fix: optimize gRPC command result serialization by refining scalar result handling and emission logic

Author: robfrank

grpcw/src/main/java/com/arcadedb/server/grpc/ArcadeDbGrpcService.java

@@ -194,37 +194,27 @@ public void executeCommand(ExecuteCommandRequest req, StreamObserver<ExecuteComm
             LogManager.instance().log(this, Level.FINE, "executeCommand(): returning rows ...");
 
             int emitted = 0;
-
             while (rs.hasNext()) {
 
               Result result = rs.next();
+
               if (result.isElement()) {
-                affected++; // count modified/returned records
-                if (emitted < maxRows) {
-                  // Convert Result to GrpcRecord, preserving aliases and all properties
-                  GrpcRecord grpcRecord = convertResultToGrpcRecord(result, db,
-                      new ProjectionConfig(true, ProjectionEncoding.PROJECTION_AS_JSON, 0));
-                  out.addRecords(grpcRecord);
-                  emitted++;
-                }
+                affected++;
               } else {
-
-                // Scalar / projection row (e.g., RETURN COUNT)
-
-                if (emitted < maxRows) {
-
-                  GrpcRecord.Builder recB = GrpcRecord.newBuilder();
-
-                  for (String p : result.getPropertyNames()) {
-
-                    recB.putProperties(p, convertPropToGrpcValue(p, result));
+                for (String p : result.getPropertyNames()) {
+                  Object v = result.getProperty(p);
+                  if (v instanceof Number n) {
+                    affected += n.longValue();
                   }
-
-                  out.addRecords(recB.build());
-
-                  emitted++;
                 }
+              }
 
+              if (emitted < maxRows) {
+                // Convert Result to GrpcRecord, preserving aliases and all properties
+                GrpcRecord grpcRecord = convertResultToGrpcRecord(result, db,
+                    new ProjectionConfig(true, ProjectionEncoding.PROJECTION_AS_JSON, 0));
+                out.addRecords(grpcRecord);
+                emitted++;
               }
             }
           } else {