr
from
vwsubsmin s
inner join
packages p
on s.svcno=p.pkgno inner
join
account a
on a.actno=s.actno
inner join
ssgdom d on a.domno=d.domno
inner join
(select
subsno
from
getexpiringsubs(
$1,
cast($2 as integer),
cast($3 as double precision),
$4
) as
(subsno int,
expirydt timestamp without time zone,
balcpt double precision)
) as e
on s.subsno=e.subsno
where
s.status <=15
and
d.domno=$5
order by
d.domname,
s.expirydt,
a.actname;

And it would also help if the table names, column names and aliases
were more self-documenting.

As Rajesh said, an EXPLAIN ANALYZE output is needed, as we don't yet
know where your indexes are.

Regards

Thom