diff --git a/oap-server/oal-rt/src/main/java/org/apache/skywalking/oal/v2/generator/OALClassGeneratorV2.java b/oap-server/oal-rt/src/main/java/org/apache/skywalking/oal/v2/generator/OALClassGeneratorV2.java
index 3313ca8288c1..b50a142462bb 100644
--- a/oap-server/oal-rt/src/main/java/org/apache/skywalking/oal/v2/generator/OALClassGeneratorV2.java
+++ b/oap-server/oal-rt/src/main/java/org/apache/skywalking/oal/v2/generator/OALClassGeneratorV2.java
@@ -89,7 +89,16 @@ public class OALClassGeneratorV2 {
         "deserialize",
         "getMeta",
         "toHour",
-        "toDay"
+        "toDay",
+        // Emits the source's @ScopeDefaultColumn fields (the codegen-
+        // materialised dynamic @Column fields on the generated subclass)
+        // onto the dsl-debugging `output` sample. For a Service-style
+        // scope that is exactly entityId + attr0..attr5 — nothing about
+        // the metric's own value, which is delegated upward via
+        // super.appendDebugFields(obj) to the family parent's override
+        // (CPMMetrics emits total + value, SumMetrics emits value,
+        // LongAvgMetrics emits summation + count + value, …).
+        "appendDebugFields"
     };
     private static final String[] METRICS_BUILDER_CLASS_METHODS = {
         "entity2Storage",
diff --git a/oap-server/oal-rt/src/main/resources/code-templates-v2/metrics/appendDebugFields.ftl b/oap-server/oal-rt/src/main/resources/code-templates-v2/metrics/appendDebugFields.ftl
new file mode 100644
index 000000000000..0af18f7a905b
--- /dev/null
+++ b/oap-server/oal-rt/src/main/resources/code-templates-v2/metrics/appendDebugFields.ftl
@@ -0,0 +1,18 @@
+protected void appendDebugFields(com.google.gson.JsonObject obj) {
+super.appendDebugFields(obj);
+<#list fieldsFromSource as field>
+    <#if field.typeName == "long">
+        obj.addProperty("${field.columnName}", java.lang.Long.valueOf(${field.fieldGetter}()));
+    <#elseif field.typeName == "int">
+        obj.addProperty("${field.columnName}", java.lang.Integer.valueOf(${field.fieldGetter}()));
+    <#elseif field.typeName == "double">
+        obj.addProperty("${field.columnName}", java.lang.Double.valueOf(${field.fieldGetter}()));
+    <#elseif field.typeName == "float">
+        obj.addProperty("${field.columnName}", java.lang.Float.valueOf(${field.fieldGetter}()));
+    <#elseif field.typeName == "boolean">
+        obj.addProperty("${field.columnName}", java.lang.Boolean.valueOf(${field.fieldGetter}()));
+    <#else>
+        obj.addProperty("${field.columnName}", ${field.fieldGetter}() == null ? null : ${field.fieldGetter}().toString());
+    </#if>
+</#list>
+}