From: Andriy Pyrozhenko <andriy.pyrozhenko@vanjaonline.com>
To: pgsql-sql@postgresql.org
Subject: Re: Question
Date: Fri, 23 Nov 2001 09:14:54 +0200
Message-ID: <1721749786.20011123091454@vanjaonline.com> (raw)
In-Reply-To: <GNELIHDDFBOCMGBFGEFOCEIHCAAA.chriskl@familyhealth.com.au>
References: <GNELIHDDFBOCMGBFGEFOCEIHCAAA.chriskl@familyhealth.com.au>
Hello Christopher,
I don't need delete record from jobs when I delete record from
activity. But I need delete record from activity when I delete the
record from jobs and I need to find this job_id in activities table!
What must I do?
CKL> Question: Why don't you just set up a foreign key that will achieve exactly
CKL> the same thing without using RULEs?
CKL> ie. ALTER TABLE activities ADD FOREIGN KEY (job_id) REFERENCES jobs(job_id)
CKL> ON DELETE CASCADE;
CKL> Chris
>> I have the rule for table
>> CREATE RULE del_jobs_del_activity AS ON DELETE TO jobs DO
>> DELETE FROM activities WHERE job_id = OLD.job_id;
>>
>> When i call:
>> DELETE FROM jobs WHERE job_id IN (SELECT DISTINCT job_id FROM
>> activities WHERE load_no = OLD.load_no)
>> This query does not delete the record from jobs but delete the
>> record by rule.
Best regards,
Andriy mailto:andriy.pyrozhenko@vanjaonline.com
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To: pgsql-sql@postgresql.org
Cc: andriy.pyrozhenko@vanjaonline.com
Subject: Re: Question
In-Reply-To: <1721749786.20011123091454@vanjaonline.com>
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