iog...@free.fr escribió:

> A simple use case would be to update a timestamp column with
> CURRENT_TIMESTAMP as instance.

No, because you want to update the timestamp in all cases, whatever
columns the update actually updates.

-- 
Alvaro Herrera                                http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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