Skip site navigation (1) Skip section navigation (2)

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: (view raw or whole thread)
Lists: pgsql-patches
This has been saved for the 8.1 release:



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.
>     INSERT|DELETE|UPDATE [OR...] ON tablename
>     [REFERENCING OLD|NEW [AS] identifier]
>     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                        |
  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

In response to


pgsql-patches by date

Next:From: Tom LaneDate: 2004-12-13 03:10:50
Subject: Re: Optional REFERENCES Feature in CREATE TRIGGER Command
Previous:From: Tom LaneDate: 2004-12-13 00:34:04
Subject: Re: pg_get_viewdef returns one paren too much

Privacy Policy | About PostgreSQL
Copyright © 1996-2015 The PostgreSQL Global Development Group