HyukjinKwon commented on a change in pull request #26127: [SPARK-29348][SQL]
Add observable Metrics for Streaming queries
URL: https://github.com/apache/spark/pull/26127#discussion_r361887928
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/QueryExecution.scala
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@@ -106,6 +106,9 @@ class QueryExecution(
lazy val toRdd: RDD[InternalRow] = new SQLExecutionRDD(
executedPlan.execute(), sparkSession.sessionState.conf)
+ /** Get the metrics observed during the execution of the query plan. */
+ def observedMetrics: Map[String, Row] =
CollectMetricsExec.collect(executedPlan)
Review comment:
`@DeveloperApi` implies:
> A lower-level, unstable API intended for developers.
I agree that It might have to be considered a public class but unstable. I
am sure most of methods there are discouraged even for developers to use
without knowing exactly what it does.
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