DROP TABLE IF EXISTS perf_lc_num CREATE TABLE perf_lc_num( num UInt8, arr Array(LowCardinality(Int64)) default [num] ) ENGINE = MergeTree() ORDER BY tuple() INSERT INTO perf_lc_num (num) SELECT toUInt8(number) FROM numbers(1500000000) SELECT count() FROM perf_lc_num WHERE num = 42 SELECT count() FROM perf_lc_num WHERE arr[1] = 42 SELECT count() FROM perf_lc_num WHERE has(arr, 42) SELECT count() FROM perf_lc_num WHERE indexOf(arr, 42) > 0 SELECT count() FROM perf_lc_num WHERE arr[1] = num SELECT count() FROM perf_lc_num WHERE has(arr, num) SELECT count() FROM perf_lc_num WHERE indexOf(arr, num) > 0 SELECT count() FROM perf_lc_num WHERE has(arr, num * 10) SELECT count() FROM perf_lc_num WHERE has(arr, (num * 1000 + 20) % 137) DROP TABLE IF EXISTS perf_lc_num