IOSS: Handle query timestep mode decomposition correctly

packages/seacas/libraries/ioss/src/exodus/Ioex_IOFactory.C

@@ -59,7 +59,7 @@ namespace Ioex {
     // The "exodus" and "parallel_exodus" databases can both be accessed
     // from this factory.  The "parallel_exodus" is returned only if the following
     // are true:
-    // 0. The db_usage is 'READ_MODEL' (not officially supported for READ_RESTART yet)
+    // 0. The db_usage is an input type.
     // 1. Parallel run with >1 processor
     // 2. There is a DECOMPOSITION_METHOD specified in 'properties'
     // 3. The decomposition method is not "EXTERNAL"
@@ -69,13 +69,13 @@ namespace Ioex {
 
     bool decompose = false;
     if (proc_count > 1) {
-      if (db_usage == Ioss::READ_MODEL || db_usage == Ioss::READ_RESTART) {
+      if (is_input_event(db_usage)) {
         std::string method = check_decomposition_property(properties, db_usage);
         if (!method.empty() && method != "EXTERNAL") {
           decompose = true;
         }
       }
-      else if (db_usage == Ioss::WRITE_RESULTS || db_usage == Ioss::WRITE_RESTART) {
+      else {
         if (check_composition_property(properties, db_usage)) {
           decompose = true;
         }
@@ -123,7 +123,7 @@ namespace {
     if (db_usage == Ioss::READ_MODEL) {
       decomp_property = "MODEL_DECOMPOSITION_METHOD";
     }
-    else if (db_usage == Ioss::READ_RESTART) {
+    else if (db_usage == Ioss::READ_RESTART || db_usage == Ioss::QUERY_TIMESTEPS_ONLY) {
       decomp_property = "RESTART_DECOMPOSITION_METHOD";
     }