DROP TABLE IF EXISTS alter_00147; CREATE TABLE alter_00147 (d Date DEFAULT toDate('2015-01-01'), n Nested(x String)) ENGINE = MergeTree(d, d, 8192); INSERT INTO alter_00147 (`n.x`) VALUES (['Hello', 'World']); SELECT * FROM alter_00147; SELECT * FROM alter_00147 ARRAY JOIN n; SELECT * FROM alter_00147 ARRAY JOIN n WHERE n.x LIKE '%Hello%'; ALTER TABLE alter_00147 ADD COLUMN n.y Array(UInt64); SELECT * FROM alter_00147; SELECT * FROM alter_00147 ARRAY JOIN n; SELECT * FROM alter_00147 ARRAY JOIN n WHERE n.x LIKE '%Hello%'; INSERT INTO alter_00147 (`n.x`) VALUES (['Hello2', 'World2']); SELECT * FROM alter_00147 ORDER BY n.x; SELECT * FROM alter_00147 ARRAY JOIN n ORDER BY n.x; SELECT * FROM alter_00147 ARRAY JOIN n WHERE n.x LIKE '%Hello%' ORDER BY n.x; OPTIMIZE TABLE alter_00147; SELECT * FROM alter_00147 ORDER BY n.x; SELECT * FROM alter_00147 ARRAY JOIN n ORDER BY n.x; SELECT * FROM alter_00147 ARRAY JOIN n WHERE n.x LIKE '%Hello%' ORDER BY n.x; DROP TABLE alter_00147;