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91 lines
3.1 KiB
SQL
91 lines
3.1 KiB
SQL
DROP TABLE IF EXISTS check_query_comment_column;
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-- Check COMMENT COLUMN and MODIFY COLUMN statements with simple engine
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CREATE TABLE check_query_comment_column
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(
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first_column UInt8 DEFAULT 1 COMMENT 'comment 1',
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second_column UInt8 MATERIALIZED first_column COMMENT 'comment 2',
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third_column UInt8 ALIAS second_column COMMENT 'comment 3',
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fourth_column UInt8 COMMENT 'comment 4',
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fifth_column UInt8
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) ENGINE = TinyLog;
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SHOW CREATE TABLE check_query_comment_column;
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DESCRIBE TABLE check_query_comment_column;
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SELECT table, name, comment
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FROM system.columns
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WHERE table = 'check_query_comment_column' AND database = currentDatabase()
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FORMAT PrettyCompactNoEscapes;
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ALTER TABLE check_query_comment_column
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COMMENT COLUMN first_column 'comment 1_1',
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COMMENT COLUMN second_column 'comment 2_1',
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COMMENT COLUMN third_column 'comment 3_1',
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COMMENT COLUMN fourth_column 'comment 4_1',
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COMMENT COLUMN fifth_column 'comment 5_1';
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SHOW CREATE TABLE check_query_comment_column;
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ALTER TABLE check_query_comment_column
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MODIFY COLUMN first_column COMMENT 'comment 1_2',
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MODIFY COLUMN second_column COMMENT 'comment 2_2',
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MODIFY COLUMN third_column COMMENT 'comment 3_2',
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MODIFY COLUMN fourth_column COMMENT 'comment 4_2',
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MODIFY COLUMN fifth_column COMMENT 'comment 5_2';
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SELECT table, name, comment
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FROM system.columns
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WHERE table = 'check_query_comment_column' AND database = currentDatabase()
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FORMAT PrettyCompactNoEscapes;
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SHOW CREATE TABLE check_query_comment_column;
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DROP TABLE IF EXISTS check_query_comment_column;
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-- Check `ALTER TABLE table_name COMMENT COLUMN 'comment'` statement with MergeTree engine
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CREATE TABLE check_query_comment_column
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(
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first_column UInt8 COMMENT 'comment 1',
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second_column UInt8 COMMENT 'comment 2',
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third_column UInt8 COMMENT 'comment 3'
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) ENGINE = MergeTree()
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ORDER BY first_column
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PARTITION BY second_column
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SAMPLE BY first_column;
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SHOW CREATE TABLE check_query_comment_column;
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DESCRIBE TABLE check_query_comment_column;
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SELECT table, name, comment
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FROM system.columns
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WHERE table = 'check_query_comment_column' AND database = currentDatabase()
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FORMAT PrettyCompactNoEscapes;
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ALTER TABLE check_query_comment_column
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COMMENT COLUMN first_column 'comment 1_2',
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COMMENT COLUMN second_column 'comment 2_2',
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COMMENT COLUMN third_column 'comment 3_2';
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SHOW CREATE TABLE check_query_comment_column;
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ALTER TABLE check_query_comment_column
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MODIFY COLUMN first_column COMMENT 'comment 1_3',
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MODIFY COLUMN second_column COMMENT 'comment 2_3',
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MODIFY COLUMN third_column COMMENT 'comment 3_3';
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SHOW CREATE TABLE check_query_comment_column;
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ALTER TABLE check_query_comment_column
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MODIFY COLUMN first_column DEFAULT 1 COMMENT 'comment 1_3',
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MODIFY COLUMN second_column COMMENT 'comment 2_3', -- We can't change default value of partition key.
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MODIFY COLUMN third_column DEFAULT 1 COMMENT 'comment 3_3';
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SELECT table, name, comment
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FROM system.columns
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WHERE table = 'check_query_comment_column' and database = currentDatabase()
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FORMAT PrettyCompactNoEscapes;
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DROP TABLE IF EXISTS check_query_comment_column;
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-- TODO: add here tests with ReplicatedMergeTree
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