harshmotw-db commented on code in PR #50108:
URL: https://github.com/apache/spark/pull/50108#discussion_r1975885008


##########
sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala:
##########
@@ -326,7 +326,13 @@ object QueryTest extends Assertions {
     // For binary arrays, we convert it to Seq to avoid of calling 
java.util.Arrays.equals for
     // equality test.
     val converted: Seq[Row] = answer.map(prepareRow)
-    if (!isSorted) converted.sortBy(_.toString()) else converted
+    // SPARK-51349: "null" and null had the same precedence in sorting
+    if (!isSorted) converted.sortBy( r =>
+      Row(r.toSeq.map {
+        case null => "000_aaa_null"

Review Comment:
   This is what I got: `java.lang.IllegalArgumentException: requirement failed: 
JSON serialization requires a non-null schema.`



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