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22 lines
721 B
MySQL
22 lines
721 B
MySQL
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SET mutations_sync = 2;
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DROP TABLE IF EXISTS t_sparse_mutations_4;
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CREATE TABLE t_sparse_mutations_4 (k UInt64, v UInt64)
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ENGINE = MergeTree ORDER BY k
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SETTINGS ratio_of_defaults_for_sparse_serialization = 0.9;
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INSERT INTO t_sparse_mutations_4 SELECT number, 0 FROM numbers(10000);
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SELECT type, serialization_kind FROM system.parts_columns
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WHERE database = currentDatabase() AND table = 't_sparse_mutations_4' AND column = 'v' AND active
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ORDER BY name;
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ALTER TABLE t_sparse_mutations_4 MODIFY COLUMN v String;
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SELECT type, serialization_kind FROM system.parts_columns
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WHERE database = currentDatabase() AND table = 't_sparse_mutations_4' AND column = 'v' AND active
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ORDER BY name;
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DROP TABLE t_sparse_mutations_4;
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