Otis Gospodnetic wrote:
Geoff,
Whether synonyms are applied at index time or query time is
controlled via schema.xml - it depends on where you put the synonym
factory, whether in the index-time or query-time section of a
fieldType. Synonyms are read once on start, I believe. It might be
good to have them read at index reader open time, as is done with
elevate component...
I'm looking a bit more into this now.
I don't think you need synonyms applied at both query and index time if
you're using expand - one or the other ought to work properly. in fact,
I suspect I'm the last person to figure this out ;)
the question is, then, which is the more efficient place to apply them?
my first inclination is to apply them (and other similar expanding
mechanisms) to just the index so that the expansion happens only once
and is held in (an efficient) index as opposed to manipulating every query.
the SpellCheckerRequestHandler example on the wiki has the opposite
configuration, expanding synonyms on (only) the query.
thoughts on which approach is the more efficient one?
--Geoff
