2009/10/19 Robert Haas <robertmh...@gmail.com>: > On Mon, Oct 19, 2009 at 12:48 PM, Dean Rasheed > <dean.a.rash...@googlemail.com> wrote: >> This is a WIP patch to replace the after-trigger queues with TID bitmaps >> to prevent them from using excessive amounts of memory. Each round of >> trigger executions is a modified bitmap heap scan. > > If the bitmap becomes lossy, how do you preserve the correct semantics? > > ...Robert >
The idea is that it filters by the transaction ID and command ID of modified rows to see what's been updated in the command(s) the trigger is for... - Dean -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
