Aggregate functions in lucene queries

[Srividhya Umashanker <sr...@gmail.com>]

Hi group -

I would want do aggregations using lucene. 
Solr does have a feature in function query. 
We are using vanilla lucene.

Example: 

1. Min max avg of a field
2. Count of a particular string in a field
3. Aggregate count, grouped by fields value.

I am thinking facets is the option. Has anyone done it so far?  Is there any other way that you have encountered. 


Please share your thoughts

- Srividhya


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