Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/19252#discussion_r139569666
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/StatisticsCollectionSuite.scala ---
@@ -261,6 +261,11 @@ class StatisticsCollectionSuite extends
StatisticsCollectionTestBase with Shared
assert(fetched1.get.sizeInBytes == 0)
assert(fetched1.get.colStats.size == 2)
+ // compute stats based on the catalog table metadata and
+ // put the relation into the catalog cache
+ sql(s"EXPLAIN COST SELECT DISTINCT * FROM $table")
--- End diff --
Could you replace the usage of `EXPLAIN COST` by
```Scala
// Table lookup will make the table cached.
spark.table(table)
```
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