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Update column.md

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Denny Crane 2021-11-09 17:34:28 -04:00 committed by GitHub
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docs/en/sql-reference/statements/alter/column.md
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@ -212,6 +212,9 @@ 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 10;
ALTER TABLE tmp ADD COLUMN s String MATERIALIZED toString(x);
ALTER TABLE tmp MATERIALIZE COLUMN s;
SELECT groupArray(x), groupArray(s) FROM tmp;
```