Method getMemoryUseByName

c++/src/Reader.cc:991–1007

  }

  uint64_t ReaderImpl::getMemoryUseByName(const std::list<std::string>& names, int stripeIx) {
    std::vector<bool> selectedColumns;
    selectedColumns.assign(static_cast<size_t>(contents_->footer->types_size()), false);
    ColumnSelector column_selector(contents_.get());
    if (contents_->schema->getKind() == STRUCT && names.begin() != names.end()) {
      for (std::list<std::string>::const_iterator field = names.begin(); field != names.end();
           ++field) {
        column_selector.updateSelectedByName(selectedColumns, *field);
      }
    } else {
      // default is to select all columns
      std::fill(selectedColumns.begin(), selectedColumns.end(), true);
    }
    column_selector.selectParents(selectedColumns, *contents_->schema.get());
    selectedColumns[0] = true;  // column 0 is selected by default
    return getMemoryUse(stripeIx, selectedColumns);
  }

  uint64_t ReaderImpl::getMemoryUseByTypeId(const std::list<uint64_t>& include, int stripeIx) {
    std::vector<bool> selectedColumns;