ClickHouse/tests/queries/0_stateless/00753_comment_columns_zookeeper.sql

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DROP TABLE IF EXISTS test.check_comments;
CREATE TABLE test.check_comments
(
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column_name1 UInt8 DEFAULT 1 COMMENT 'comment',
column_name2 UInt8 COMMENT 'non default comment'
) ENGINE = ReplicatedMergeTree('clickhouse/tables/test_comments', 'r1')
ORDER BY column_name1;
SHOW CREATE test.check_comments;
DESC test.check_comments;
ALTER TABLE test.check_comments COMMENT COLUMN column_name1 'another comment';
SHOW CREATE test.check_comments;
DESC test.check_comments;
SELECT * FROM system.columns WHERE table = 'check.comments' and database = 'test';
DROP TABLE test.check_comments;