HPCC-13102 Regress HPCC-9577 so conditional subgraphs are not merged

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>

ecl/hqlcpp/hqlcpp.cpp

@@ -1731,6 +1731,7 @@ void HqlCppTranslator::cacheOptions()
         DebugOption(options.optimizeMax,"optimizeMax",false),
         DebugOption(options.useResultsForChildSpills,"useResultsForChildSpills",false),
         DebugOption(options.alwaysUseGraphResults,"alwaysUseGraphResults",false),
+        DebugOption(options.noConditionalLinks,"noConditionalLinks",false),
         DebugOption(options.reportAssertFilenameTail,"reportAssertFilenameTail",false),        
     };
 

ecl/hqlcpp/hqlcpp.ipp

@@ -733,6 +733,7 @@ struct HqlCppOptions
     bool                optimizeMax;
     bool                useResultsForChildSpills;
     bool                alwaysUseGraphResults;
+    bool                noConditionalLinks;
     bool                reportAssertFilenameTail;
 };
 

ecl/hqlcpp/hqlresource.cpp

@@ -1897,7 +1897,7 @@ EclResourcer::EclResourcer(IErrorReceiver & _errors, IConstWorkUnit * _wu, Clust
     options.minimiseSpills = _translatorOptions.minimiseSpills;
     spillMultiCondition = _translatorOptions.spillMultiCondition;
     spotThroughAggregate = _translatorOptions.spotThroughAggregate && (targetClusterType != RoxieCluster) && (targetClusterType != ThorLCRCluster);
-    options.noConditionalLinks = (targetClusterType != HThorCluster);
+    options.noConditionalLinks = (targetClusterType == RoxieCluster) || ((targetClusterType != HThorCluster) && _translatorOptions.noConditionalLinks);
     options.hoistResourced = _translatorOptions.hoistResourced;
     options.alwaysUseGraphResults = _translatorOptions.alwaysUseGraphResults;
     options.useGraphResults = false;        // modified by later call