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38 lines
1.5 KiB
SQL
38 lines
1.5 KiB
SQL
DROP TABLE IF EXISTS alter_test;
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CREATE TABLE alter_test (CounterID UInt32, StartDate Date, UserID UInt32, VisitID UInt32, NestedColumn Nested(A UInt8, S String), ToDrop UInt32) ENGINE = MergeTree(StartDate, intHash32(UserID), (CounterID, StartDate, intHash32(UserID), VisitID), 8192);
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INSERT INTO alter_test VALUES (1, '2014-01-01', 2, 3, [1,2,3], ['a','b','c'], 4);
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ALTER TABLE alter_test ADD COLUMN Added0 UInt32;
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ALTER TABLE alter_test ADD COLUMN Added2 UInt32;
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ALTER TABLE alter_test ADD COLUMN Added1 UInt32 AFTER Added0;
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ALTER TABLE alter_test ADD COLUMN AddedNested1 Nested(A UInt32, B UInt64) AFTER Added2;
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ALTER TABLE alter_test ADD COLUMN AddedNested1.C Array(String) AFTER AddedNested1.B;
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ALTER TABLE alter_test ADD COLUMN AddedNested2 Nested(A UInt32, B UInt64) AFTER AddedNested1;
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DESC TABLE alter_test;
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ALTER TABLE alter_test DROP COLUMN ToDrop;
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ALTER TABLE alter_test MODIFY COLUMN Added0 String;
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ALTER TABLE alter_test DROP COLUMN NestedColumn.A;
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ALTER TABLE alter_test DROP COLUMN NestedColumn.S;
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ALTER TABLE alter_test DROP COLUMN AddedNested1.B;
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ALTER TABLE alter_test ADD COLUMN IF NOT EXISTS Added0 UInt32;
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ALTER TABLE alter_test ADD COLUMN IF NOT EXISTS AddedNested1 Nested(A UInt32, B UInt64);
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ALTER TABLE alter_test ADD COLUMN IF NOT EXISTS AddedNested1.C Array(String);
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ALTER TABLE alter_test MODIFY COLUMN IF EXISTS ToDrop UInt64;
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ALTER TABLE alter_test DROP COLUMN IF EXISTS ToDrop;
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ALTER TABLE alter_test COMMENT COLUMN IF EXISTS ToDrop 'new comment';
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DESC TABLE alter_test;
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SELECT * FROM alter_test;
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DROP TABLE alter_test;
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