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31 lines
865 B
SQL
31 lines
865 B
SQL
DROP TABLE IF EXISTS table_with_column_ttl;
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CREATE TABLE table_with_column_ttl
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(
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EventTime DateTime,
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UserID UInt64,
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Age UInt8 TTL EventTime + INTERVAL 3 MONTH
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)
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ENGINE MergeTree()
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ORDER BY tuple()
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SETTINGS min_bytes_for_wide_part = 0; -- column TTL doesn't work for compact parts
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INSERT INTO table_with_column_ttl VALUES (now(), 1, 32);
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INSERT INTO table_with_column_ttl VALUES (now() - INTERVAL 4 MONTH, 2, 45);
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OPTIMIZE TABLE table_with_column_ttl FINAL;
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SELECT UserID, Age FROM table_with_column_ttl ORDER BY UserID;
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ALTER TABLE table_with_column_ttl MODIFY COLUMN Age REMOVE TTL;
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SHOW CREATE TABLE table_with_column_ttl;
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INSERT INTO table_with_column_ttl VALUES (now() - INTERVAL 10 MONTH, 3, 27);
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OPTIMIZE TABLE table_with_column_ttl FINAL;
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SELECT UserID, Age FROM table_with_column_ttl ORDER BY UserID;
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DROP TABLE table_with_column_ttl;
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