-- Tags: no-fasttest DROP TABLE IF EXISTS t_subcolumns_sizes; SET allow_experimental_object_type = 1; CREATE TABLE t_subcolumns_sizes (id UInt64, arr Array(UInt64), n Nullable(String), d Object('json')) ENGINE = MergeTree ORDER BY id SETTINGS min_bytes_for_wide_part = 0; INSERT INTO t_subcolumns_sizes FORMAT JSONEachRow {"id": 1, "arr": [1, 2, 3], "n": null, "d": {"k1": "v1", "k2": [{"k3": 1, "k4": "v2"}, {"k3": 3}]}} INSERT INTO t_subcolumns_sizes FORMAT JSONEachRow {"id": 2, "arr": [0], "n": "foo", "d": {"k1": "v3", "k2": [{"k4": "v4"}, {"k3": "v5", "k5": 5}]}} OPTIMIZE TABLE t_subcolumns_sizes FINAL; SELECT column, subcolumns.names AS sname, subcolumns.types AS stype, subcolumns.bytes_on_disk > 0 FROM system.parts_columns ARRAY JOIN subcolumns WHERE database = currentDatabase() AND table = 't_subcolumns_sizes' AND active ORDER BY column, sname, stype; SELECT any(column_bytes_on_disk) = sum(subcolumns.bytes_on_disk), any(column_data_compressed_bytes) = sum(subcolumns.data_compressed_bytes), any(column_data_uncompressed_bytes) = sum(subcolumns.data_uncompressed_bytes), any(column_marks_bytes) = sum(subcolumns.marks_bytes) FROM system.parts_columns ARRAY JOIN subcolumns WHERE database = currentDatabase() AND table = 't_subcolumns_sizes' AND active AND column = 'd'; DROP TABLE IF EXISTS t_subcolumns_sizes;