ClickHouse/tests/queries/0_stateless/01915_json_extract_raw_string.sql

select JSONExtract('{"a": "123", "b": 456, "c": [7, 8, 9]}', 'Tuple(a String, b String, c String)');

with '{"string_value":null}' as json select JSONExtract(json, 'string_value', 'Nullable(String)');