Please help with this explain analyse...

Hi all,

I don't understand why this request take so long. Maybe I read the
analyse correctly but It seem that the first line(Nested Loop Left Join
...) take all the time. But I don't understand where the performance
problem is ??? All the time is passed in the first line ...

Thanks for your help!

/David

explain analyse SELECT *

FROM CR INNER JOIN CS ON CR.CRNUM = CS.CSCRNUM AND
CR.CRYPNUM = CS.CSYPNUM
INNER JOIN GL ON CS.CSGLNUM = GL.GLNUM AND
GL.GLSOCTRL = 1
INNER JOIN RR ON CR.CRRRNUM = RR.RRNUM
LEFT OUTER JOIN YR ON YR.YRYOTYPE = 'Client' AND
YR.YRYONUM = 'Comptabilite.Recevable.Regroupement' AND YR.YRREF = RR.RRNUM
WHERE CRYPNUM = 'M'
AND CRDATE + INTERVAL '0 days' <= '2005-01-28'

"Nested Loop Left Join (cost=0.00..42.12 rows=1 width=8143) (actual
time=15.254..200198.524 rows=8335 loops=1)"
" Join Filter: (("inner".yrref)::text = ("outer".rrnum)::text)"
" -> Nested Loop (cost=0.00..36.12 rows=1 width=7217) (actual
time=0.441..2719.821 rows=8335 loops=1)"
" -> Nested Loop (cost=0.00..30.12 rows=1 width=1580) (actual
time=0.242..1837.413 rows=8335 loops=1)"
" -> Nested Loop (cost=0.00..18.07 rows=2 width=752)
(actual time=0.145..548.607 rows=13587 loops=1)"
" -> Seq Scan on gl (cost=0.00..5.21 rows=1
width=608) (actual time=0.036..0.617 rows=1 loops=1)"
" Filter: (glsoctrl = 1)"
" -> Index Scan using cs_pk on cs (cost=0.00..12.83
rows=2 width=144) (actual time=0.087..444.999 rows=13587 loops=1)"
" Index Cond: (('M'::text = (cs.csypnum)::text)
AND ((cs.csglnum)::text = ("outer".glnum)::text))"
" -> Index Scan using cr_pk on cr (cost=0.00..6.02 rows=1
width=828) (actual time=0.073..0.077 rows=1 loops=13587)"
" Index Cond: (((cr.crypnum)::text = 'M'::text) AND
(cr.crnum = "outer".cscrnum))"
" Filter: ((crdate + '00:00:00'::interval) <=
'2005-01-28 00:00:00'::timestamp without time zone)"
" -> Index Scan using rr_pk on rr (cost=0.00..5.99 rows=1
width=5637) (actual time=0.062..0.069 rows=1 loops=8335)"
" Index Cond: (("outer".crrrnum)::text = (rr.rrnum)::text)"
" -> Index Scan using yr_idx1 on yr (cost=0.00..5.99 rows=1
width=926) (actual time=0.127..17.379 rows=1154 loops=8335)"
" Index Cond: (((yryotype)::text = 'Client'::text) AND
((yryonum)::text = 'Comptabilite.Recevable.Regroupement'::text))"
"Total runtime: 200235.732 ms"