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20 lines
739 B
C++
20 lines
739 B
C++
#pragma once
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#include <DataTypes/IDataType.h>
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namespace DB
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{
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/** Get data type that covers intersection of all possible values of passed data types.
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* DataTypeNothing is the most common subtype for all types.
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* Examples: most common subtype for UInt16, UInt8 and Int8 - UInt16.
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* Examples: most common subtype for Array(UInt8), Int8 is Nothing
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*
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* If force_support_conversion is true, returns type which may be used to convert each argument to.
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* Example: most common subtype for Array(UInt8) and Array(Nullable(Int32)) is Array(Nullable(UInt8) if force_support_conversion is true.
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*/
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DataTypePtr getMostSubtype(const DataTypes & types, bool throw_if_result_is_nothing = false, bool force_support_conversion = false);
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}
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