Paul,
Le 27/08/2024 à 20:11, Paul Jungwirth a écrit :
The issue is the order-of-operations used by the planner. If I put
EXPLAIN on your last query, I see:
Hash Join (cost=16.64..109.90 rows=2410 width=64)
Hash Cond: (tmp_limitcontrats.idcontrat = paliers.idcontrat)
-> Seq Scan on tmp_limitcontrats (cost=0.00..35.50 rows=2550
width=4)
-> Hash (cost=14.27..14.27 rows=189 width=12)
-> Seq Scan on paliers (cost=0.00..14.27 rows=189 width=12)
Filter: (numrange(((qtep1 + 1))::numeric,
(qtep2)::numeric) <> '(,)'::numrange)
So we are applying that filter to every row in paliers, not just the
one with idcontrat = 1003.
I understand, makes perfect sense. Thanks for the explanation. Have a
nice day,
