smart join views (#10309)

.editorconfig

@@ -5,6 +5,7 @@ root = true
 
 # Unix-style newlines with a newline ending every file
 [*]
+indent_size = 2
 end_of_line = lf
 insert_final_newline = true
 

CHANGELOG

@@ -1,6 +1,10 @@
 devel
 -----
 
+* Added "SmartJoins for Views" to the ArangoDB Enterprise Edition that allows running
+  cluster joins between two certain sharded collections or views with performance close
+  to that of a local join operation.
+
 * Allow collection names to be at most 256 characters long, instead of 64 characters
   in previous versions.
 

arangod/Aql/OptimizerRulesFeature.cpp

@@ -330,15 +330,15 @@ void OptimizerRulesFeature::addRules() {
                                         OptimizerRule::Flags::ClusterOnly));
 #endif
 
-  // distribute operations in cluster
-  registerRule("scatter-in-cluster", scatterInClusterRule, OptimizerRule::scatterInClusterRule,
-               OptimizerRule::makeFlags(OptimizerRule::Flags::ClusterOnly));
-
   // distribute view queries in cluster
   registerRule("scatter-arangosearch-view-in-cluster", arangodb::iresearch::scatterViewInClusterRule,
                OptimizerRule::scatterIResearchViewInClusterRule,
                OptimizerRule::makeFlags(OptimizerRule::Flags::ClusterOnly));
 
+  // distribute operations in cluster
+  registerRule("scatter-in-cluster", scatterInClusterRule, OptimizerRule::scatterInClusterRule,
+               OptimizerRule::makeFlags(OptimizerRule::Flags::ClusterOnly));
+
   // distribute operations in cluster
   registerRule("distribute-filtercalc-to-cluster", distributeFilternCalcToClusterRule,
                OptimizerRule::distributeFilternCalcToClusterRule,