| /** |
| * Copyright 2011-2015 Quickstep Technologies LLC. |
| * Copyright 2015 Pivotal Software, Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| **/ |
| |
| #ifndef QUICKSTEP_STORAGE_BASIC_COLUMN_STORE_VALUE_ACCESSOR_HPP_ |
| #define QUICKSTEP_STORAGE_BASIC_COLUMN_STORE_VALUE_ACCESSOR_HPP_ |
| |
| #include <vector> |
| |
| #include "catalog/CatalogRelationSchema.hpp" |
| #include "catalog/CatalogTypedefs.hpp" |
| #include "storage/StorageBlockInfo.hpp" |
| #include "storage/ValueAccessor.hpp" |
| #include "types/Type.hpp" |
| #include "types/TypedValue.hpp" |
| #include "utility/BitVector.hpp" |
| #include "utility/Macros.hpp" |
| #include "utility/PtrVector.hpp" |
| |
| namespace quickstep { |
| |
| class BasicColumnStoreTupleStorageSubBlock; |
| |
| class BasicColumnStoreValueAccessorHelper { |
| public: |
| BasicColumnStoreValueAccessorHelper(const CatalogRelationSchema &relation, |
| const tuple_id num_tuples, |
| const std::vector<void*> &column_stripes, |
| const PtrVector<BitVector<false>, true> &column_null_bitmaps) |
| : relation_(relation), |
| num_tuples_(num_tuples), |
| column_stripes_(column_stripes), |
| column_null_bitmaps_(column_null_bitmaps) { |
| } |
| |
| inline tuple_id numPackedTuples() const { |
| return num_tuples_; |
| } |
| |
| template <bool check_null> |
| inline const void* getAttributeValue(const tuple_id tuple, |
| const attribute_id attr) const { |
| DEBUG_ASSERT(tuple < num_tuples_); |
| DEBUG_ASSERT(relation_.hasAttributeWithId(attr)); |
| if (check_null |
| && (!column_null_bitmaps_.elementIsNull(attr)) |
| && column_null_bitmaps_[attr].getBit(tuple)) { |
| return nullptr; |
| } |
| |
| // TODO(chasseur): Consider cacheing the byte lengths of attributes. |
| return static_cast<const char*>(column_stripes_[attr]) |
| + (tuple * relation_.getAttributeById(attr)->getType().maximumByteLength()); |
| } |
| |
| inline TypedValue getAttributeValueTyped(const tuple_id tuple, |
| const attribute_id attr) const { |
| const Type &attr_type = relation_.getAttributeById(attr)->getType(); |
| const void *untyped_value = getAttributeValue<true>(tuple, attr); |
| return (untyped_value == nullptr) |
| ? attr_type.makeNullValue() |
| : attr_type.makeValue(untyped_value, attr_type.maximumByteLength()); |
| } |
| |
| private: |
| const CatalogRelationSchema &relation_; |
| const tuple_id num_tuples_; |
| const std::vector<void*> &column_stripes_; |
| const PtrVector<BitVector<false>, true> &column_null_bitmaps_; |
| |
| DISALLOW_COPY_AND_ASSIGN(BasicColumnStoreValueAccessorHelper); |
| }; |
| |
| typedef PackedTupleStorageSubBlockValueAccessor< |
| BasicColumnStoreTupleStorageSubBlock, |
| BasicColumnStoreValueAccessorHelper, |
| ValueAccessor::Implementation::kBasicColumnStore> |
| BasicColumnStoreValueAccessor; |
| |
| } // namespace quickstep |
| |
| #endif // QUICKSTEP_STORAGE_BASIC_COLUMN_STORE_VALUE_ACCESSOR_HPP_ |