Lucene just makes rdms system faster. On Wed, 27 Dec 2017 at 17:08 Riccardo Tasso <riccardo.ta...@gmail.com> wrote:
> Hi, > I am not aware of any lucene integration with rdbms but I don't think it > would be very usefull, what do you mean with "guideline for using Lucene > with Database"?. > > Sometimes it makes sense a database integration with lucene (for example > Neo4J and OrientDB use lucene as one of their indexing engine), but it > depends on the specific vendor. Depending on your database, please check if > it already has some kind of fuzzy search (for example recent version of > Postgres has fuzzy search: > https://www.postgresql.org/docs/9.1/static/fuzzystrmatch.html). > > If you decide to use lucene for your use case I don't think RAMDirectory > would be the best choice, since it's intended for testing purposes only. > The FSDirectory should be efficient enough for your (and many other) use > cases. The second point seems ok to me, if entity types are not very > dynamic you can obtain good performance creating an index for each one. > > 2017-12-21 12:48 GMT+01:00 Kumar, Santosh <santosh.kuma...@sap.com>: > > > > > Hi, > > I’m currently working on project which has the following scenario: > > > > > > 1. I have entities in DB on which I would like to prevent duplicates > by > > same name or near match, for example, SalesOrder or SlsOrd or SalesOrd > > etc…are all considered same. For this, I would like to use fuzzy search > and > > return only entities depending on a matching criterion (say, return > > entities with match >=60%). > > 2. How do I approach this use case? Should I create one index > > (IndexWriter with RAMDirectory?) for the entire application and keep > > updating the index (in the background as a separate micro service) and > > whenever, a new entity is created or updated or removed (I need real time > > updates, can’t wait for bulk updates on index) update the index as well? > > 3. I can then use the index created above as lookup when a user tries > > to create a new entity and generate error or warning message. > > > > If the 2nd point above is fine, then is there any general guideline or > > example that I can follow for creating a global index for the > application? > > Also, is there any guideline for using Lucene with Database. > > > > Appreciate your help!!! > > > > Thank you and Regards, > > Santosh > > > -- Sent from Gmail IPad
