diff --git a/spark/src/main/scala/org/apache/spark/sql/comet/operators.scala b/spark/src/main/scala/org/apache/spark/sql/comet/operators.scala
index 8545eee90..1065367c2 100644
--- a/spark/src/main/scala/org/apache/spark/sql/comet/operators.scala
+++ b/spark/src/main/scala/org/apache/spark/sql/comet/operators.scala
@@ -727,6 +727,16 @@ case class CometSortMergeJoinExec(
 
   override def hashCode(): Int =
     Objects.hashCode(leftKeys, rightKeys, condition, left, right)
+
+  override lazy val metrics: Map[String, SQLMetric] =
+    Map(
+      "input_batches" -> SQLMetrics.createMetric(sparkContext, "Number of batches consumed"),
+      "input_rows" -> SQLMetrics.createMetric(sparkContext, "Number of rows consumed"),
+      "output_batches" -> SQLMetrics.createMetric(sparkContext, "Number of batches produced"),
+      "output_rows" -> SQLMetrics.createMetric(sparkContext, "Number of rows produced"),
+      "peak_mem_used" ->
+        SQLMetrics.createSizeMetric(sparkContext, "Peak memory used for buffered data"),
+      "join_time" -> SQLMetrics.createNanoTimingMetric(sparkContext, "Total time for joining"))
 }
 
 case class CometScanWrapper(override val nativeOp: Operator, override val originalPlan: SparkPlan)