ClickHouse/dbms/include/DB/Functions/Conditional/ArgsInfo.h

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2016-04-18 14:31:32 +00:00
#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 all the branches (then, else) have numeric types.
bool hasArithmeticBranches(const DataTypes & args);
/// Returns true if all the branches (then, else) are arrays.
bool hasArrayBranches(const DataTypes & args);
/// Returns true if all the branches (then, else) have the same type name.
bool hasIdenticalTypes(const DataTypes & args);
/// Returns true if all the branches (then, else) are fixed strings.
bool hasFixedStrings(const DataTypes & args);
/// Returns true if all the branches (then, else) are fixed strings of equal length.
bool hasFixedStringsOfIdenticalLength(const DataTypes & args);
/// Returns true if all the branches (then, else) are strings.
bool hasStrings(const DataTypes & args);
}
}