Method read

bolt/dwio/common/CachedBufferedInput.cpp:544–561

    LogType /*logType*/) const {
  BOLT_CHECK_LE(offset + length, fileSize_);
  return std::make_unique<CacheInputStream>(
      const_cast<CachedBufferedInput*>(this),
      ioStats_.get(),
      Region{offset, length},
      input_,
      fileNum_,
      cacheable_,
      columnCacheBlackList_,
      nullptr,
      TrackingId(),
      0,
      options_.loadQuantum());
}

bool CachedBufferedInput::prefetch(Region region) {
  int32_t numPages = memory::AllocationTraits::numPages(region.length);
  if (!shouldPreload(numPages)) {
    return false;
  }
  auto stream = enqueue(region, nullptr);
  load(LogType::FILE);