DROP TABLE IF EXISTS t_ab1; DROP TABLE IF EXISTS t_ab2; CREATE TABLE t_ab1 (id Nullable(Int32), a UInt16, b UInt8) ENGINE = TinyLog; CREATE TABLE t_ab2 (id Nullable(Int32), a Int16, b Nullable(Int64)) ENGINE = TinyLog; INSERT INTO t_ab1 VALUES (0, 1, 1), (1, 2, 2); INSERT INTO t_ab2 VALUES (2, -1, 1), (3, 1, NULL), (4, 1, 257), (5, 1, -1), (6, 1, 1); {% for join_type in ['hash', 'full_sorting_merge', 'partial_merge'] -%} SELECT '=== {{ join_type }} ==='; SET join_algorithm = '{{ join_type }}'; SELECT '= full using ='; SELECT a, b FROM t_ab1 FULL JOIN t_ab2 USING (a, b) ORDER BY ifNull(t_ab1.id, t_ab2.id); SELECT '= left using ='; SELECT a, b FROM t_ab1 LEFT JOIN t_ab2 USING (a, b) ORDER BY ifNull(t_ab1.id, t_ab2.id); SELECT '= right using ='; SELECT a, b FROM t_ab1 RIGHT JOIN t_ab2 USING (a, b) ORDER BY ifNull(t_ab1.id, t_ab2.id); SELECT '= inner using ='; SELECT a, b FROM t_ab1 INNER JOIN t_ab2 USING (a, b) ORDER BY ifNull(t_ab1.id, t_ab2.id); SELECT '= full on ='; SELECT a, b, t_ab2.a, t_ab2.b FROM t_ab1 FULL JOIN t_ab2 ON (t_ab1.a == t_ab2.a AND t_ab1.b == t_ab2.b) ORDER BY ifNull(t_ab1.id, t_ab2.id); SELECT '= left on ='; SELECT a, b, t_ab2.a, t_ab2.b FROM t_ab1 LEFT JOIN t_ab2 ON (t_ab1.a == t_ab2.a AND t_ab1.b == t_ab2.b) ORDER BY ifNull(t_ab1.id, t_ab2.id); SELECT '= right on ='; SELECT a, b, t_ab2.a, t_ab2.b FROM t_ab1 RIGHT JOIN t_ab2 ON (t_ab1.a == t_ab2.a AND t_ab1.b == t_ab2.b) ORDER BY ifNull(t_ab1.id, t_ab2.id); SELECT '= inner on ='; SELECT a, b, t_ab2.a, t_ab2.b FROM t_ab1 INNER JOIN t_ab2 ON (t_ab1.a == t_ab2.a AND t_ab1.b == t_ab2.b) ORDER BY ifNull(t_ab1.id, t_ab2.id); SELECT '= agg ='; SELECT sum(a), sum(b) FROM t_ab1 FULL JOIN t_ab2 USING (a, b); SELECT sum(a), sum(b) FROM t_ab1 LEFT JOIN t_ab2 USING (a, b); SELECT sum(a), sum(b) FROM t_ab1 RIGHT JOIN t_ab2 USING (a, b); SELECT sum(a), sum(b) FROM t_ab1 INNER JOIN t_ab2 USING (a, b); SELECT sum(a) + sum(t_ab2.a) - 1, sum(b) + sum(t_ab2.b) - 1 FROM t_ab1 FULL JOIN t_ab2 ON (t_ab1.a == t_ab2.a AND t_ab1.b == t_ab2.b); SELECT sum(a) + sum(t_ab2.a) - 1, sum(b) + sum(t_ab2.b) - 1 FROM t_ab1 LEFT JOIN t_ab2 ON (t_ab1.a == t_ab2.a AND t_ab1.b == t_ab2.b); SELECT sum(a) + sum(t_ab2.a) - 1, sum(b) + sum(t_ab2.b) - 1 FROM t_ab1 RIGHT JOIN t_ab2 ON (t_ab1.a == t_ab2.a AND t_ab1.b == t_ab2.b); SELECT sum(a) + sum(t_ab2.a) - 1, sum(b) + sum(t_ab2.b) - 1 FROM t_ab1 INNER JOIN t_ab2 ON (t_ab1.a == t_ab2.a AND t_ab1.b == t_ab2.b); SELECT '= types ='; SELECT any(toTypeName(a)) == 'Int32' AND any(toTypeName(b)) == 'Nullable(Int64)' FROM t_ab1 FULL JOIN t_ab2 USING (a, b); SELECT any(toTypeName(a)) == 'Int32' AND any(toTypeName(b)) == 'Nullable(Int64)' FROM t_ab1 LEFT JOIN t_ab2 USING (a, b); SELECT any(toTypeName(a)) == 'Int32' AND any(toTypeName(b)) == 'Nullable(Int64)' FROM t_ab1 RIGHT JOIN t_ab2 USING (a, b); SELECT any(toTypeName(a)) == 'Int32' AND any(toTypeName(b)) == 'Nullable(Int64)' FROM t_ab1 INNER JOIN t_ab2 USING (a, b); SELECT * FROM ( SELECT a, b as "_CAST(a, Int32)" FROM t_ab1 ) t_ab1 FULL JOIN t_ab2 USING (a) FORMAT Null; {% endfor %} DROP TABLE IF EXISTS t_ab1; DROP TABLE IF EXISTS t_ab2;