mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-22 01:30:51 +00:00
36 lines
1.2 KiB
SQL
36 lines
1.2 KiB
SQL
DROP TABLE IF EXISTS t_materialize_column;
|
|
|
|
CREATE TABLE t_materialize_column (i Int32)
|
|
ENGINE = MergeTree ORDER BY i PARTITION BY i
|
|
SETTINGS min_bytes_for_wide_part = 0;
|
|
|
|
INSERT INTO t_materialize_column VALUES (1);
|
|
|
|
ALTER TABLE t_materialize_column ADD COLUMN s LowCardinality(String) DEFAULT toString(i);
|
|
ALTER TABLE t_materialize_column MATERIALIZE COLUMN s SETTINGS mutations_sync = 2;
|
|
|
|
SELECT name, column, type FROM system.parts_columns
|
|
WHERE table = 't_materialize_column' AND database = currentDatabase() AND active
|
|
ORDER BY name, column;
|
|
|
|
SELECT '===========';
|
|
|
|
INSERT INTO t_materialize_column (i) VALUES (2);
|
|
|
|
SELECT name, column, type FROM system.parts_columns
|
|
WHERE table = 't_materialize_column' AND database = currentDatabase() AND active
|
|
ORDER BY name, column;
|
|
|
|
SELECT '===========';
|
|
|
|
ALTER TABLE t_materialize_column ADD INDEX s_bf (s) TYPE bloom_filter(0.01) GRANULARITY 1;
|
|
ALTER TABLE t_materialize_column MATERIALIZE INDEX s_bf SETTINGS mutations_sync = 2;
|
|
|
|
SELECT name, column, type FROM system.parts_columns
|
|
WHERE table = 't_materialize_column' AND database = currentDatabase() AND active
|
|
ORDER BY name, column;
|
|
|
|
SELECT * FROM t_materialize_column ORDER BY i;
|
|
|
|
DROP TABLE t_materialize_column;
|