[Spark] Support union read that can combine snapshot data and change-log data #2427
Description
Search before asking
- I searched in the issues and found nothing similar.
Motivation
For primary-key table, Spark should enable to combine snapshot data from fluss server or data lake and chang-log data to get the freshest data.
Solution
No response
Anything else?
No response
Willingness to contribute
- I'm willing to submit a PR!