Re: last tuple affected

I only need to know if a table has changed since the last check
(create, update...), but I want to avoid a trigger + artificial records table.
Is this information recorded somewhere, in a system table perhaps?
What about a hash value refered to any table?

Thanks.

>>Miguel Angel Tribaldos Hervas wrote:
>> Hi all!
>>
>> Two related questions about a problem i'm trying to solve:
>> How can I know the last tuple affected by an insert/update operation per
>> table??
>> Is there exists any function in Postgres for retrieving some hash
>> value from a table??
>
>You don't define what you mean by "last", and it's not a simple thing.
>You could attach triggers to the tables and have them record changes.
>
>Perhaps tell us what you are trying to do, rather than how you want to
>do it.
>--
> Richard Huxton
> Archonet Ltd
>--