diff --git a/bindings/CXX11/adios2/cxx11/Query.cpp b/bindings/CXX11/adios2/cxx11/Query.cpp
index 23bbd8c6c6..ae5b3f3eb0 100644
--- a/bindings/CXX11/adios2/cxx11/Query.cpp
+++ b/bindings/CXX11/adios2/cxx11/Query.cpp
@@ -14,7 +14,13 @@ QueryWorker::QueryWorker(const std::string &configFile, adios2::Engine &reader)
     delete m;
 }
 
-void QueryWorker::GetResultCoverage(adios2::Box<adios2::Dims> &outputSelection,
+void QueryWorker::GetResultCoverage(std::vector<adios2::Box<adios2::Dims>> &touched_blocks)
+{
+  adios2::Box<adios2::Dims> empty;
+  GetResultCoverage(empty, touched_blocks);
+}
+
+void QueryWorker::GetResultCoverage(const adios2::Box<adios2::Dims> &outputSelection,
                                     std::vector<adios2::Box<adios2::Dims>> &touched_blocks)
 {
     if (m_Worker)
diff --git a/bindings/CXX11/adios2/cxx11/Query.h b/bindings/CXX11/adios2/cxx11/Query.h
index a4dd046d38..1b26ab62d6 100644
--- a/bindings/CXX11/adios2/cxx11/Query.h
+++ b/bindings/CXX11/adios2/cxx11/Query.h
@@ -26,9 +26,15 @@ class Worker;
 class QueryWorker
 {
 public:
+    // configFile has query, can be either xml or json
     QueryWorker(const std::string &configFile, adios2::Engine &engine);
 
-    void GetResultCoverage(adios2::Box<adios2::Dims> &,
+    // touched_blocks is a list of regions specified by (start, count),
+    // that contains data that satisfies the query file
+    void GetResultCoverage(std::vector<adios2::Box<adios2::Dims>> &touched_blocks);
+
+    // supply output bound for the results
+    void GetResultCoverage(const adios2::Box<adios2::Dims> &,
                            std::vector<adios2::Box<adios2::Dims>> &touched_blocks);
 
 private:
diff --git a/bindings/Python/py11Query.cpp b/bindings/Python/py11Query.cpp
index 87c2014967..0e82cae6bb 100644
--- a/bindings/Python/py11Query.cpp
+++ b/bindings/Python/py11Query.cpp
@@ -30,9 +30,8 @@ Query::operator bool() const noexcept { return (m_QueryWorker == nullptr) ? fals
 
 std::vector<Box<Dims>> Query::GetResult()
 {
-    // std::cout<<"Do something"<<std::endl;
-    adios2::Box<adios2::Dims> empty; // look into all data
     std::vector<Box<Dims>> touched_blocks;
+    adios2::Box<adios2::Dims> empty;
     m_QueryWorker->GetResultCoverage(empty, touched_blocks);
     return touched_blocks;
 }
diff --git a/bindings/Python/py11Query.h b/bindings/Python/py11Query.h
index df04fd3e59..b8cd29018b 100644
--- a/bindings/Python/py11Query.h
+++ b/bindings/Python/py11Query.h
@@ -34,8 +34,6 @@ class Query
     explicit operator bool() const noexcept;
 
     std::vector<Box<Dims>> GetResult();
-    // const Box< Dims > & refinedSelectionIfAny,
-    // std::vector< Box< Dims > > &touched_blocks
 
 private:
     Query(adios2::query::Worker *qw);
diff --git a/examples/query/test.cpp b/examples/query/test.cpp
index 8d866a3085..c825fbfea6 100644
--- a/examples/query/test.cpp
+++ b/examples/query/test.cpp
@@ -22,8 +22,7 @@ void queryWithStreaming(adios2::IO &queryIO, std::string &dataFileName, std::str
     while (reader.BeginStep() == adios2::StepStatus::OK)
     {
         adios2::QueryWorker w = adios2::QueryWorker(queryFile, reader);
-        adios2::Box<adios2::Dims> empty;
-        w.GetResultCoverage(empty, touched_blocks);
+	w.GetResultCoverage(touched_blocks);
 
         std::cout << " ... now can read out touched blocks ... size=" << touched_blocks.size()
                   << std::endl;
diff --git a/testing/adios2/performance/query/TestBPQuery.cpp b/testing/adios2/performance/query/TestBPQuery.cpp
index d84784db59..a3ff5ae4a2 100644
--- a/testing/adios2/performance/query/TestBPQuery.cpp
+++ b/testing/adios2/performance/query/TestBPQuery.cpp
@@ -107,8 +107,7 @@ void BPQueryTest::QueryIntVar(const std::string &fname, adios2::ADIOS &adios,
     {
         adios2::QueryWorker w = adios2::QueryWorker(queryFile, bpReader);
         std::vector<adios2::Box<adios2::Dims>> touched_blocks;
-        adios2::Box<adios2::Dims> empty;
-        w.GetResultCoverage(empty, touched_blocks);
+        w.GetResultCoverage(touched_blocks);
         ASSERT_EQ(touched_blocks.size(), rr[bpReader.CurrentStep()]);
         bpReader.EndStep();
     }
@@ -143,8 +142,7 @@ void BPQueryTest::QueryDoubleVar(const std::string &fname, adios2::ADIOS &adios,
     {
         adios2::QueryWorker w = adios2::QueryWorker(queryFile, bpReader);
         std::vector<adios2::Box<adios2::Dims>> touched_blocks;
-        adios2::Box<adios2::Dims> empty;
-        w.GetResultCoverage(empty, touched_blocks);
+        w.GetResultCoverage(touched_blocks);
         ASSERT_EQ(touched_blocks.size(), rr[bpReader.CurrentStep()]);
         bpReader.EndStep();
     }
@@ -263,7 +261,7 @@ TEST_F(BPQueryTest, BP4)
     std::string engineName = "BP4";
     // Each process would write a 1x8 array and all processes would
     // form a mpiSize * Nx 1D array
-    const std::string fname(engineName + "4Query1D.bp");
+    const std::string fname(engineName + "Query1D.bp");
 
 #if ADIOS2_USE_MPI
     adios2::ADIOS adios(MPI_COMM_WORLD);