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14 lines
513 B
SQL
14 lines
513 B
SQL
DROP TABLE IF EXISTS nullable;
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CREATE TABLE nullable (x String) ENGINE = MergeTree ORDER BY x;
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INSERT INTO nullable VALUES ('hello'), ('world');
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SELECT * FROM nullable;
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ALTER TABLE nullable ADD COLUMN n Nullable(UInt64);
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SELECT * FROM nullable;
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ALTER TABLE nullable DROP COLUMN n;
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ALTER TABLE nullable ADD COLUMN n Nullable(UInt64) DEFAULT NULL;
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SELECT * FROM nullable;
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ALTER TABLE nullable DROP COLUMN n;
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ALTER TABLE nullable ADD COLUMN n Nullable(UInt64) DEFAULT 0;
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SELECT * FROM nullable;
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DROP TABLE nullable;
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