SET allow_suspicious_low_cardinality_types=1; DROP TABLE IF EXISTS test_table; DROP TABLE IF EXISTS test_table__fuzz_3; CREATE TABLE test_table (`id` Float32, `value` Float32) ENGINE = MergeTree ORDER BY id; INSERT INTO test_table VALUES (-10.75, 95.57); CREATE TABLE test_table__fuzz_3 (`id` LowCardinality(Nullable(Float32)), `value` Float32) ENGINE = MergeTree ORDER BY id SETTINGS allow_nullable_key=1; insert into test_table__fuzz_3 select * from generateRandom() limit 10; SELECT * FROM (SELECT CAST('104857.5', 'Float32'), corr(NULL, id, id) AS corr_value FROM test_table__fuzz_3 GROUP BY value) AS subquery ANTI LEFT JOIN test_table ON subquery.corr_value = test_table.id format Null; DROP TABLE IF EXISTS test_table; DROP TABLE IF EXISTS test_table__fuzz_3;