sahnib commented on code in PR #44961:
URL: https://github.com/apache/spark/pull/44961#discussion_r1489781696


##########
sql/core/src/test/scala/org/apache/spark/sql/execution/streaming/state/RocksDBSuite.scala:
##########
@@ -845,6 +859,76 @@ class RocksDBSuite extends 
AlsoTestWithChangelogCheckpointingEnabled with Shared
     }
   }
 
+  test("ensure merge operation is not supported if column families is not 
enabled") {
+    withTempDir { dir =>
+      val remoteDir = Utils.createTempDir().toString
+      val conf = dbConf.copy(minDeltasForSnapshot = 5, compactOnCommit = false)
+      new File(remoteDir).delete() // to make sure that the directory gets 
created
+      withDB(remoteDir, conf = conf, useColumnFamilies = false) { db =>
+        db.load(0)
+        db.put("a", "1")
+        intercept[RuntimeException](
+          db.merge("a", "2")
+        )
+      }
+    }
+  }
+
+  test(s"RocksDB: ensure merge operation correctness") {

Review Comment:
   Done.



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