query_optimizer/logical/UpdateTable.cpp

/**
 *   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.
 **/

#include "query_optimizer/logical/UpdateTable.hpp"

#include <string>
#include <vector>

#include "query_optimizer/OptimizerTree.hpp"
#include "query_optimizer/expressions/AttributeReference.hpp"
#include "query_optimizer/expressions/Predicate.hpp"
#include "query_optimizer/expressions/Scalar.hpp"
#include "utility/Cast.hpp"

#include "glog/logging.h"

namespace quickstep {
namespace optimizer {
namespace logical {

LogicalPtr UpdateTable::copyWithNewChildren(
    const std::vector<LogicalPtr> &new_children) const {
  DCHECK_EQ(getNumChildren(), new_children.size());
  return Create(new_children[0], assignees_, assignment_expressions_,
                predicate_);
}

std::vector<expressions::AttributeReferencePtr> UpdateTable::getReferencedAttributes() const {
  std::vector<expressions::AttributeReferencePtr> referenced_attributes = assignees_;
  for (const expressions::ScalarPtr& assignment_expression : assignment_expressions_) {
    std::vector<expressions::AttributeReferencePtr> attrs_referenced_in_expression =
        assignment_expression->getReferencedAttributes();
    referenced_attributes.insert(referenced_attributes.end(),
                                 attrs_referenced_in_expression.begin(),
                                 attrs_referenced_in_expression.end());
  }
  if (predicate_ != nullptr) {
    std::vector<expressions::AttributeReferencePtr> attrs_referenced_in_predicate =
        predicate_->getReferencedAttributes();
    referenced_attributes.insert(referenced_attributes.end(),
                                 attrs_referenced_in_predicate.begin(),
                                 attrs_referenced_in_predicate.end());
  }
  return referenced_attributes;
}

void UpdateTable::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<OptimizerTreeBaseNodePtr> *non_container_child_fields,
    std::vector<std::string> *container_child_field_names,
    std::vector<std::vector<OptimizerTreeBaseNodePtr>> *container_child_fields) const {
  non_container_child_field_names->push_back("input");
  non_container_child_fields->push_back(input_);
  if (predicate_ != nullptr) {
    non_container_child_field_names->push_back("predicate");
    non_container_child_fields->push_back(predicate_);
  }

  container_child_field_names->push_back("attributes");
  container_child_fields->push_back(CastSharedPtrVector<OptimizerTreeBase>(assignees_));
  container_child_field_names->push_back("assigned_values");
  container_child_fields->push_back(
      CastSharedPtrVector<OptimizerTreeBase>(assignment_expressions_));
}

}  // namespace logical
}  // namespace optimizer
}  // namespace quickstep