Hi, Thomas.
I believe it is because of your WHERE clause, which is filtering out the nulls
from hp table.
According to
WHERE
hp.poste_idposte = 275
You only want registers that have hp.poste_idposte = 275, not the null ones.
HTH
Best,
Oliveiros
----- Original Message -----
From: Thomas BOURIMECH
To: 'pgsql-sql@postgresql.org'
Sent: Wednesday, April 21, 2010 1:29 PM
Subject: [SQL] LEFT OUTER JOIN issue
Hi everyone, here is my problem :
I got two tables :
CREATE TABLE "public"."calendar_temp" (
"id" SERIAL,
"dat" DATE,
"heur" TIME WITHOUT TIME ZONE,
CONSTRAINT "calendar_temp_pkey" PRIMARY KEY("id")
) WITHOUT OIDS;
CREATE TABLE "public"."h_part" (
"idh" SERIAL,
"poste_idposte" INTEGER NOT NULL,
"t" NUMERIC(4,1),
"heuremesure" TIME WITHOUT TIME ZONE,
"datmesure" DATE,
CONSTRAINT "h_part_datmesure_key" UNIQUE("datmesure", "heuremesure",
"poste_idposte"),
CONSTRAINT "h_part_pkey" PRIMARY KEY("idh"),
CONSTRAINT "h_part_fk" FOREIGN KEY ("poste_idposte")
REFERENCES "public"."poste"("idposte")
ON DELETE NO ACTION
ON UPDATE NO ACTION
NOT DEFERRABLE
) WITHOUT OIDS;
Data in table are like this :
calendar_temp
-----------------
id dat heur
1 15/03/2008 0:00
2 15/03/2008 3:00
3 15/03/2008 6:00
4 15/03/2008 9:00
5 15/03/2008 12:00
6 15/03/2008 15:00
h_part
-----------------
idh poste_idposte t heuremesure datmesure
5001 275 8,3 0:00
15/03/2008
5002 275 12 3:00
15/03/2008
5003 275 15 6:00
15/03/2008
5004 275 18 9:00
15/03/2008
I expect the following data set as a result from the following request :
SELECT ct.dat,ct.heur,hp.datmesure,hp.heuremesure,hp.t FROM calendar_temp as
ct
LEFT OUTER JOIN h_part as hp
ON ct.dat = hp.datmesure
AND ct.heur = hp.heuremesure
WHERE
hp.poste_idposte = 275
ORDER BY ct.dat, ct.heur
dat heur datmesure heuremesure t
-----------------------------------------------------------
15/03/2008 0:00 15/03/2008 0:00
8,3
15/03/2008 3:00 15/03/2008 3:00 12
15/03/2008 6:00 15/03/2008 6:00 15
15/03/2008 9:00 15/03/2008 9:00 18
15/03/2008 12:00 null null
null
15/03/2008 15:00 null null
null
But unfortunatly all that I get is this set :
dat heur datmesure heuremesure t
-----------------------------------------------------------
15/03/2008 0:00 15/03/2008 0:00
8,3
15/03/2008 3:00 15/03/2008 3:00 12
15/03/2008 6:00 15/03/2008 6:00 15
15/03/2008 9:00 15/03/2008 9:00 18
Getting mad with it...
Thanks for any help...
