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54 lines
2.0 KiB
SQL
54 lines
2.0 KiB
SQL
DROP TABLE IF EXISTS sparse_tuple;
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CREATE TABLE sparse_tuple (id UInt64, t Tuple(a UInt64, s String))
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ENGINE = MergeTree ORDER BY tuple()
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SETTINGS ratio_of_defaults_for_sparse_serialization = 0.5;
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INSERT INTO sparse_tuple SELECT number, (if (number % 20 = 0, number, 0), repeat('a', number % 10 + 1)) FROM numbers(1000);
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SELECT column, subcolumns.names, subcolumns.types, subcolumns.serializations
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FROM system.parts_columns
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WHERE table = 'sparse_tuple' AND database = currentDatabase()
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ORDER BY column;
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SELECT t FROM sparse_tuple ORDER BY id LIMIT 5;
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SELECT t FROM sparse_tuple WHERE t.a != 0 ORDER BY id LIMIT 5;
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SELECT t FROM sparse_tuple WHERE t.a != 0 ORDER BY t.a LIMIT 5;
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SELECT t.a FROM sparse_tuple ORDER BY id LIMIT 5;
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SELECT t.a FROM sparse_tuple WHERE t.a != 0 ORDER BY id LIMIT 5;
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SELECT t.a FROM sparse_tuple WHERE t.a != 0 ORDER BY t.a LIMIT 5;
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SELECT t.s FROM sparse_tuple ORDER BY id LIMIT 5;
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SELECT t.s FROM sparse_tuple WHERE t.a != 0 ORDER BY id LIMIT 5;
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DROP TABLE IF EXISTS sparse_tuple;
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CREATE TABLE sparse_tuple (id UInt64, t Tuple(a UInt64, b Tuple(u UInt32, s String)))
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ENGINE = MergeTree ORDER BY tuple()
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SETTINGS ratio_of_defaults_for_sparse_serialization = 0.5;
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INSERT INTO sparse_tuple SELECT number, (if (number % 20 = 0, number, 0), (if (number % 15 = 0, number, 0), repeat('a', number % 10 + 1))) FROM numbers(1000);
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SELECT column, subcolumns.names, subcolumns.types, subcolumns.serializations
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FROM system.parts_columns
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WHERE table = 'sparse_tuple' AND database = currentDatabase()
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ORDER BY column;
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SELECT t.a FROM sparse_tuple WHERE t.b.u != 0 ORDER BY id LIMIT 5;
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SELECT t.b.s FROM sparse_tuple ORDER BY id LIMIT 5;
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SELECT t.b.s FROM sparse_tuple WHERE t.b.u != 0 ORDER BY id LIMIT 5;
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DETACH TABLE sparse_tuple;
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ATTACH TABLE sparse_tuple;
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SELECT column, subcolumns.names, subcolumns.types, subcolumns.serializations
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FROM system.parts_columns
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WHERE table = 'sparse_tuple' AND database = currentDatabase()
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ORDER BY column;
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SELECT t.b.s FROM sparse_tuple WHERE t.b.u != 0 ORDER BY id LIMIT 5;
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DROP TABLE IF EXISTS sparse_tuple;
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