range_term is the equivalent of Postgres’ operators over range types. It supports operations like range containment, overlap, and intersection.

​
Term Within

In this example, weight_range is an int4range type. The following query finds all rows where weight_range contains 1: 
SELECT id, weight_range FROM mock_items
WHERE weight_range @@@ pdb.range_term(1);

​
Range Intersects

The following query finds all ranges that share at least one common point with the query range: 
SELECT id, weight_range FROM mock_items
WHERE weight_range @@@ pdb.range_term('(10, 12]'::int4range, 'Intersects');

​
Range Contains

The following query finds all ranges that are contained by the query range: 
SELECT id, weight_range FROM mock_items
WHERE weight_range @@@ pdb.range_term('(3, 9]'::int4range, 'Contains');

​
Range Within

The following query finds all ranges that contain the query range: 
SELECT id, weight_range FROM mock_items
WHERE weight_range @@@ pdb.range_term('(2, 11]'::int4range, 'Within');