Wang Cheng

Hi @majin1102 thanks for your reply. It seems the fragment API only accepts rowIndexes, which means ingestion engine needs to maintain the indexes for all primary keys, correct?

> > Hi [@majin1102](https://github.com/majin1102) thanks for your reply. It seems the fragment API only accepts rowIndexes, which means ingestion engine needs to maintain the indexes for all primary keys, correct?...

> I think the idea is to directly build a Dataset object and use the merge-insert API in each writer. By that we need carefully partitioning data before writer to...