mirror of
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23 lines
640 B
MySQL
23 lines
640 B
MySQL
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DROP TABLE IF EXISTS t_update_empty_nested;
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CREATE TABLE t_update_empty_nested
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(
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`id` UInt32,
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`nested.arr1` Array(UInt64),
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)
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ENGINE = MergeTree
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ORDER BY id
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SETTINGS min_bytes_for_wide_part = 0;
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SET mutations_sync = 2;
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INSERT INTO t_update_empty_nested SELECT 1, range(number % 10) FROM numbers(100000);
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ALTER TABLE t_update_empty_nested ADD COLUMN `nested.arr2` Array(UInt64);
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ALTER TABLE t_update_empty_nested UPDATE `nested.arr2` = `nested.arr1` WHERE 1;
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SELECT * FROM t_update_empty_nested FORMAT Null;
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SELECT sum(length(nested.arr1)), sum(length(nested.arr2)) FROM t_update_empty_nested;
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DROP TABLE t_update_empty_nested;
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