Re: Patch: add conversion from pg_wchar to multibyte
Robert Haas <robertmhaas@gmail.com>
From: Robert Haas <robertmhaas@gmail.com>
To: Erik Rijkers <er@xs4all.nl>
Cc: aekorotkov@gmail.com, pgsql-hackers@postgresql.org
Date: 2012-04-30T18:07:26Z
Lists: pgsql-hackers
On Sun, Apr 29, 2012 at 8:12 AM, Erik Rijkers <er@xs4all.nl> wrote: > Perhaps I'm too early with these tests, but FWIW I reran my earlier test program against three > instances. (the patches compiled fine, and make check was without problem). These tests results seem to be more about the pg_trgm changes than the patch actually on this thread, unless I'm missing something. But the executive summary seems to be that pg_trgm might need to be a bit smarter about costing the trigram-based search, because when the number of trigrams is really big, using the index is counterproductive. Hopefully that's not too hard to fix; the basic approach seems quite promising. (I haven't actually looked at the patch on this thread yet to understand how it fits in; the above comments are about the pg_trgm regex stuff.) -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company