| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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_EXPRESSIONS_PREDICATE_COMPARISON_PREDICATE_HPP_ |
| #define QUICKSTEP_EXPRESSIONS_PREDICATE_COMPARISON_PREDICATE_HPP_ |
| |
| #include <memory> |
| #include <utility> |
| |
| #include "catalog/CatalogTypedefs.hpp" |
| #include "expressions/Expressions.pb.h" |
| #include "expressions/predicate/Predicate.hpp" |
| #include "expressions/scalar/Scalar.hpp" |
| #include "storage/StorageBlockInfo.hpp" |
| #include "types/operations/comparisons/Comparison.hpp" |
| #include "utility/Macros.hpp" |
| |
| #include "glog/logging.h" |
| |
| namespace quickstep { |
| |
| class TupleIdSequence; |
| class ValueAccessor; |
| |
| struct SubBlocksReference; |
| |
| /** \addtogroup Expressions |
| * @{ |
| */ |
| |
| /** |
| * @brief A Predicate which is a comparison of two scalar values. |
| **/ |
| class ComparisonPredicate : public Predicate { |
| public: |
| /** |
| * @brief Constructor |
| * |
| * @param Comparison The comparison operation to be performed. |
| * @param left_operand The left argument of the comparison, becomes owned by |
| * this ComparisonPredicate. |
| * @param right_operand The right argument of the comparison, becomes owned |
| * by this ComparisonPredicate. |
| **/ |
| ComparisonPredicate(const Comparison &comparison, |
| Scalar *left_operand, |
| Scalar *right_operand); |
| |
| ~ComparisonPredicate() override { |
| } |
| |
| serialization::Predicate getProto() const override; |
| |
| Predicate* clone() const override; |
| |
| PredicateType getPredicateType() const override { |
| return kComparison; |
| } |
| |
| bool isAttributeLiteralComparisonPredicate() const override; |
| |
| bool matchesForSingleTuple(const ValueAccessor &accessor, |
| const tuple_id tuple) const override; |
| |
| bool matchesForJoinedTuples( |
| const ValueAccessor &left_accessor, |
| const relation_id left_relation_id, |
| const tuple_id left_tuple_id, |
| const ValueAccessor &right_accessor, |
| const relation_id right_relation_id, |
| const tuple_id right_tuple_id) const override; |
| |
| TupleIdSequence* getAllMatches(ValueAccessor *accessor, |
| const SubBlocksReference *sub_blocks_ref, |
| const TupleIdSequence *filter, |
| const TupleIdSequence *existence_map) const override; |
| |
| bool hasStaticResult() const override { |
| return (fast_comparator_.get() == nullptr); |
| } |
| |
| bool getStaticResult() const override; |
| |
| /** |
| * @brief Get the comparison operation for this predicate. |
| * |
| * @return This predicate's comparison. |
| **/ |
| const Comparison& getComparison() const { |
| return comparison_; |
| } |
| |
| /** |
| * @brief Get the left operand of this comparison. |
| * |
| * @return This comparison's left operand. |
| **/ |
| const Scalar& getLeftOperand() const { |
| DCHECK(left_operand_.get() != nullptr); |
| return *left_operand_; |
| } |
| |
| /** |
| * @brief Get the right operand of this comparison. |
| * |
| * @return This comparison's right operand. |
| **/ |
| const Scalar& getRightOperand() const { |
| DCHECK(right_operand_.get() != nullptr); |
| return *right_operand_; |
| } |
| |
| /** |
| * @brief For an attribute-literal comparison, determine whether the |
| * attribute is on the left and what its attribute_id is. |
| * @warning This is only usable if isAttributeLiteralComparisonPredicate() is |
| * true. |
| * |
| * @return A pair: first is true if attribute is on the left, false if on the |
| * right. second is the ID of the attribute. |
| **/ |
| std::pair<bool, attribute_id> getAttributeFromAttributeLiteralComparison() const; |
| |
| private: |
| const Comparison &comparison_; |
| std::unique_ptr<Scalar> left_operand_; |
| std::unique_ptr<Scalar> right_operand_; |
| bool static_result_; |
| std::unique_ptr<UncheckedComparator> fast_comparator_; |
| |
| void initHelper(bool own_children); |
| |
| DISALLOW_COPY_AND_ASSIGN(ComparisonPredicate); |
| }; |
| |
| /** @} */ |
| |
| } // namespace quickstep |
| |
| #endif // QUICKSTEP_EXPRESSIONS_PREDICATE_COMPARISON_PREDICATE_HPP_ |