On Wed, Nov 25, 2009 at 9:52 PM, Andreas Kahl <andreas_k...@gmx.net> wrote:
> Hello, > > are there any general criteria when to use Analyzers to implement an > indexing function and when it is better to use UpdateRequestProcessors? > > The main difference I found in the documentation was that > UpdateRequestProcessors are able to manipulate several fields at once > (create, read, update, delete), while Analyzers operate on the contents of a > single field at once. > > Analyzers can only change indexed content. If a field is marked as "stored", then it is stored and retrieved un-modified. If you want to modify the "stored" part as well, then only an UpdateRequestProcessor can do that. In other words, the field's value after applying UpdateRequestProcessors is fed into analyzers (for indexed field) and stored verbatim (for stored fields). -- Regards, Shalin Shekhar Mangar.
