1#pragma once
2
3#include <Core/Field.h>
4
5
6namespace DB
7{
8
9class IDataType;
10
11/** Used to interpret expressions in a set in IN,
12 * and also in the query of the form INSERT ... VALUES ...
13 *
14 * To work correctly with expressions of the form `1.0 IN (1)` or, for example, `1 IN (1, 2.0, 2.5, -1)` work the same way as `1 IN (1, 2)`.
15 * Checks for the compatibility of types, checks values fall in the range of valid values of the type, makes type conversion.
16 * If the value does not fall into the range - returns Null.
17 */
18Field convertFieldToType(const Field & from_value, const IDataType & to_type, const IDataType * from_type_hint = nullptr);
19
20}
21