From bbac0b673facbbb30b0d7733c86a332a4174d9b9 Mon Sep 17 00:00:00 2001
From: jsteemann <jan@arangodb.com>
Date: Fri, 15 Apr 2016 18:10:16 +0200
Subject: [PATCH] don't pull filters beyond modification nodes

---
 arangod/Aql/OptimizerRules.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arangod/Aql/OptimizerRules.cpp b/arangod/Aql/OptimizerRules.cpp
index 5633cf0996..bf4724c582 100644
--- a/arangod/Aql/OptimizerRules.cpp
+++ b/arangod/Aql/OptimizerRules.cpp
@@ -1268,6 +1268,11 @@ void arangodb::aql::moveFiltersUpRule(Optimizer* opt, ExecutionPlan* plan,
         // must not move a filter beyond a node that can throw
         break;
       }
+      
+      if (current->isModificationNode()) {
+        // must not move a filter beyond a modification node
+        break;
+      }
 
       if (current->getType() == EN::CALCULATION) {
         // must not move a filter beyond a node with a non-deterministic result