Re: hooks for supporting third party blobs?

On Mon, Dec 06, 2004 at 05:11:21PM -0800, Eric Davies wrote:

> Is anyone aware of any hooks to support schemes such as ours, or has solved
> a similar problem?

There's RegisterXactCallback() and RegisterSubXactCallback() functions
that may be what you want. They are called whenever a transaction or
subtransaction starts, commits, or aborts. You could probably keep a
list of things modified during the transaction, so you can clean up at
transaction end.

(Much like the storage manager does: it only unlinks files for dropped
tables at transaction commit.)

Make sure to react appropiately at subtransaction abort ...

--
Alvaro Herrera (<alvherre[(at)]dcc(dot)uchile(dot)cl>)
"Si quieres ser creativo, aprende el arte de perder el tiempo"