Github user maropu commented on a diff in the pull request:
https://github.com/apache/spark/pull/21018#discussion_r183288666
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala ---
@@ -794,4 +794,17 @@ class CachedTableSuite extends QueryTest with
SQLTestUtils with SharedSQLContext
}
}
}
+
+ private def isMaterialized(df: DataFrame): Boolean = {
+ val nodes = df.queryExecution.executedPlan.collect { case c:
InMemoryTableScanExec => c }
+ assert(nodes.nonEmpty, "DataFrame is not cached\n" +
df.queryExecution.analyzed)
+ nodes.forall(_.relation.cacheBuilder._cachedColumnBuffers != null)
+ }
+
+ test("SPARK-23880 table cache should be lazy and don't trigger any
jobs") {
--- End diff --
ok
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