ClickHouse/dbms/src/Functions/version.cpp
Amos Bird 3cf2177268 Flexible fields assignment
Field f;

before:

f = Int64(-42);

after:

f = -42;
2018-10-24 08:47:33 +08:00

49 lines
1.1 KiB
C++

#include <Functions/IFunction.h>
#include <Functions/FunctionFactory.h>
#include <DataTypes/DataTypeString.h>
#include <Common/config_version.h>
namespace DB
{
/** version() - returns the current version as a string.
*/
class FunctionVersion : public IFunction
{
public:
static constexpr auto name = "version";
static FunctionPtr create(const Context &)
{
return std::make_shared<FunctionVersion>();
}
String getName() const override
{
return name;
}
size_t getNumberOfArguments() const override
{
return 0;
}
DataTypePtr getReturnTypeImpl(const DataTypes & /*arguments*/) const override
{
return std::make_shared<DataTypeString>();
}
void executeImpl(Block & block, const ColumnNumbers &, size_t result, size_t input_rows_count) override
{
block.getByPosition(result).column = DataTypeString().createColumnConst(input_rows_count, VERSION_STRING);
}
};
void registerFunctionVersion(FunctionFactory & factory)
{
factory.registerFunction<FunctionVersion>();
}
}