Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/16401#discussion_r94344029
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/LogicalPlan.scala
---
@@ -95,6 +96,29 @@ abstract class LogicalPlan extends
QueryPlan[LogicalPlan] with Logging {
}
/**
+ * Returns the default statistics or statistics estimated by cbo based
on configuration.
+ */
+ final def planStats(conf: CatalystConf): Statistics = {
+ if (conf.cboEnabled) {
+ if (estimatedStats.isEmpty) {
+ estimatedStats = Some(cboStatistics(conf))
+ }
+ estimatedStats.get
+ } else {
+ statistics
+ }
--- End diff --
The above logics can be shorten to one line:
```Scala
if (conf.cboEnabled) estimatedStats.getOrElse(cboStatistics(conf)) else
statistics
```
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