thevar1able/ClickHouse
1
0
Fork 0
mirror of https://github.com/ClickHouse/ClickHouse.git synced 2024-12-18 12:22:12 +00:00
Code Issues Packages Projects Releases Wiki Activity

Update column.md

Browse Source
This commit is contained in:
Denny Crane 2021-11-09 17:34:28 -04:00 committed by GitHub
parent d7be766581
commit 8ea209c084
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
docs/en/sql-reference/statements/alter/column.md
View File

@ -212,6 +212,9 @@ SET mutations_sync = 2;
CREATE TABLE tmp (x Int64) ENGINE = MergeTree() ORDER BY tuple() PARTITION BY tuple(); CREATE TABLE tmp (x Int64) ENGINE = MergeTree() ORDER BY tuple() PARTITION BY tuple();
INSERT INTO tmp SELECT * FROM system.numbers LIMIT 10; INSERT INTO tmp SELECT * FROM system.numbers LIMIT 10;
ALTER TABLE tmp ADD COLUMN s String MATERIALIZED toString(x); ALTER TABLE tmp ADD COLUMN s String MATERIALIZED toString(x);
ALTER TABLE tmp MATERIALIZE COLUMN s;
SELECT groupArray(x), groupArray(s) FROM tmp; SELECT groupArray(x), groupArray(s) FROM tmp;
``` ```