An approach I've used successfully is to add a separate field called
'empty' and include the names of other fields that are empty, e.g,
empty: subject
You can search for;
+empty:subject
for messages with empty (null) subjects.
This approach means you don't need to think of a magical value
Hi George,
A field value needs to be indexed if you want to sort by it - see
http://www.lucenebook.com/search?query=index+for+sorting .
As for null fields, you could use an empty string, or better yet, some
"custom field value" that means "NULL" for your application.
Otis
--- George Abraham <[
Hi,
I am using Lucene to index database content. I have two questions:
1. Along with some of the fields that I want indexed, there are some
fields that I want stored (not indexed) in the index so as to return
with hits. However I also want to be able to sort a search result
using these non-indexed
