Peter Geoghegan <p...@heroku.com> writes: > On Thu, Jan 30, 2014 at 4:34 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: >> Quite aside from the index bloat risk, this effect means a 3-4x reduction >> in the maximum string length that can be indexed before getting the >> dreaded "Values larger than 1/3 of a buffer page cannot be indexed" error. >> Worse, a value insertion might well succeed, with the failure happening >> only (much?) later when that entry is chosen as a page split boundary.
> That's not hard to prevent. If that should happen, we don't go with > the strxfrm() datum. We have a spare IndexTuple bit we could use to > mark when the optimization was applied. You'd need a bit per column, no? regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers