mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-13 18:02:24 +00:00
70d1adfe4b
* save format string for NetException * format exceptions * format exceptions 2 * format exceptions 3 * format exceptions 4 * format exceptions 5 * format exceptions 6 * fix * format exceptions 7 * format exceptions 8 * Update MergeTreeIndexGin.cpp * Update AggregateFunctionMap.cpp * Update AggregateFunctionMap.cpp * fix
71 lines
2.1 KiB
C++
71 lines
2.1 KiB
C++
#include <Functions/FunctionFactory.h>
|
|
#include <Functions/FunctionUnaryArithmetic.h>
|
|
#include <DataTypes/NumberTraits.h>
|
|
|
|
namespace DB
|
|
{
|
|
namespace ErrorCodes
|
|
{
|
|
extern const int LOGICAL_ERROR;
|
|
extern const int BAD_ARGUMENTS;
|
|
}
|
|
|
|
namespace
|
|
{
|
|
|
|
/// Working with UInt8: last bit = can be true, previous = can be false (Like src/Storages/MergeTree/BoolMask.h).
|
|
/// This function provides "NOT" operation for BoolMasks by swapping last two bits ("can be true" <-> "can be false").
|
|
template <typename A>
|
|
struct BitSwapLastTwoImpl
|
|
{
|
|
using ResultType = UInt8;
|
|
static constexpr const bool allow_fixed_string = false;
|
|
static const constexpr bool allow_string_integer = false;
|
|
|
|
static inline ResultType NO_SANITIZE_UNDEFINED apply([[maybe_unused]] A a)
|
|
{
|
|
if constexpr (!std::is_same_v<A, ResultType>)
|
|
// Should be a logical error, but this function is callable from SQL.
|
|
// Need to investigate this.
|
|
throw DB::Exception(ErrorCodes::BAD_ARGUMENTS, "It's a bug! Only UInt8 type is supported by __bitSwapLastTwo.");
|
|
|
|
auto little_bits = littleBits<A>(a);
|
|
return static_cast<ResultType>(((little_bits & 1) << 1) | ((little_bits >> 1) & 1));
|
|
}
|
|
|
|
#if USE_EMBEDDED_COMPILER
|
|
static constexpr bool compilable = true;
|
|
|
|
static inline llvm::Value * compile(llvm::IRBuilder<> & b, llvm::Value * arg, bool)
|
|
{
|
|
if (!arg->getType()->isIntegerTy())
|
|
throw Exception(ErrorCodes::LOGICAL_ERROR, "__bitSwapLastTwo expected an integral type");
|
|
return b.CreateOr(
|
|
b.CreateShl(b.CreateAnd(arg, 1), 1),
|
|
b.CreateAnd(b.CreateLShr(arg, 1), 1)
|
|
);
|
|
}
|
|
#endif
|
|
};
|
|
|
|
struct NameBitSwapLastTwo { static constexpr auto name = "__bitSwapLastTwo"; };
|
|
using FunctionBitSwapLastTwo = FunctionUnaryArithmetic<BitSwapLastTwoImpl, NameBitSwapLastTwo, true>;
|
|
|
|
}
|
|
|
|
template <> struct FunctionUnaryArithmeticMonotonicity<NameBitSwapLastTwo>
|
|
{
|
|
static bool has() { return false; }
|
|
static IFunction::Monotonicity get(const Field &, const Field &)
|
|
{
|
|
return {};
|
|
}
|
|
};
|
|
|
|
REGISTER_FUNCTION(BitSwapLastTwo)
|
|
{
|
|
factory.registerFunction<FunctionBitSwapLastTwo>();
|
|
}
|
|
|
|
}
|