fix

spark/src/test/scala/org/apache/spark/sql/CometSQLQueryTestHelper.scala

@@ -35,7 +35,7 @@ trait CometSQLQueryTestHelper {
 
   private val notIncludedMsg = "[not included in comparison]"
   private val clsName = this.getClass.getCanonicalName
-  protected val emptySchema = StructType(Seq.empty).catalogString
+  protected val emptySchema: String = StructType(Seq.empty).catalogString
 
   protected def replaceNotIncludedMsg(line: String): String = {
     line
@@ -63,8 +63,6 @@ trait CometSQLQueryTestHelper {
     }
 
     val df = session.sql(sql)
-    df.explain()
-    df.show()
     val schema = df.schema.catalogString
     // Get answer, but also get rid of the #1234 expression ids that show up in explain plans
     val answer = SQLExecution.withNewExecutionId(df.queryExecution, Some(sql)) {
@@ -93,7 +91,7 @@ trait CometSQLQueryTestHelper {
         // Do not output the logical plan tree which contains expression IDs.
         // Also implement a crude way of masking expression IDs in the error message
         // with a generic pattern "###".
-        val msg = if (a.plan.nonEmpty) a.getSimpleMessage else a.getMessage
+        val msg = a.getMessage
         (emptySchema, Seq(a.getClass.getName, msg.replaceAll("#\\d+", "#x")))
       case s: SparkException if s.getCause != null =>
         // For a runtime exception, it is hard to match because its message contains