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46 lines
1.8 KiB
MySQL
46 lines
1.8 KiB
MySQL
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-- https://github.com/ClickHouse/ClickHouse/issues/30231
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SELECT *
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FROM (
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SELECT number,
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multiIf(
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CAST(number < 4, 'UInt8'), toString(number),
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CAST(number < 8, 'LowCardinality(UInt8)'), toString(number * 10),
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CAST(number < 12, 'Nullable(UInt8)'), toString(number * 100),
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CAST(number < 16, 'LowCardinality(Nullable(UInt8))'), toString(number * 1000),
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toString(number * 10000)) as m
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FROM system.numbers
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LIMIT 20
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)
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ORDER BY number
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SETTINGS short_circuit_function_evaluation='enable';
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SELECT *
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FROM (
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SELECT number,
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multiIf(
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CAST(number < 4, 'UInt8'), toString(number),
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CAST(number < 8, 'LowCardinality(UInt8)'), toString(number * 10),
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CAST(NULL, 'Nullable(UInt8)'), toString(number * 100),
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CAST(NULL, 'LowCardinality(Nullable(UInt8))'), toString(number * 1000),
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toString(number * 10000)) as m
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FROM system.numbers
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LIMIT 20
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)
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ORDER BY number
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SETTINGS short_circuit_function_evaluation='enable';
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SELECT *
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FROM (
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SELECT number,
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multiIf(
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CAST(number < 4, 'UInt8'), toString(number),
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CAST(number < 8, 'LowCardinality(UInt8)'), toString(number * 10)::LowCardinality(String),
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CAST(number < 12, 'Nullable(UInt8)'), toString(number * 100)::Nullable(String),
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CAST(number < 16, 'LowCardinality(Nullable(UInt8))'), toString(number * 1000)::LowCardinality(Nullable(String)),
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toString(number * 10000)) as m
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FROM system.numbers
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LIMIT 20
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)
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ORDER BY number
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SETTINGS short_circuit_function_evaluation='enable';
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