I feel this may not be a good example. Since you can easily index field c, a, d and let Lucene to handle the filter "c = 'foo'" and the order by clause"order by a desc, d"
-- Chris Lu ------------------------- Instant Scalable Full-Text Search On Any Database/Application site: http://www.dbsight.net demo: http://search.dbsight.com Lucene Database Search in 3 minutes: http://wiki.dbsight.com/index.php?title=Create_Lucene_Database_Search_in_3_minutes DBSight customer, a shopping comparison site, (anonymous per request) got 2.6 Million Euro funding! On Sat, Feb 28, 2009 at 11:07 AM, <spr...@gmx.eu> wrote: > Hi, > > what is the best approach to merge a database index with a lucene fulltext > index? Both databases store a unique ID per doc. This is the join criteria. > > requirements: > > * both resultsets may be very big (100.000 and much more) > * the merged resultset must be sorted by database index and/or relevance > * optional paging the merged resultset, a page has a size of 1000 docs max. > > example: > > select a, b from dbtable where c = 'foo' and content='bar' order by > relevance, a desc, d > > I would split this into: > > database: select ID, a, b from dbtable where c = 'foo' order by a desc, d > lucene: content:bar (sort:relevance) > merge: loop over the lucene resultset and add the db record into a new list > if the ID matches. > > If the resultset must be paged: > > database: select ID from dbtable where c = 'foo' order by a desc, d > lucene: content:bar (sort:relevance) > merge: loop over the lucene resultset and add the db record into a new list > if the ID matches. > page 1: select a,b from dbtable where ID IN (list of the ID's of page 1) > page 2: select a,b from dbtable where ID IN (list of the ID's of page 2) > ... > > > Is there a better way? > > Thank you. > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > >
