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* Passing input to a view?
@ 2007-05-10 06:03 Paul Lambert <paul.lambert@autoledgers.com.au>
2007-05-10 06:14 ` Re: Passing input to a view? A. Kretschmer <andreas.kretschmer@schollglas.com>
2007-05-10 06:14 ` Re: Passing input to a view? Phillip Smith <phillip.smith@weatherbeeta.com.au>
0 siblings, 2 replies; 3+ messages in thread
From: Paul Lambert @ 2007-05-10 06:03 UTC (permalink / raw)
To: pgsql-sql
Is it possible to define a view to use input parameters rather than a
hard-wired value in a where clause?
I.e. I have the following view:
CREATE OR REPLACE VIEW invoiced_repairs AS
SELECT ro_header.ro_number, ro_header.received_date, vehicles.vehicle_id,
vehicles.model, vehicles.engine, vehicles.transmission,
ro_header.odometer_reading,
ro_header.service_description,
(
CASE WHEN (vehicles.month_of_manufacture <> '' AND
vehicles.year_of_manufacture <> '')
THEN
(vehicles.month_of_manufacture || '/' || vehicles.year_of_manufacture)
ELSE
''
END
) AS date_of_manufacture,
vehicles.identification_number, vehicles.engine_number from ro_header
INNER JOIN vehicles USING (vehicle_address)
WHERE ro_header.received_date between '1-jan-2007' AND '10-May-2007';
ALTER TABLE invoiced_repairs OWNER TO postgres;
Instead of having it set to 1-Jan-2007 and 10-May-2007 for the dates,
can I specify that those values should be passed to the view? Or would I
need to change this to an SQL language function?
I can't find anything in the documentation that answers this, but maybe
I'm not looking hard enough.
Thanks in advance.
--
Paul Lambert
Database Administrator
AutoLedgers
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: Passing input to a view?
2007-05-10 06:03 Passing input to a view? Paul Lambert <paul.lambert@autoledgers.com.au>
@ 2007-05-10 06:14 ` A. Kretschmer <andreas.kretschmer@schollglas.com>
1 sibling, 0 replies; 3+ messages in thread
From: A. Kretschmer @ 2007-05-10 06:14 UTC (permalink / raw)
To: pgsql-sql
am Thu, dem 10.05.2007, um 14:03:53 +0800 mailte Paul Lambert folgendes:
> Is it possible to define a view to use input parameters rather than a
> hard-wired value in a where clause?
As far as i know, no.
> Instead of having it set to 1-Jan-2007 and 10-May-2007 for the dates,
> can I specify that those values should be passed to the view? Or would I
> need to change this to an SQL language function?
>
> I can't find anything in the documentation that answers this, but maybe
> I'm not looking hard enough.
You can write a so called 'set returning function' instead.
Read more:
http://www.postgresql.org/docs/current/static/xfunc-sql.html#XFUNC-SQL-TABLE-FUNCTIONS
Andreas
--
Andreas Kretschmer
Kontakt: Heynitz: 035242/47150, D1: 0160/7141639 (mehr: -> Header)
GnuPG-ID: 0x3FFF606C, privat 0x7F4584DA http://wwwkeys.de.pgp.net
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: Passing input to a view?
2007-05-10 06:03 Passing input to a view? Paul Lambert <paul.lambert@autoledgers.com.au>
@ 2007-05-10 06:14 ` Phillip Smith <phillip.smith@weatherbeeta.com.au>
1 sibling, 0 replies; 3+ messages in thread
From: Phillip Smith @ 2007-05-10 06:14 UTC (permalink / raw)
To: pgsql-sql
Remove the WHERE clause that specifies the date so the view includes all
dates, then apply the WHERE clause when selecting the view.
SELECT *
FROM invoiced_repairs
WHERE invoiced_repairs.received_date BETWEEN '1 Jan 2007' AND '10
May 2007';
-----Original Message-----
From: pgsql-sql-owner@postgresql.org [mailto:pgsql-sql-owner@postgresql.org]
On Behalf Of Paul Lambert
Sent: Thursday, 10 May 2007 16:04
To: pgsql-sql@postgresql.org
Subject: [SQL] Passing input to a view?
Is it possible to define a view to use input parameters rather than a
hard-wired value in a where clause?
I.e. I have the following view:
CREATE OR REPLACE VIEW invoiced_repairs AS
SELECT ro_header.ro_number, ro_header.received_date, vehicles.vehicle_id,
vehicles.model, vehicles.engine, vehicles.transmission,
ro_header.odometer_reading,
ro_header.service_description,
(
CASE WHEN (vehicles.month_of_manufacture <> '' AND
vehicles.year_of_manufacture <> '')
THEN
(vehicles.month_of_manufacture || '/' ||
vehicles.year_of_manufacture)
ELSE
''
END
) AS date_of_manufacture,
vehicles.identification_number, vehicles.engine_number from
ro_header
INNER JOIN vehicles USING (vehicle_address)
WHERE ro_header.received_date between '1-jan-2007' AND '10-May-2007';
ALTER TABLE invoiced_repairs OWNER TO postgres;
Instead of having it set to 1-Jan-2007 and 10-May-2007 for the dates,
can I specify that those values should be passed to the view? Or would I
need to change this to an SQL language function?
I can't find anything in the documentation that answers this, but maybe
I'm not looking hard enough.
Thanks in advance.
--
Paul Lambert
Database Administrator
AutoLedgers
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2007-05-10 06:03 Passing input to a view? Paul Lambert <paul.lambert@autoledgers.com.au>
2007-05-10 06:14 ` A. Kretschmer <andreas.kretschmer@schollglas.com>
2007-05-10 06:14 ` Phillip Smith <phillip.smith@weatherbeeta.com.au>
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