Function exportFlat

bolt/vector/arrow/Bridge.cpp:1107–1165

      memcpy(rawBuffer, sv.data(), sv.size());
      rawBuffer += sv.size();
      newOffset += sv.size();
    }
    *++rawOffsets = newOffset;
  });
  BOLT_DCHECK_EQ(bufSize, *rawOffsets);
}

void exportFlat(
    const BaseVector& vec,
    const Selection& rows,
    const ArrowOptions& options,
    ArrowArray& out,
    memory::MemoryPool* pool,
    BoltToArrowBridgeHolder& holder) {
  out.n_children = 0;
  out.children = nullptr;
  switch (vec.typeKind()) {
    case TypeKind::BOOLEAN:
    case TypeKind::TINYINT:
    case TypeKind::SMALLINT:
    case TypeKind::INTEGER:
    case TypeKind::BIGINT:
    case TypeKind::HUGEINT:
    case TypeKind::REAL:
    case TypeKind::DOUBLE:
    case TypeKind::TIMESTAMP:
      exportValues(vec, rows, options, out, pool, holder);
      break;
    case TypeKind::UNKNOWN:
      if (options.exportToArrowIPC) {
        out.n_buffers = 0;
      }
      break;
    case TypeKind::VARCHAR:
    case TypeKind::VARBINARY:
      if (options.exportToView) {
        exportValues(vec, rows, options, out, pool, holder);
        exportViews(
            *vec.asUnchecked<FlatVector<StringView>>(),
            rows,
            options,
            out,
            pool,
            holder);
      } else if (options.useLargeString) {
        exportStrings<int64_t>(
            *vec.asUnchecked<FlatVector<StringView>>(),
            rows,
            out,
            pool,
            holder);
      } else {
        exportStrings<int32_t>(
            *vec.asUnchecked<FlatVector<StringView>>(),
            rows,
            out,
            pool,
            holder);