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[MINOR][DOCS] Fix comments of SQLExecution#withExecutionId

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## What changes were proposed in this pull request?
Fix comment. Change `BroadcastHashJoin.broadcastFuture` to `BroadcastExchangeExec.relationFuture`: d28d5732ae/sql/core/src/main/scala/org/apache/spark/sql/execution/exchange/BroadcastExchangeExec.scala (L66)

## How was this patch tested?
N/A

Author: seancxmao <seancxmao@gmail.com>

Closes #21113 from seancxmao/SPARK-13136.
This commit is contained in:
seancxmao 2018-04-24 16:16:07 +08:00 committed by hyukjinkwon
parent 281c1ca0dc
commit c303b1b676
1 changed files with 1 additions and 1 deletions
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sql/core/src/main/scala/org/apache/spark/sql/execution/SQLExecution.scala
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@ -88,7 +88,7 @@ object SQLExecution {
/**
* Wrap an action with a known executionId. When running a different action in a different
* thread from the original one, this method can be used to connect the Spark jobs in this action
* with the known executionId, e.g., `BroadcastHashJoin.broadcastFuture`.
* with the known executionId, e.g., `BroadcastExchangeExec.relationFuture`.
*/
def withExecutionId[T](sc: SparkContext, executionId: String)(body: => T): T = {
val oldExecutionId = sc.getLocalProperty(SQLExecution.EXECUTION_ID_KEY)