> dan@xxxxxxxxx escribió: >> > dan@xxxxxxxxx escribió: >> > >> >> where libinstance.libdate <= 1238445044 >> >> and libinstance.enddate > 1238445044 >> >> and libinstance.libinstanceid = libobject.libinstanceid >> >> and libinstance.architecture = ? >> > >> > How are you generating the explain? My bet is that you're just >> > substituting a literal in the architecture condition, but if the >> driver >> > is smart then maybe it's preparating the query beforehand. You'll get >> a >> > different plan in that case. >> >> I don't think so. Perl's DBI is involved, but the statement's in a >> variable. > > So what's the "?" in the query you pasted earlier? The first ? (for architecture) is 1, the second ? (for branchid) is 0. They both should get passed to Postgres as $1 and $2, respectively, assuming DBD::Pg does its substitution right. (They're both supposed to go in as placeholders) -Dan -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
