From: Michael Fuhr <mike@fuhr.org>
To: Yudie <yudie@axiontech.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: plpgsql.. SELECT INTO ... WHERE FIELD LIKE
Date: Thu, 16 Dec 2004 17:46:17 -0700
Message-ID: <20041217004617.GA9115@winnie.fuhr.org> (raw)
In-Reply-To: <001901c4e3ca$7c71aca0$a101a8c0@home.axiontech.com>
References: <001901c4e3ca$7c71aca0$a101a8c0@home.axiontech.com>
On Thu, Dec 16, 2004 at 05:53:43PM -0600, Yudie wrote:
> How in plpgsql use LIKE with a variable?
>
> let say I want to do this query:
>
> SELECT INTO RS id FROM customer WHERE firstname LIKE keyword% LIMIT 1;
>
> keyword is a variable, in this case I want to find name like 'Jo%'
Use the concatenation operator (||):
SELECT ... WHERE firstname LIKE keyword || ''%'' LIMIT 1;
Notice the two single quotes, which are necessary if the function body
is surrounded by quotes. Life gets easier in 8.0 with dollar quoting.
Are you planning to add more code to your PL/pgSQL function? If not,
then you could replace it with a simple SQL function:
CREATE OR REPLACE FUNCTION custlike(TEXT) RETURNS INTEGER AS '
SELECT id FROM customer WHERE firstname LIKE $1 || ''%'' LIMIT 1;
' LANGUAGE sql;
The function will return NULL if it finds no records.
--
Michael Fuhr
http://www.fuhr.org/~mfuhr/
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-sql@postgresql.org
Cc: mike@fuhr.org, yudie@axiontech.com
Subject: Re: plpgsql.. SELECT INTO ... WHERE FIELD LIKE
In-Reply-To: <20041217004617.GA9115@winnie.fuhr.org>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox