Re: [I] [Feature] Support Spark expression: current_batch_timestamp [datafusion-comet]

["andygrove (via GitHub)" <gi...@apache.org>]

andygrove commented on issue #3104:
URL: https://github.com/apache/datafusion-comet/issues/3104#issuecomment-5113046429

   `CurrentBatchTimestamp` never reaches Comet's expression serde. It is streaming-only, and `IncrementalExecution` replaces it with a `Literal` on the optimized logical plan before physical planning (SPARK-18339):
   
   ```scala
   case ts @ CurrentBatchTimestamp(timestamp, _, _) => ts.toLiteral
   ```
   
   By the time a plan reaches Comet the expression is already a constant.
   
   Closing as not actionable as specified.


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