mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-10-01 22:20:50 +00:00
60 lines
1.9 KiB
MySQL
60 lines
1.9 KiB
MySQL
|
DROP TABLE IF EXISTS check_query_comment_column;
|
||
|
|
|
||
|
|
CREATE TABLE check_query_comment_column
|
||
|
|
(
|
||
|
|
first_column UInt8 DEFAULT 1 COMMENT 'first comment',
|
||
|
|
second_column UInt8 MATERIALIZED first_column COMMENT 'second comment',
|
||
|
|
third_column UInt8 ALIAS second_column COMMENT 'third comment',
|
||
|
|
fourth_column UInt8 COMMENT 'fourth comment',
|
||
|
|
fifth_column UInt8
|
||
|
|
) ENGINE = TinyLog;
|
||
|
|
|
||
|
|
SHOW CREATE TABLE check_query_comment_column;
|
||
|
|
|
||
|
|
SELECT table, name, comment
|
||
|
|
FROM system.columns
|
||
|
|
WHERE table = 'check_query_comment_column'
|
||
|
|
FORMAT PrettyCompactNoEscapes;
|
||
|
|
|
||
|
|
ALTER TABLE check_query_comment_column
|
||
|
|
COMMENT COLUMN first_column 'another first column',
|
||
|
|
COMMENT COLUMN second_column 'another second column',
|
||
|
|
COMMENT COLUMN third_column 'another third column',
|
||
|
|
COMMENT COLUMN fourth_column 'another fourth column',
|
||
|
|
COMMENT COLUMN fifth_column 'another fifth column';
|
||
|
|
|
||
|
|
SHOW CREATE TABLE check_query_comment_column;
|
||
|
|
|
||
|
|
SELECT table, name, comment
|
||
|
|
FROM system.columns
|
||
|
|
WHERE table = 'check_query_comment_column'
|
||
|
|
FORMAT PrettyCompactNoEscapes;
|
||
|
|
|
||
|
|
DROP TABLE IF EXISTS check_query_comment_column;
|
||
|
|
|
||
|
|
|
||
|
|
CREATE TABLE check_query_comment_column
|
||
|
|
(
|
||
|
|
first_column Date COMMENT 'first comment',
|
||
|
|
second_column UInt8 COMMENT 'second comment',
|
||
|
|
third_column UInt8 COMMENT 'third comment'
|
||
|
|
) ENGINE = MergeTree(first_column, (second_column, second_column), 8192);
|
||
|
|
|
||
|
|
SHOW CREATE TABLE check_query_comment_column;
|
||
|
|
|
||
|
|
SELECT table, name, comment
|
||
|
|
FROM system.columns
|
||
|
|
WHERE table = 'check_query_comment_column'
|
||
|
|
FORMAT PrettyCompactNoEscapes;
|
||
|
|
|
||
|
|
ALTER TABLE check_query_comment_column
|
||
|
|
COMMENT COLUMN first_column 'another first comment',
|
||
|
|
COMMENT COLUMN second_column 'another second comment',
|
||
|
|
COMMENT COLUMN third_column 'another third comment';
|
||
|
|
|
||
|
|
SHOW CREATE TABLE check_query_comment_column;
|
||
|
|
|
||
|
|
SELECT table, name, comment
|
||
|
|
FROM system.columns
|
||
|
|
WHERE table = 'check_query_comment_column'
|
||
|
|
FORMAT PrettyCompactNoEscapes;
|