Method GetAttributeTrail

extensions/select_optimization.cc:660–673

}

AttributeTrail OptimizedSelectImpl::GetAttributeTrail(
    const AttributeTrail& operand_trail) const {
  if (operand_trail.empty()) {
    return AttributeTrail();
  }
  std::vector<AttributeQualifier> qualifiers = std::vector<AttributeQualifier>(
      operand_trail.attribute().qualifier_path().begin(),
      operand_trail.attribute().qualifier_path().end());
  qualifiers.reserve(qualifiers_.size() + qualifiers.size());
  absl::c_copy(qualifiers_, std::back_inserter(qualifiers));
  return AttributeTrail(
      Attribute(std::string(operand_trail.attribute().variable_name()),
                std::move(qualifiers)));
}

class StackMachineImpl : public ExpressionStepBase {
 public: