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23 lines
540 B
SQL
23 lines
540 B
SQL
DROP TABLE IF EXISTS test;
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CREATE TABLE test
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(
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dt Date,
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id Int32,
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key String,
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data Nullable(Int8)
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) ENGINE = MergeTree(dt, (id, key, dt), 8192);
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INSERT INTO test (dt,id, key,data) VALUES ('2000-01-01', 100, 'key', 100500);
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alter table test drop column data;
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alter table test add column data Nullable(Float64);
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INSERT INTO test (dt,id, key,data) VALUES ('2000-01-01', 100, 'key', 100500);
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SELECT * FROM test ORDER BY data NULLS FIRST;
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OPTIMIZE TABLE test;
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SELECT * FROM test ORDER BY data NULLS FIRST;
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DROP TABLE test;
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