mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-17 03:42:48 +00:00
86 lines
2.7 KiB
SQL
86 lines
2.7 KiB
SQL
SET mutations_sync = 2;
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DROP TABLE IF EXISTS t_sparse_mutations_3;
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CREATE TABLE t_sparse_mutations_3 (key UInt8, id UInt64, s String)
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ENGINE = MergeTree ORDER BY id PARTITION BY key
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SETTINGS ratio_of_defaults_for_sparse_serialization = 0.9;
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INSERT INTO t_sparse_mutations_3 SELECT 1, number, toString(tuple(1, 0, '1', '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_3' AND column = 's' AND active
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ORDER BY name;
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ALTER TABLE t_sparse_mutations_3 MODIFY COLUMN s Tuple(UInt64, UInt64, String, String, String);
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SELECT
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type,
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serialization_kind,
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subcolumns.names,
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subcolumns.types,
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subcolumns.serializations
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FROM system.parts_columns
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WHERE database = currentDatabase() AND table = 't_sparse_mutations_3' AND column = 's' AND active
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ORDER BY name;
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SELECT sum(s.1), sum(s.2), groupUniqArray(s.3), groupUniqArray(s.4), groupUniqArray(s.5) FROM t_sparse_mutations_3;
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OPTIMIZE TABLE t_sparse_mutations_3 FINAL;
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SELECT
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type,
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serialization_kind,
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subcolumns.names,
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subcolumns.types,
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subcolumns.serializations
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FROM system.parts_columns
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WHERE database = currentDatabase() AND table = 't_sparse_mutations_3' AND column = 's' AND active
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ORDER BY name;
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SELECT sum(s.1), sum(s.2), groupUniqArray(s.3), groupUniqArray(s.4), groupUniqArray(s.5) FROM t_sparse_mutations_3;
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ALTER TABLE t_sparse_mutations_3 MODIFY COLUMN s Tuple(UInt64, UInt64, UInt64, UInt64, String);
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SELECT
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type,
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serialization_kind,
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subcolumns.names,
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subcolumns.types,
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subcolumns.serializations
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FROM system.parts_columns
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WHERE database = currentDatabase() AND table = 't_sparse_mutations_3' AND column = 's' AND active
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ORDER BY name;
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SELECT sum(s.1), sum(s.2), sum(s.3), sum(s.4), groupUniqArray(s.5) FROM t_sparse_mutations_3;
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OPTIMIZE TABLE t_sparse_mutations_3 FINAL;
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SELECT
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type,
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serialization_kind,
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subcolumns.names,
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subcolumns.types,
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subcolumns.serializations
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FROM system.parts_columns
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WHERE database = currentDatabase() AND table = 't_sparse_mutations_3' AND column = 's' AND active
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ORDER BY name;
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SELECT sum(s.1), sum(s.2), sum(s.3), sum(s.4), groupUniqArray(s.5) FROM t_sparse_mutations_3;
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ALTER TABLE t_sparse_mutations_3 MODIFY COLUMN s Tuple(Nullable(UInt64), Nullable(UInt64), Nullable(UInt64), Nullable(UInt64), Nullable(String));
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SELECT
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type,
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serialization_kind,
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subcolumns.names,
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subcolumns.types,
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subcolumns.serializations
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FROM system.parts_columns
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WHERE database = currentDatabase() AND table = 't_sparse_mutations_3' AND column = 's' AND active
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ORDER BY name;
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SELECT sum(s.1), sum(s.2), sum(s.3), sum(s.4), groupUniqArray(s.5) FROM t_sparse_mutations_3;
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DROP TABLE t_sparse_mutations_3;
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