srowen commented on a change in pull request #23835: 
[SPARK-24783][SQL]spark.sql.shuffle.partitions=0 should throw exception
URL: https://github.com/apache/spark/pull/23835#discussion_r258114152
 
 

 ##########
 File path: 
sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala
 ##########
 @@ -305,6 +305,26 @@ class SQLMetricsSuite extends SparkFunSuite with 
SQLMetricsTestUtils with Shared
     }
   }
 
+  test("shuffle.partitions=0" ) {
+    withSQLConf("spark.sql.autoBroadcastJoinThreshold" -> "40",
+      "spark.sql.shuffle.partitions" -> "-1",
 
 Review comment:
   Don't you want to test 0?

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