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* 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
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
#include <memory>
#include <string>
#include <utility>
#include <vector>
#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 Expression;
class TupleIdSequence;
class ValueAccessor;
struct SubBlocksReference;
/** \addtogroup Expressions
* @{
* @brief A Predicate which is a comparison of two scalar values.
class ComparisonPredicate : public Predicate {
* @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 tuple_id left_tuple_id,
const ValueAccessor &right_accessor,
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;
void getFieldStringItems(
std::vector<std::string> *inline_field_names,
std::vector<std::string> *inline_field_values,
std::vector<std::string> *non_container_child_field_names,
std::vector<const Expression*> *non_container_child_fields,
std::vector<std::string> *container_child_field_names,
std::vector<std::vector<const Expression*>> *container_child_fields) const override;
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);
/** @} */
} // namespace quickstep