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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Lists: | pgsql-patches |
This has been saved for the 8.1 release:
http:/momjian.postgresql.org/cgi-bin/pgpatches2
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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... ]
>
> ---------------------------(end of broadcast)---------------------------
> TIP 9: the planner will ignore your desire to choose an index scan if your
> joining column's datatypes do not match
--
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
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073
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