DROP TABLE IF EXISTS test; CREATE TABLE test (a UInt8, b UInt8) ENGINE = MergeTree ORDER BY (a, b) SETTINGS index_granularity = 1, primary_key_ratio_of_unique_prefix_values_to_skip_suffix_columns = 0.01; SET optimize_move_to_prewhere = 0; INSERT INTO test SELECT number DIV 2, number FROM numbers(3); SELECT count() FROM test WHERE b >= 0; DETACH TABLE test; ATTACH TABLE test; SELECT count() FROM test WHERE b >= 0; DROP TABLE test;