Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/18347#discussion_r123322259
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/console.scala
---
@@ -60,5 +70,23 @@ class ConsoleSinkProvider extends StreamSinkProvider
with DataSourceRegister {
new ConsoleSink(parameters)
}
+ def createRelation(
+ sqlContext: SQLContext,
+ mode: SaveMode,
+ parameters: Map[String, String],
+ data: DataFrame): BaseRelation = {
+ // Number of rows to display, by default 20 rows
+ val numRowsToShow =
parameters.get("numRows").map(_.toInt).getOrElse(20)
+
+ // Truncate the displayed data if it is too long, by default it is true
+ val isTruncated =
parameters.get("truncate").map(_.toBoolean).getOrElse(true)
+
+ data.sparkSession.createDataFrame(
--- End diff --
You can just call `data.showInternal(numRowsToShow, isTruncated)`. This is
a hack in ConsoleSink to avoid using a wrong planner. That's not a problem in
the batch DataFrames.
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