| /** |
| * 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_PACKED_ROW_STORE_VALUE_ACCESSOR_HPP_ |
| #define QUICKSTEP_STORAGE_PACKED_ROW_STORE_VALUE_ACCESSOR_HPP_ |
| |
| #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" |
| |
| namespace quickstep { |
| |
| class PackedRowStoreTupleStorageSubBlock; |
| |
| class PackedRowStoreValueAccessorHelper { |
| public: |
| PackedRowStoreValueAccessorHelper(const CatalogRelationSchema &relation, |
| const tuple_id num_tuples, |
| const void *tuple_storage, |
| const BitVector<false> *null_bitmap) |
| : relation_(relation), |
| num_tuples_(num_tuples), |
| tuple_storage_(tuple_storage), |
| null_bitmap_(null_bitmap) { |
| } |
| |
| 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) { |
| const int nullable_idx = relation_.getNullableAttributeIndex(attr); |
| if ((nullable_idx != -1) |
| && null_bitmap_->getBit(tuple * relation_.numNullableAttributes() + nullable_idx)) { |
| return nullptr; |
| } |
| } |
| |
| return static_cast<const char*>(tuple_storage_) // Start of actual tuple storage. |
| + (tuple * relation_.getFixedByteLength()) // Tuples prior to 'tuple'. |
| + relation_.getFixedLengthAttributeOffset(attr); // Attribute offset within tuple. |
| } |
| |
| 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 void *tuple_storage_; |
| const BitVector<false> *null_bitmap_; |
| |
| DISALLOW_COPY_AND_ASSIGN(PackedRowStoreValueAccessorHelper); |
| }; |
| |
| typedef PackedTupleStorageSubBlockValueAccessor< |
| PackedRowStoreTupleStorageSubBlock, |
| PackedRowStoreValueAccessorHelper, |
| ValueAccessor::Implementation::kPackedRowStore> |
| PackedRowStoreValueAccessor; |
| |
| } // namespace quickstep |
| |
| #endif // QUICKSTEP_STORAGE_PACKED_ROW_STORE_VALUE_ACCESSOR_HPP_ |