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#include "mkql_block_coalesce.h"
#include <yql/essentials/minikql/arrow/arrow_defs.h>
#include <yql/essentials/minikql/mkql_type_builder.h>
#include <yql/essentials/minikql/computation/mkql_block_impl.h>
#include <yql/essentials/minikql/computation/mkql_computation_node_holders.h>
#include <yql/essentials/minikql/mkql_node_builder.h>
#include <yql/essentials/minikql/mkql_node_cast.h>
#include <yql/essentials/minikql/mkql_type_helper.h>
#include <yql/essentials/public/udf/arrow/block_builder.h>
#include <yql/essentials/public/udf/arrow/block_reader.h>
#include <yql/essentials/public/udf/arrow/util.h>
#include <yql/essentials/minikql/comp_nodes/mkql_block_coalesce_blending_helper.h>
#include <yql/essentials/minikql/defs.h>
#include <arrow/util/bitmap_ops.h>
namespace NKikimr::NMiniKQL {
namespace {
template <typename TType>
void DispatchCoalesceImpl(const arrow::Datum& left, const arrow::Datum& right, arrow::Datum& out, arrow::MemoryPool& pool) {
bool outHasBitmask = (right.is_array() && right.null_count() > 0) || (right.is_scalar() && !right.scalar()->is_valid);
auto bitmap = outHasBitmask ? ARROW_RESULT(arrow::AllocateBitmap((left.array()->length + left.array()->offset % 8) * sizeof(ui8), &pool)) : nullptr;
if (bitmap && bitmap->size() > 0) {
// Fill first byte with zero to prevent further uninitialized memory access.
bitmap->mutable_data()[0] = 0;
}
out = arrow::ArrayData::Make(right.type(), left.array()->length,
{std::move(bitmap),
ARROW_RESULT(arrow::AllocateBuffer((left.array()->length + left.array()->offset % 8) * sizeof(TType), &pool))},
arrow::kUnknownNullCount, left.array()->offset % 8);
if (outHasBitmask) {
if (right.is_scalar()) {
out = left;
} else {
MKQL_ENSURE(TDatumStorageView<TType>(right).bitMask(), "Right array must have a null mask");
BlendCoalesce<TType, /*isScalar=*/false, /*rightHasBitmask=*/true>(
TDatumStorageView<TType>(left),
TDatumStorageView<TType>(right),
TDatumStorageView<TType>(out),
left.array()->length);
}
} else {
if (right.is_scalar()) {
BlendCoalesce<TType, /*isScalar=*/true, /*rightHasBitmask=*/false>(
TDatumStorageView<TType>(left),
TDatumStorageView<TType>(right),
TDatumStorageView<TType>(out),
left.array()->length);
} else {
BlendCoalesce<TType, /*isScalar=*/false, /*rightHasBitmask=*/false>(
TDatumStorageView<TType>(left),
TDatumStorageView<TType>(right),
TDatumStorageView<TType>(out),
left.array()->length);
}
}
}
bool DispatchBlendingCoalesce(const arrow::Datum& left, const arrow::Datum& right, arrow::Datum& out, TType* rightType, bool needUnwrapFirst, arrow::MemoryPool& pool) {
TTypeInfoHelper typeInfoHelper;
if (!needUnwrapFirst) {
bool rightTypeIsOptional;
rightType = UnpackOptional(rightType, rightTypeIsOptional);
MKQL_ENSURE(rightTypeIsOptional || rightType->IsPg(), "Right type must be optional or pg.");
}
NYql::NUdf::TDataTypeInspector typeData(typeInfoHelper, rightType);
if (!typeData) {
return false;
}
auto typeId = typeData.GetTypeId();
switch (NYql::NUdf::GetDataSlot(typeId)) {
case NYql::NUdf::EDataSlot::Bool:
case NYql::NUdf::EDataSlot::Int8:
case NYql::NUdf::EDataSlot::Uint8:
DispatchCoalesceImpl<ui8>(left, right, out, pool);
return true;
case NYql::NUdf::EDataSlot::Int16:
case NYql::NUdf::EDataSlot::Uint16:
case NYql::NUdf::EDataSlot::Date:
DispatchCoalesceImpl<ui16>(left, right, out, pool);
return true;
case NYql::NUdf::EDataSlot::Int32:
case NYql::NUdf::EDataSlot::Uint32:
case NYql::NUdf::EDataSlot::Date32:
case NYql::NUdf::EDataSlot::Datetime:
DispatchCoalesceImpl<ui32>(left, right, out, pool);
return true;
case NYql::NUdf::EDataSlot::Int64:
case NYql::NUdf::EDataSlot::Uint64:
case NYql::NUdf::EDataSlot::Datetime64:
case NYql::NUdf::EDataSlot::Timestamp64:
case NYql::NUdf::EDataSlot::Interval64:
case NYql::NUdf::EDataSlot::Interval:
case NYql::NUdf::EDataSlot::Timestamp:
DispatchCoalesceImpl<ui64>(left, right, out, pool);
return true;
case NYql::NUdf::EDataSlot::Double:
static_assert(sizeof(NUdf::TDataType<double>::TLayout) == sizeof(NUdf::TDataType<ui64>::TLayout));
DispatchCoalesceImpl<ui64>(left, right, out, pool);
return true;
case NYql::NUdf::EDataSlot::Float:
static_assert(sizeof(NUdf::TDataType<float>::TLayout) == sizeof(NUdf::TDataType<ui32>::TLayout));
DispatchCoalesceImpl<ui32>(left, right, out, pool);
return true;
default:
// Fallback to general builder/reader pipeline.
return false;
}
}
std::shared_ptr<arrow::Scalar> UnwrapScalar(std::shared_ptr<arrow::Scalar> scalar, bool firstScalarIsExternalOptional) {
if (firstScalarIsExternalOptional) {
return dynamic_cast<arrow::StructScalar&>(*scalar).value.at(0);
}
return scalar;
}
class TCoalesceBlockExec {
public:
TCoalesceBlockExec(const std::shared_ptr<arrow::DataType>& returnArrowType, TType* firstItemType, TType* secondItemType, bool needUnwrapFirst)
: ReturnArrowType_(returnArrowType)
, FirstItemType_(firstItemType)
, SecondItemType_(secondItemType)
, NeedUnwrapFirst_(needUnwrapFirst)
, FirstScalarIsExternalOptional_(NeedWrapWithExternalOptional(FirstItemType_))
{
}
arrow::Status Exec(arrow::compute::KernelContext* ctx, const arrow::compute::ExecBatch& batch, arrow::Datum* res) const {
const auto& first = batch.values[0];
const auto& second = batch.values[1];
if (first.is_scalar() && second.is_scalar()) {
if (first.scalar()->is_valid) {
*res = NeedUnwrapFirst_ ? UnwrapScalar(first.scalar(), FirstScalarIsExternalOptional_) : first.scalar();
} else {
*res = second.scalar();
}
return arrow::Status::OK();
}
MKQL_ENSURE(!first.is_scalar() || !second.is_scalar(), "Expected at least one array");
size_t length = Max(first.length(), second.length());
auto firstReader = NYql::NUdf::MakeBlockReader(TTypeInfoHelper(), FirstItemType_);
auto secondReader = NYql::NUdf::MakeBlockReader(TTypeInfoHelper(), SecondItemType_);
if (first.is_scalar()) {
auto firstValue = firstReader->GetScalarItem(*first.scalar());
if (firstValue) {
auto builder = NYql::NUdf::MakeArrayBuilder(TTypeInfoHelper(), SecondItemType_, *ctx->memory_pool(), length, /*pgBuilder=*/nullptr);
builder->Add(NeedUnwrapFirst_ ? firstValue.GetOptionalValue() : firstValue, length);
*res = builder->Build(true);
} else {
*res = second;
}
} else if (second.is_scalar()) {
const auto& firstArray = *first.array();
if (firstArray.GetNullCount() == 0) {
*res = NeedUnwrapFirst_ ? Unwrap(firstArray, FirstItemType_) : first;
} else if ((size_t)firstArray.GetNullCount() == length) {
auto builder = NYql::NUdf::MakeArrayBuilder(TTypeInfoHelper(), SecondItemType_, *ctx->memory_pool(), length, nullptr);
auto secondValue = secondReader->GetScalarItem(*second.scalar());
builder->Add(secondValue, length);
*res = builder->Build(true);
} else {
if (DispatchBlendingCoalesce(first, second, *res, SecondItemType_, NeedUnwrapFirst_, *ctx->memory_pool())) {
return arrow::Status::OK();
}
auto builder = NYql::NUdf::MakeArrayBuilder(TTypeInfoHelper(), SecondItemType_, *ctx->memory_pool(), length, nullptr);
auto secondValue = secondReader->GetScalarItem(*second.scalar());
for (size_t i = 0; i < length; ++i) {
auto firstItem = firstReader->GetItem(firstArray, i);
if (firstItem) {
builder->Add(NeedUnwrapFirst_ ? firstItem.GetOptionalValue() : firstItem);
} else {
builder->Add(secondValue);
}
}
*res = builder->Build(true);
}
} else {
const auto& firstArray = *first.array();
const auto& secondArray = *second.array();
if (firstArray.GetNullCount() == 0) {
*res = NeedUnwrapFirst_ ? Unwrap(firstArray, FirstItemType_) : first;
} else if ((size_t)firstArray.GetNullCount() == length) {
*res = second;
} else {
if (DispatchBlendingCoalesce(first, second, *res, SecondItemType_, NeedUnwrapFirst_, *ctx->memory_pool())) {
return arrow::Status::OK();
}
auto builder = NYql::NUdf::MakeArrayBuilder(TTypeInfoHelper(), SecondItemType_, *ctx->memory_pool(), length, nullptr);
for (size_t i = 0; i < length; ++i) {
auto firstItem = firstReader->GetItem(firstArray, i);
if (firstItem) {
builder->Add(NeedUnwrapFirst_ ? firstItem.GetOptionalValue() : firstItem);
} else {
auto secondItem = secondReader->GetItem(secondArray, i);
builder->Add(secondItem);
}
}
*res = builder->Build(true);
}
}
return arrow::Status::OK();
}
private:
const std::shared_ptr<arrow::DataType> ReturnArrowType_;
TType* const FirstItemType_;
TType* const SecondItemType_;
const bool NeedUnwrapFirst_;
const bool FirstScalarIsExternalOptional_;
};
std::shared_ptr<arrow::compute::ScalarKernel> MakeBlockCoalesceKernel(const TVector<TType*>& argTypes, TType* resultType, bool needUnwrapFirst) {
using TExec = TCoalesceBlockExec;
std::shared_ptr<arrow::DataType> returnArrowType;
MKQL_ENSURE(ConvertArrowType(AS_TYPE(TBlockType, resultType)->GetItemType(), returnArrowType), "Unsupported arrow type");
auto exec = std::make_shared<TExec>(
returnArrowType,
AS_TYPE(TBlockType, argTypes[0])->GetItemType(),
AS_TYPE(TBlockType, argTypes[1])->GetItemType(),
needUnwrapFirst);
auto kernel = std::make_shared<arrow::compute::ScalarKernel>(ConvertToInputTypes(argTypes), ConvertToOutputType(resultType),
[exec](arrow::compute::KernelContext* ctx, const arrow::compute::ExecBatch& batch, arrow::Datum* res) {
return exec->Exec(ctx, batch, res);
});
kernel->null_handling = arrow::compute::NullHandling::COMPUTED_NO_PREALLOCATE;
return kernel;
}
} // namespace
IComputationNode* WrapBlockCoalesce(TCallable& callable, const TComputationNodeFactoryContext& ctx) {
MKQL_ENSURE(callable.GetInputsCount() == 2, "Expected 2 args");
auto first = callable.GetInput(0);
auto second = callable.GetInput(1);
auto firstType = AS_TYPE(TBlockType, first.GetStaticType());
auto secondType = AS_TYPE(TBlockType, second.GetStaticType());
auto firstItemType = firstType->GetItemType();
auto secondItemType = secondType->GetItemType();
MKQL_ENSURE(firstItemType->IsOptional() || firstItemType->IsPg(), TStringBuilder() << "Expecting Optional or Pg type as first argument, but got: " << *firstItemType);
bool needUnwrapFirst = false;
if (!firstItemType->IsSameType(*secondItemType)) {
// Here the left operand and right operand are of types T? and T respectively.
// The first operand must be unwrapped to obtain the resulting type.
needUnwrapFirst = true;
bool firstOptional;
firstItemType = UnpackOptional(firstItemType, firstOptional);
MKQL_ENSURE(firstItemType->IsSameType(*secondItemType), "Uncompatible arguemnt types");
}
auto firstCompute = LocateNode(ctx.NodeLocator, callable, 0);
auto secondCompute = LocateNode(ctx.NodeLocator, callable, 1);
TComputationNodePtrVector argsNodes = {firstCompute, secondCompute};
TVector<TType*> argsTypes = {firstType, secondType};
auto kernel = MakeBlockCoalesceKernel(argsTypes, secondType, needUnwrapFirst);
return new TBlockFuncNode(ctx.Mutables, ToDatumValidateMode(ctx.ValidateMode), "Coalesce", std::move(argsNodes), argsTypes, callable.GetType()->GetReturnType(), *kernel, kernel);
}
} // namespace NKikimr::NMiniKQL
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