Apache Solr Reference Guide Covering Apache Solr 6.0

facet(collection1,
q="*:*",
buckets="a_s",
bucketSorts="sum(a_i) desc",
bucketSizeLimit=100,
sum(a_i),
sum(a_f),
min(a_i),
min(a_f),
max(a_i),
max(a_f),
avg(a_i),
avg(a_f),
count(*))
The example above shows a facet function with rollups over a single bucket, where the buckets are returned in
descending order by the calculated value of the sum(a_i) metric.
Example 2:
facet(collection1,
q="*:*",
buckets="year_i, month_i, day_i",
bucketSorts="year_i desc, month_i desc, day_i desc",
bucketSizeLimit=100,
sum(a_i),
sum(a_f),
min(a_i),
min(a_f),
max(a_i),
max(a_f),
avg(a_i),
avg(a_f),
count(*))
The example above shows a facet function with rollups over three buckets, where the buckets are returned in
descending order by bucket value.
stats
The stats function gathers simple aggregations for a search result set. The stats function does not support
rollups over buckets, so the stats stream always returns a single Tuple with the rolled up stats. Under the covers
the stats function pushes down the generation of the stats into the search engine using the StatsComponent.
The stats function currently supports the following metrics: count(*) , sum() , avg() , min() , and max() .
Parameters
Syntax
collection: (Mandatory) Collection the stats will be aggregated from.
q: (Mandatory) The query to build the aggregations from.
metrics: (Mandatory) The metrics to include in the result Tuple. Current supported metrics are sum(col
), avg(col) , min(col) , max(col) and count(*)
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