Fix path reading

Author: franzpoeschel

src/IO/ADIOS/ADIOS2IOHandler.cpp

@@ -1591,6 +1591,9 @@ namespace
     };
 #endif
 
+#define OPENPMD_PREPARSE_EVERYTHING 1
+
+#if !OPENPMD_PREPARSE_EVERYTHING
     void warn_ignored_modifiable_attributes(adios2::IO &IO)
     {
         auto modifiable_flag = IO.InquireAttribute<detail::bool_representation>(
@@ -1612,10 +1615,9 @@ Use Access::READ_LINEAR to retrieve those values if needed.
             print_warning("File uses modifiable attributes.");
         }
     }
+#endif
 } // namespace
 
-#define OPENPMD_PREPARSE_EVERYTHING 1
-
 void ADIOS2IOHandlerImpl::readAttributeAllsteps(
     Writable *writable, Parameter<Operation::READ_ATT_ALLSTEPS> &param)
 {
@@ -1777,7 +1779,8 @@ void ADIOS2IOHandlerImpl::listPaths(
             std::vector attrs =
                 fileData.availableAttributesPrefixed(tablePrefix);
             if (fileData.streamStatus ==
-                detail::ADIOS2File::StreamStatus::DuringStep)
+                    detail::ADIOS2File::StreamStatus::DuringStep ||
+                fileData.stepSelection().has_value())
             {
                 auto currentStep = fileData.currentStep();
                 auto &IO = fileData.m_IO;

test/SerialIOTest.cpp

@@ -5971,13 +5971,12 @@ void variableBasedSeries(std::string const &file)
 
             last_iteration_index = iteration.iterationIndex;
 
-            if (access == Access::READ_RANDOM_ACCESS)
-            {
-                continue;
-            }
-
             // this loop ensures that only the recordcomponent ["E"]["i"] is
             // present where i == iteration.iterationIndex
+            // Note that this works for ReadRandomAccess as well since constant
+            // components contain no datasets. The ADIOS2 backend is however not
+            // (yet) able to deal with array datasets that are present only in a
+            // subselection of steps.
             for (uint64_t otherIteration = 0; otherIteration < 10;
                  ++otherIteration)
             {