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min and max return the smallest and largest values of a column, respectively. SQL’s MIN/MAX syntax is supported in beta. To enable it, first run:
SQL
SET paradedb.enable_aggregate_custom_scan TO on;

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Min

The min aggregation returns the smallest value in a field. 
SELECT pdb.agg('{"min": {"field": "rating"}}') FROM mock_items
WHERE id @@@ pdb.all();
Expected Response
      agg
----------------
 {"value": 1.0}
(1 row)
See the Tantivy documentation for all available options.

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SQL Min Syntax

With paradedb.enable_aggregate_custom_scan enabled, the following query is equivalent to the above and is executed in the same way. 
SELECT MIN(rating) FROM mock_items
WHERE id @@@ pdb.all();
By default, MIN ignores null values. Use COALESCE to include them in the final result: 
SELECT MIN(COALESCE(rating, 0)) FROM mock_items
WHERE id @@@ pdb.all();

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Max

The max aggregation returns the largest value in a field. 
SELECT pdb.agg('{"max": {"field": "rating"}}') FROM mock_items
WHERE id @@@ pdb.all();
Expected Response
      agg
----------------
 {"value": 5.0}
(1 row)

​
SQL Max Syntax

With paradedb.enable_aggregate_custom_scan enabled, the following query is equivalent to the above and is executed in the same way. 
SELECT MAX(rating) FROM mock_items
WHERE id @@@ pdb.all();
By default, MAX ignores null values. Use COALESCE to include them in the final result: 
SELECT MAX(COALESCE(rating, 0)) FROM mock_items
WHERE id @@@ pdb.all();