on update of table set timestamp

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PostgreSQL 8.4

I want to add a timestamp column to some of my important table such that
whenever an SQL "update" command is executed on the table the
"updated_timestamp" timestamp column would be set with "now()". Is
there a way to do this? I know I could go through and change my SQL all
over the place to update a column "updated_timestamp" with "now()" but
it would be faster if there was some way to set a constraint and/or
default value on the field. Is this possible. I don't really want to
do store procedures.=20

=20

Thanks,

=20

Lance Campbell

Software Architect/DBA/Project Manager

Web Services at Public Affairs

217-333-0382

=20


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Re: on update of table set timestamp

"Campbell, Lance" wrote:

> I want to add a timestamp column to some of my important table
> such that whenever an SQL "update" command is executed on the
> table the "updated_timestamp" timestamp column would be set with
> "now()".

I would write one function which I would bind as a BEFORE UPDATE
trigger to all the tables with the updated_timestamp column. You
don't need to write a separate function for each table.

-Kevin

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