Function loadColumns

bolt/exec/OperatorUtils.cpp:374–392

void loadColumns(const RowVectorPtr& input, core::ExecCtx& execCtx) {
  LocalDecodedVector decodedHolder(execCtx);
  LocalSelectivityVector baseRowsHolder(&execCtx);
  LocalSelectivityVector rowsHolder(&execCtx);
  SelectivityVector* rows = nullptr;
  for (auto& child : input->children()) {
    if (isLazyNotLoaded(*child)) {
      if (!rows) {
        rows = rowsHolder.get(input->size());
        rows->setAll();
      }
      LazyVector::ensureLoadedRows(
          child,
          *rows,
          *decodedHolder.get(),
          *baseRowsHolder.get(input->size()));
    }
  }
}

void gatherCopy(
    BaseVector* target,
    vector_size_t targetIndex,
    vector_size_t count,