1#pragma once
2
3#include <DataTypes/IDataType.h>
4
5
6namespace DB
7{
8
9/** Get data type that covers intersection of all possible values of passed data types.
10 * DataTypeNothing is the most common subtype for all types.
11 * Examples: most common subtype for UInt16, UInt8 and Int8 - UInt16.
12 * Examples: most common subtype for Array(UInt8), Int8 is Nothing
13 *
14 * If force_support_conversion is true, returns type which may be used to convert each argument to.
15 * Example: most common subtype for Array(UInt8) and Array(Nullable(Int32)) is Array(Nullable(UInt8) if force_support_conversion is true.
16 */
17DataTypePtr getMostSubtype(const DataTypes & types, bool throw_if_result_is_nothing = false, bool force_support_conversion = false);
18
19}
20