Re: Optional REFERENCES Feature in CREATE TRIGGER Command

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: hyip(at)site(dot)uottawa(dot)ca
Cc: pgsql-patches(at)postgresql(dot)org
Subject: Re: Optional REFERENCES Feature in CREATE TRIGGER Command
Date: 2004-12-13 02:49:52
Message-ID: 200412130249.iBD2nqv02443@candle.pha.pa.us
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hyip(at)site(dot)uottawa(dot)ca wrote:
> Hi,
>
> The attached patch adds the optional REFERENCES syntax in CREATE TRIGGER
> statement to make an automatic alias for OLD/NEW record during trigger
> setup. The implementation of this new feature makes CREATE TRIGGER
> command more compatible to SQL standard, and allows the future
> implementation of executing SQL commands in trigger action.
>
> After the implementation, the extended syntax of statement is as follows.
>
> CREATE TRIGGER name BEFORE|AFTER
> INSERT|DELETE|UPDATE [OR...] ON tablename
> [REFERENCING OLD|NEW [AS] identifier]
> [FOR [EACH] ROW|STATEMENT]
> EXECUTE PROCEDURE funcname (arguments)
>
> The patch will also update two columns, condition_reference_old_table and
> condition_reference_new_table with alias names of the OLD/NEW record in
> the Triggers table of the information schema.

[ Attachment, skipping... ]

>
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--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
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