cloud-fan commented on a change in pull request #23853: [SPARK-26952][SQL] Row
count statics should respect the data reported by data source
URL: https://github.com/apache/spark/pull/23853#discussion_r259344107
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/v2/DataSourceV2Relation.scala
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@@ -56,7 +56,14 @@ case class DataSourceV2Relation(
scan match {
case r: SupportsReportStatistics =>
val statistics = r.estimateStatistics()
- Statistics(sizeInBytes =
statistics.sizeInBytes().orElse(conf.defaultSizeInBytes))
+ val numRows: Option[BigInt] = if (statistics.numRows().isPresent) {
+ Some(statistics.numRows().getAsLong)
+ } else {
+ None
+ }
+ Statistics(
Review comment:
shall we create a util method to turn v2 statistics to spark statistics?
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