cloud-fan commented on a change in pull request #24715: [SPARK-25474][SQL] Data
source tables support fallback to HDFS for size estimation
URL: https://github.com/apache/spark/pull/24715#discussion_r315038877
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
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@@ -619,3 +619,34 @@ object DataSourceStrategy {
(nonconvertiblePredicates ++ unhandledPredicates, pushedFilters,
handledFilters)
}
}
+
+
+/**
+ * Defines default table statistics if table statistics are not available.
+ */
+class DetermineTableStats(session: SparkSession) extends Rule[LogicalPlan] {
Review comment:
I see there are rules using case class, and rules using normal class. I
don't have a strong preference here.
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