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22 lines
882 B
SQL
22 lines
882 B
SQL
SET mutations_sync = 2;
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DROP TABLE IF EXISTS t_sparse_mutations_5;
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CREATE TABLE t_sparse_mutations_5 (k UInt64, t Tuple(UInt64, 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_5 SELECT number, (0, 0) FROM numbers(10000);
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SELECT type, serialization_kind, subcolumns.names, subcolumns.types, subcolumns.serializations FROM system.parts_columns
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WHERE database = currentDatabase() AND table = 't_sparse_mutations_5' AND column = 't' AND active
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ORDER BY name;
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ALTER TABLE t_sparse_mutations_5 MODIFY COLUMN t Tuple(UInt64, String);
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SELECT type, serialization_kind, subcolumns.names, subcolumns.types, subcolumns.serializations FROM system.parts_columns
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WHERE database = currentDatabase() AND table = 't_sparse_mutations_5' AND column = 't' AND active
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ORDER BY name;
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DROP TABLE t_sparse_mutations_5;
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