viirya opened a new issue, #81:
URL: https://github.com/apache/arrow-datafusion-comet/issues/81
### What is the problem the feature request solves?
We need to support broadcasting the result of Comet native operator. This is
another step towards supporting `BroadcastHashJoinExec`.
Like Spark `BroadcastExchangeExec`, `CometBroadcastExchangeExec` is not
directly called with `doExecute` or `doExecuteColumnar` as other operators.
`CometBroadcastExchangeExec` is used when Spark query planner inserts
BroadcastDistribution on top of an operator to broadcast it. The upstream
operator of `CometBroadcastExchangeExec`, e.g., `BroadcastHashJoinExec`, will
call `executeBroadcast` method of `CometBroadcastExchangeExec` to execute the
query plan and broadcast its results.
### Describe the potential solution
_No response_
### Additional context
_No response_
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