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