From: Garrett Murphy <gmurphy@lawlogix.com>
To: pgsql-sql@postgresql.org
Subject: Re: Trigger on select :-(
Date: Thu, 11 Mar 2010 11:33:59 -0500
Message-ID: <076DC33A3D38CE4BBC64D35DDD9DE70C0A283D04@mse4be2.mse4.exchange.ms> (raw)
In-Reply-To: <CMEFJOLLJJDJKKLGEJJMOELBDDAA.ray@madigans.org>
References: <CMEFJOLLJJDJKKLGEJJMOELBDDAA.ray@madigans.org>
Are you able to set up a SELECT query to get the result you want? If
you are, it's as simple as putting "CREATE VIEW viewname AS ", followed
by your query.
Garrett Murphy
_____________________________________________
From: pgsql-sql-owner@postgresql.org
[mailto:pgsql-sql-owner@postgresql.org] On Behalf Of Ray Madigan
Sent: Monday, March 01, 2010 7:11 PM
To: pgsql-sql@postgresql.org
Subject: [SQL] Trigger on select :-(
What I want is to have a trigger on select, but since I have searched
the archives I know that is not possible. I also read that view rules
is the technology is whats available. Having never used views before I
can't seem to get my mind to figure out what I need to do to solve my
problem.
I have a table that defines a key that I will use in another table in a
list of items defined in the previous table.
The tables are
CREATE TABLE Foo ( INTEGER key not null primary key,
... characteristics for the Foo item
);
CREATE TABLE Catalog ( INTEGER FooKey FOREIGN KEY,
... other catalog data );
The catalog will have rows that reference the elements in the Foo table.
I also have another table that references the Foo table
CREATE TABLE ToDo ( INTEGER FooKey FOREIGN KEY,
... other ToDo information.
What I want to do is when I do a SELECT on the Catalog and deliver the
result to the user, I want to check to see if the FooKey is in the users
ToDo table and set the value of a column isToDo to true or false
depending on if the FooKey exists in the ToDo table for the user. If I
were building a table I would use a trigger and select on the row in the
ToDo table.
Please, all I want is an idea where to start, what I should read and I
will figure out how to do it.
Thanks in advance. << File: ATT4311246.txt >>
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To: pgsql-sql@postgresql.org
Cc: gmurphy@lawlogix.com
Subject: Re: Trigger on select :-(
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