DROP TABLE IF EXISTS primary_key; set allow_deprecated_syntax_for_merge_tree=1; CREATE TABLE primary_key (d Date DEFAULT today(), x Int8) ENGINE = MergeTree(d, -x, 1); INSERT INTO primary_key (x) VALUES (1), (2), (3); SELECT x FROM primary_key ORDER BY x; SELECT 'a', -x FROM primary_key WHERE -x < -3; SELECT 'b', -x FROM primary_key WHERE -x < -2; SELECT 'c', -x FROM primary_key WHERE -x < -1; SELECT 'd', -x FROM primary_key WHERE -x < toInt8(0); DROP TABLE primary_key;