On 06/23/2009 02:37 PM, Alexander Staubo wrote:
(That said, I believe PostgreSQL diffs tuple updates, so in practice
PostgreSQL might not be writing anything if you run an "update" with
the same value. I will let someone more intimate with the internal
details of updates to comment on this.)
No, it does not do that by default.
You can write a trigger to do that though - and there is one packaged
with the core version in the upcoming 8.4 version.
Andres
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