once 30000 DROP TABLE IF EXISTS test_bf CREATE TABLE test_bf (`id` int, `ary` Array(String), INDEX idx_ary ary TYPE bloom_filter(0.01) GRANULARITY 8192) ENGINE = MergeTree() ORDER BY id SYSTEM STOP MERGES INSERT INTO test_bf SELECT number AS id, [CAST(id, 'String'), CAST(id + 1, 'String'), CAST(id + 2, 'String')] FROM system.numbers LIMIT 3000000 SYSTEM START MERGES DROP TABLE IF EXISTS test_bf