mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-30 13:40:50 +00:00
42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
#pragma once
|
|
|
|
#include <DB/DataTypes/IDataType.h>
|
|
|
|
namespace DB
|
|
{
|
|
|
|
namespace Conditional
|
|
{
|
|
|
|
/// Determine the return type of the function multiIf when all the
|
|
/// branches (then, else) have numeric types.
|
|
DataTypePtr getReturnTypeForArithmeticArgs(const DataTypes & args);
|
|
|
|
/// Returns true if either all the branches are null or
|
|
/// all the non-null branches (then, else) have numeric types.
|
|
bool hasArithmeticBranches(const DataTypes & args);
|
|
|
|
/// Returns true if either all the branches are null or
|
|
/// all the non-null branches (then, else) are arrays.
|
|
bool hasArrayBranches(const DataTypes & args);
|
|
|
|
/// Returns true if either all the branches are null or
|
|
/// all the non-null branches (then, else) have the same type name.
|
|
bool hasIdenticalTypes(const DataTypes & args);
|
|
|
|
/// Returns true if either all the branches are null or
|
|
/// all the non-null branches (then, else) are fixed strings.
|
|
bool hasFixedStrings(const DataTypes & args);
|
|
|
|
/// Returns true if either all the branches are null or
|
|
/// all the non-null branches (then, else) are fixed strings of equal length.
|
|
bool hasFixedStringsOfIdenticalLength(const DataTypes & args);
|
|
|
|
/// Returns true if either all the branches are null or
|
|
/// all the non-null branches (then, else) are strings.
|
|
bool hasStrings(const DataTypes & args);
|
|
|
|
}
|
|
|
|
}
|