> Yes, that seems like a very appealing approach. There is plenty of > bit-space available in xinfo, and we could reserve a bit each for > nrels, nsubxacts, and nmsgs, with set meaning that an integer count of > that item is present and clear meaning that the count is omitted from > the structure (and zero). This will probably require a bit of tricky > code reorganization so I think it should be done separately from the > main patch.
Ok, I'll try and send a patch with this change only. BTW xinfo is 32 bit long, but I think only 2 bits are used right now? I think I can make it a 8 bits, and add another 8 bits for nrels, nsubxacts, and nmsgs and the new thing. That should save another 2 bytes, while leaving space for extention. Or we can make it a 8 bits only, but only 2 bits would be left "empty" for future extentions; I don't know if we care about it... Leonardo -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers