hanahmily commented on code in PR #54:
URL: 
https://github.com/apache/skywalking-banyandb-java-client/pull/54#discussion_r1580332675


##########
src/main/java/org/apache/skywalking/banyandb/v1/client/BanyanDBClient.java:
##########
@@ -348,11 +348,18 @@ public StreamWrite createStreamWrite(String group, String 
name, final String ele
     public StreamQueryResponse query(StreamQuery streamQuery) throws 
BanyanDBException {
         checkState(this.streamServiceStub != null, "stream service is null");
 
-        final BanyandbStream.QueryResponse response = 
HandleExceptionsWith.callAndTranslateApiException(() ->
-                this.streamServiceBlockingStub
-                        .withDeadlineAfter(this.getOptions().getDeadline(), 
TimeUnit.SECONDS)
-                        
.query(streamQuery.build(this.metadataCache.findMetadata(streamQuery.group, 
streamQuery.name))));
-        return new StreamQueryResponse(response);
+        for (String group : streamQuery.groups) {
+            MetadataCache.EntityMetadata em = 
this.metadataCache.findMetadata(group, streamQuery.name);
+            if (em != null) {
+                final BanyandbStream.QueryResponse response = 
HandleExceptionsWith.callAndTranslateApiException(() ->
+                        this.streamServiceBlockingStub
+                                
.withDeadlineAfter(this.getOptions().getDeadline(), TimeUnit.SECONDS)
+                                .query(streamQuery.build(em)));
+                return new StreamQueryResponse(response);

Review Comment:
   No, streamQuery includes all groups. Here, I simply use the first group to 
determine the resource's tag family and build the query request. This operation 
assumes that resources within these groups have the same tag family and tags.



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