andygrove opened a new issue, #3874:
URL: https://github.com/apache/datafusion-comet/issues/3874
### Describe the bug
In TPC-DS, the fact table scans fall back to Spark because they use DPP. For
some reason, the filter that wraps the scan also falls back to Spark, but Comet
uses JVM shuffle write after the filter. This means there are two transitions
in the plan.
```
CometShuffleWriter
CometRowToColumnar
SparkFilter
SparkColumnarToRow
SparkScan
```
The `CometRowToColumnar` also involves FFI transfers.
### Steps to reproduce
_No response_
### Expected behavior
_No response_
### Additional context
_No response_
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
