: Is there a consise way to query just a single field
: from a solr query?
At the moment, there isn't anything more concise then what you are already
getting.
What you can do though, is write a custom request handler that meets your
needs. You wouldn't even need to loop over the Documents, you could use
the FieldCache, something like this...
public void handleRequest(SolrQueryRequest req, SolrQueryResponse rsp) {
...
Query q = // build your query however you want
DocSet docs = req.getSearcher().getDocSet(q);
StringBuffer buf = new StringBuffer();
ints[] ids = FieldCache.DEFAULT.getInts
(req.getSearcher().getReader(), "id");
for (DocIterator i = docs.iterator(); i.hasNext(); ) {
buf.append(ids[docs.nextDoc()]);
buf.append(" ");
}
rsp.add("ids", buf.toString());
}
(if id isn't a simple int or string, you'll need to convert it, take a
look at SolrIndexSearcher.getSchema(), IndexSchema.getFieldType(), and
FieldType.indexedToReadable)
BUT! ... if you're going to write a custom handler, you might consider
what you're doing with those ids in your client, and wether it would make
sense to put that logic in the plugin -- and really cut down on the data
sent over the wire. (Forgive me, i don't really get what an "olap cube"
is)
-Hoss
