Histogram - ParadeDB

The histogram aggregation dynamically creates buckets for a given interval and counts the number of occurrences in each bucket. Each value is rounded down to its bucket. For instance, a rating of 18 with an interval of 5 rounds down to a bucket with key 15.

SELECT pdb.agg('{"histogram": {"field": "rating", "interval": "1"}}')
FROM mock_items
WHERE id @@@ pdb.all();

Expected Response

                                                                                  agg
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------
 {"buckets": [{"key": 1.0, "doc_count": 1}, {"key": 2.0, "doc_count": 3}, {"key": 3.0, "doc_count": 9}, {"key": 4.0, "doc_count": 16}, {"key": 5.0, "doc_count": 12}]}
(1 row)

See the Tantivy documentation for all available options.