Hi,
Thank you for the reply. Here is an example of a scoring behavior I'm
talking about:
a) given a user query a set of documents is produced. Let's call
this set S.
b) suppose each document has a numeric field called "F".
The average of this field values for the set of documents S is
calculated. Let's call this average A.
So is A = sum(F) / N, sum(F) is the sum of the values of field
F for each document in S, and N is |S|, the number of documents in S.
c) final score for each document is the deviation from the average:
score = F - A.
So, in order to calculate the score for each document, I need to know
"A", which depends on *all* documents produced by the query. This is a
simplified example, the actual score calculation is more involved.
Here is a different case, where I might like to know all the documents
produce by a query in order to score them: I have an external server
that handles the actual score calculation for each document,
communicating millions of documents to this server one document at a
time is expensive. I would prefer to first get all the documents
selected by a query, then send all of this info to the server and get
one reply containing custom scores for all the documents at once.
While I'm at it, a quick additional question: the rescore query and
post_filter look interesting. Is there any native (java) api to
implement custom re-scorer or custom post_filter? Just a link to api
would be very helpful.
Thank you again,
ZS
On 09/11/2014 08:20 PM, vineeth mohan wrote:
Hello ,
Can you give a more elaborate explanation on the behavior of scoring
you want ?
I dont see any direct way to achieve this.
Also re-scoring might interest you -
http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-rescore.html
Thanks
Vineeth
On Thu, Sep 11, 2014 at 11:19 PM, <[email protected]
<mailto:[email protected]>> wrote:
Hello everyone,
I've been playing with native scripts and have a few questions:
Is there any notion of context for native scripts?
For example, is there a way to know that a method
"runAsDouble", for example, is called for the last time?
I might, for instance, like to send some sort of statistics
after a search is done.
Is there any way to know how many documents the search
produced, beforehand?
I might want to do some pre calculations based on this number
before the actual scoring begins.
Is there any way to get all the documents (or ids) somehow to
process (score) them in bulk?
My scoring might depend on the search result, I might want to
calculate an average of a search result field and base my scores
on this number.
I apologize in advance, if some of my questions are
uninformed. I'm new to ES, trying to switch from Solr.
Thank you,
ZS
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