how an app can know when a table is altered ?

From: "valter m" <maweb(at)hotmail(dot)com>
To: pgsql-hackers(at)postgresql(dot)org
Subject: how an app can know when a table is altered ?
Date: 2000-06-13 00:32:06
Message-ID: 20000613003206.37735.qmail@hotmail.com
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i'm developing a framework (mod_perl+apache) that reads the db-schema and
automatically explode html forms.

now i read the schema and cache it into perl-hashes to speedup things.

my problem is to recognize when a table is altered so that the framework can
update the related forms connected to the db tables.
i don't want to read the schema every time (now i must restart apache, and i
don't want to restart ...)

It's possible? How can i implement this ?

Thank you,

valter
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