attilapiros commented on a change in pull request #24221: [SPARK-27248][SQL]
refresh table should recreate cache with same cache name
URL: https://github.com/apache/spark/pull/24221#discussion_r269541055
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File path: sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala
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@@ -205,6 +205,20 @@ abstract class QueryTest extends PlanTest {
planWithCaching)
}
+ /**
+ * Asserts that a given [[Dataset]] will be executed using the given named
cache.
+ */
+ def assertCached(query: Dataset[_], cachedName: String): Unit = {
+ val planWithCaching = query.queryExecution.withCachedData
+ val cachedTableNames = planWithCaching collect {
+ case cached: InMemoryRelation => cached.cacheBuilder.tableName
Review comment:
The result type of the `tableName` is `Option[String]`:
https://github.com/apache/spark/blob/ca13fc4649a8ef59e12c73a50f4cda7f1980077f/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/InMemoryRelation.scala#L46-L51
So the `collect` will produce `Seq[Option[String]]` and will contain
tablenames as `Some[String]` so this assert will be raised always as
`cachedName` is `String`:
https://github.com/apache/spark/blob/ca13fc4649a8ef59e12c73a50f4cda7f1980077f/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala#L218
Is not it?
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