PostgreSQL allows setting of a default value for a column, triggers are not needed for this task. See my reply to another node in this thread at Re: Re: Cleaning Up Apache::Session data.

Update: Triggers are what's desired here since he wants to update the rows ald set the time also.

In reply to Re: Re: Re: Cleaning Up Apache::Session data by dga
in thread Cleaning Up Apache::Session data by grantm

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