lujiajing1126 commented on code in PR #10448: URL: https://github.com/apache/skywalking/pull/10448#discussion_r1118877729
########## 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 I've added `@TopNAggregation` for - OAL: dynamically annotate `@TopNAggregation` for single-valued metrics, - MAL: only annotate `@MeterFunction`s that generate single value -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: notifications-unsubscr...@skywalking.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org