Re: Optional REFERENCES Feature in CREATE TRIGGER Command

This has been saved for the 8.1 release:

    http:/momjian.postgresql.org/cgi-bin/pgpatches2

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hyip@site.uottawa.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

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