wu-sheng commented on code in PR #10448:
URL: https://github.com/apache/skywalking/pull/10448#discussion_r1118757785
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oap-server/server-storage-plugin/storage-banyandb-plugin/src/main/java/org/apache/skywalking/oap/server/storage/plugin/banyandb/MetadataRegistry.java:
##########
@@ -173,24 +172,31 @@ public Measure registerMeasureModel(Model model,
BanyanDBStorageConfig config, C
schemaBuilder.field(field.getName());
}
// parse TopN
- schemaBuilder.topNSpec(parseTopNSpec(model, schemaMetadata.name()));
+ schemaBuilder.topNSpec(parseTopNSpec(model, schemaMetadata.name(),
tagsAndFields));
registry.put(schemaMetadata.name(), schemaBuilder.build());
return builder.build();
}
- private TopNSpec parseTopNSpec(final Model model, final String
measureName) {
- final String valueCName =
ValueColumnMetadata.INSTANCE.getValueCName(model.getName());
- if (StringUtil.isEmpty(valueCName)) {
+ private TopNSpec parseTopNSpec(final Model model, final String
measureName, MeasureMetadata tagsAndFields) {
+ final Optional<ValueColumnMetadata.ValueColumn> valueColumnOpt =
ValueColumnMetadata.INSTANCE.readValueColumnDefinition(model.getName());
+ if (valueColumnOpt.isEmpty()) {
return null;
}
- // TODO: how to configure parameters?
+
+ List<String> groupByTagNames = new ArrayList<>();
+ groupByTagNames.add(Metrics.ENTITY_ID);
+ for (final TagMetadata tagSpec : tagsAndFields.tags) {
+ if
(tagSpec.getTagSpec().getTagName().equals(InstanceTraffic.SERVICE_ID)) {
+ groupByTagNames.add(InstanceTraffic.SERVICE_ID);
Review Comment:
All single value metrics, I think. We don't support labeled value metrics
for topN query.
That is why the manual setup is better than this hidden logic.
BTW, the top-N query support includes two cases, w/ or w/o parent service
ID. Usually instance Top-N should have service ID but it is not required from
protocol level. Also, service metric has no parent for topN
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