add spark.auron.enable.broadcastexchange to control BroadcastExchangeExec into Native or not

[guixiaowen]

Currently, BroadcastExchangeExec is directly converted to the native plan, and there is no switch to control this conversion.
For example,
SortExec can be controlled by setting spark.auron.enable.sort to false or true.

In Spark, the creation of BroadcastExchangeExec occurs together with BroadcastHashJoin and BroadcastNestedLoopJoin.
You can enable the corresponding settings for these two joins first, and then convert BroadcastExchangeExec to native, thereby controlling whether BroadcastExchangeExec is converted to native.

[richox]

i suggest to add spark.auron.enable.shuffleexchange and spark.auron.enable.broadcastexchange to handle ShuffleExchangeExec/BroadcastExchangeExec independently.

[guixiaowen]

i suggest to add spark.auron.enable.shuffleexchange and spark.auron.enable.broadcastexchange to handle ShuffleExchangeExec/BroadcastExchangeExec independently.

@richox
Okay, I’ll implement it this way.

1. Add two configuration variables: spark.auron.enable.shuffleexchange and spark.auron.enable.broadcastexchange.
2. spark.auron.enable.shuffleexchange controls whether ShuffleExchangeExec is converted to native.If set to true, the shuffle manager must be the Auron shuffle manager.
3. spark.auron.enable.broadcastexchange controls whether BroadcastExchangeExec is converted to native.