public int getTableDeviceNotExistNum(final String tableName, final List<Object[]> deviceIdList) {
    final IMemMNode tableNode = storageGroupMNode.getChild(tableName);
    int notExistNum = deviceIdList.size();
    if (tableNode == null) {
      return notExistNum;
    }
    IMemMNode cur;
    for (final Object[] deviceId : deviceIdList) {
      cur = tableNode;
      for (final Object device : deviceId) {
        cur = cur.getChild(Objects.nonNull(device) ? device.toString() : null);
        if (cur == null) {
          break;
        }
      }
      if (Objects.nonNull(cur)) {
        notExistNum--;
      }
    }
    return notExistNum;
  }
Get node by the path

@return last node in given seriesPath
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/schemaengine/schemaregion/mtree/impl/mem/MTreeBelowSGMemoryImpl.java