Filters over numeric, boolean, or datetime fields that are indexed as fast fields can be “pushed down” into the BM25 index using the @@@ operator. For instance, the following two queries produce identical results, but the second query “pushes down” the rating > 2 filter into the BM25 index. 
-- Without BM25 pushdown
SELECT description, rating, category
FROM mock_items
WHERE description @@@ 'shoes' AND rating > 2;

-- With BM25 pushdown
SELECT description, rating, category
FROM mock_items
WHERE description @@@ 'shoes' AND rating @@@ '>2';
Automatically executing the first type of query as the second query is on the roadmap, but not yet supported.

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Numeric Filter

The following query returns all rows matching description:shoes where rating equals 4. 
SELECT description, rating, category
FROM mock_items
WHERE description @@@ 'shoes' AND rating @@@ '4';
Comparison operators >, >=, <, and <= are supported. 
SELECT description, rating, category
FROM mock_items
WHERE description @@@ 'shoes' AND rating @@@ '>=4';

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Datetime Filter

RFC 3339 formatted dates wrapped in double quotes can be used to filter over datetime fields. 
SELECT description, rating, category
FROM mock_items
WHERE description @@@ 'shoes' AND created_at @@@ '"2023-04-20T16:38:02Z"';

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Boolean Filter

Boolean fields can be filtered with true or false. 
SELECT description, rating, category
FROM mock_items
WHERE description @@@ 'shoes' AND in_stock @@@ 'true';

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Range Filter

The inclusive [] and exclusive {} bounds can be used for range filtering. 
-- Numeric
SELECT description, rating, category
FROM mock_items
WHERE description @@@ 'shoes' AND rating @@@ '[1 TO 4]';

-- Datetime
SELECT description, rating, category
FROM mock_items
WHERE description @@@ 'shoes' AND created_at @@@ '[2020-01-31T00:00:00Z TO 2024-01-31T00:00:00Z]';
Range filters can also be applied over text fields. The following query finds all documents where description contains a token that is lexicographically between book and camera (i.e. would come between book and camera in a dictionary). 
SELECT description, rating, category
FROM mock_items
WHERE description @@@ '[book TO camera]';

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Set Filter

The IN operator finds documents that match at least one element in a set. 
SELECT description, rating, category
FROM mock_items
WHERE description @@@ 'shoes' AND rating @@@ 'IN [2 3 4]';