Github user HyukjinKwon commented on a diff in the pull request:

    https://github.com/apache/spark/pull/21882#discussion_r205935387
  
    --- Diff: 
sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/PartitionBatchPruningSuite.scala
 ---
    @@ -71,12 +78,21 @@ class PartitionBatchPruningSuite
         }, 5).toDF()
         pruningStringData.createOrReplaceTempView("pruningStringData")
         spark.catalog.cacheTable("pruningStringData")
    +
    +    val pruningArrayData = sparkContext.makeRDD(testArrayData, 5).toDF()
    +    pruningArrayData.createOrReplaceTempView("pruningArrayData")
    +    spark.catalog.cacheTable("pruningArrayData")
    +
    +    val pruningBinaryData = sparkContext.makeRDD(testBinaryData, 5).toDF()
    --- End diff --
    
    ```
    scala> spark.sparkContext.makeRDD((1 to 100).map { key => 
Tuple1(Array.fill(key)(key.toByte)) }, 5).toDF().printSchema()
    root
     |-- _1: binary (nullable = true)
    ```


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