ClickHouse/tests/queries/0_stateless/02008_materialize_column.sql

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2021-08-12 07:38:36 +00:00
DROP TABLE IF EXISTS tmp;
SET mutations_sync = 2;
CREATE TABLE tmp (x Int64) ENGINE = MergeTree() ORDER BY tuple() PARTITION BY tuple();
INSERT INTO tmp SELECT * FROM system.numbers LIMIT 20;
ALTER TABLE tmp ADD COLUMN s String DEFAULT toString(x);
SELECT groupArray(x), groupArray(s) FROM tmp;
ALTER TABLE tmp MODIFY COLUMN s String DEFAULT toString(x+1);
SELECT groupArray(x), groupArray(s) FROM tmp;
ALTER TABLE tmp MATERIALIZE COLUMN s;
ALTER TABLE tmp MODIFY COLUMN s String DEFAULT toString(x+2);
SELECT groupArray(x), groupArray(s) FROM tmp;
ALTER TABLE tmp MATERIALIZE COLUMN s;
ALTER TABLE tmp MODIFY COLUMN s String DEFAULT toString(x+3);
SELECT groupArray(x), groupArray(s) FROM tmp;
ALTER TABLE tmp DROP COLUMN s;
ALTER TABLE tmp ADD COLUMN s String MATERIALIZED toString(x);
SELECT groupArray(x), groupArray(s) FROM tmp;
ALTER TABLE tmp MODIFY COLUMN s String MATERIALIZED toString(x+1);
SELECT groupArray(x), groupArray(s) FROM tmp;
ALTER TABLE tmp MATERIALIZE COLUMN s;
ALTER TABLE tmp MODIFY COLUMN s String MATERIALIZED toString(x+2);
SELECT groupArray(x), groupArray(s) FROM tmp;
ALTER TABLE tmp MATERIALIZE COLUMN s;
ALTER TABLE tmp MODIFY COLUMN s String MATERIALIZED toString(x+3);
SELECT groupArray(x), groupArray(s) FROM tmp;
ALTER TABLE tmp DROP COLUMN s;
DROP TABLE tmp;