Github user yhuai commented on a diff in the pull request:
https://github.com/apache/spark/pull/13815#discussion_r68285294
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/command/commands.scala
---
@@ -98,7 +100,12 @@ case class ExplainCommand(
// Run through the optimizer to generate the physical plan.
override def run(sparkSession: SparkSession): Seq[Row] = try {
- val queryExecution = sparkSession.sessionState.executePlan(logicalPlan)
+ val queryExecution =
+ if (logicalPlan.isStreaming) {
+ new IncrementalExecution(sparkSession, logicalPlan,
OutputMode.Append(), "<unknown>", 0)
--- End diff --
Is this used only by the df/ds created by `spark.read.stream` (so, the mode
at here does not matter?)? Maybe we should add a comment at here?
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