Ha ha... thx Tino
Yes, I think this is way to go, strange how my mind climbs the wrong tree
sometimes :)
I actually need to aquire a transaction across several dB's, check if the
conditions are right, and then modify some tables, write and remove some
triggers.
Transactions in postgres are 2 sophisticated, I dont think they will hold
the locks at the level I need them.
But I was thinking (climbing out of the wrong tree;)... I can just aquire
exclusive locks on the tables, and hey presto, users are on hold while the
software checks the dB's.
Effectively creating a very rough transaction, with the lock scope needed?
... ie it will keep users out long enough to align several dB's... I'm
hoping?
From: "Tino Wildenhain" <[EMAIL PROTECTED]>
================ maybe I'm in the wrong tree================
Yes I'm thinking that too:
Is it possible to make quick structural changes to postgres, with user
activety?
of course.
Maybe start a transaction that changes structure... wonder if that will
stop or hold user activity???
Usually not - all your DDL is done in a transaction just like any other
access users would make. So it only fails (but as a whole) if you want
to modify locked tables and such. But you would not end up w/ a partly
changed database in any case. Just make sure you do everything in
a transaction. No need to suspend user accounts for that.
Regards
Tino
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