wu-sheng commented on code in PR #10448:
URL: https://github.com/apache/skywalking/pull/10448#discussion_r1118967182
##########
oap-server/server-storage-plugin/storage-banyandb-plugin/src/main/java/org/apache/skywalking/oap/server/storage/plugin/banyandb/BanyanDBAggregationQueryDAO.java:
##########
@@ -85,24 +60,45 @@ protected void apply(MeasureQuery query) {
throw new IOException("field spec is not registered");
}
+ if (schema.getTopNSpec() == null) {
+ throw new IOException("TopN spec is registered");
+ }
+
+ TopNQueryResponse resp = null;
+ if (condition.getOrder() == Order.DES) {
+ resp = topN(schema, timestampRange, condition.getTopN(),
additionalConditions);
+ } else {
+ resp = bottomN(schema, timestampRange, condition.getTopN(),
additionalConditions);
+ }
Review Comment:
I think server side should treat topN more complex. Such as, we have
conditions(service id) as filter, put pre aggregated list according to service
candidate?
Anyway, we need a solution for this. Otherwise, this is a bug. In a
distributed system, some services are slower than others.
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