Bugfix in the multiplicity computation of OptionalJoin (#484)

It was a not-so-easy to find copy&paste bug
ad-freiburg · Sep 27, 2021 · 70e3692 · 70e3692
1 parent 3b9bba0
commit 70e3692
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/engine/OptionalJoin.cpp b/src/engine/OptionalJoin.cpp
@@ -228,7 +228,8 @@ void OptionalJoin::computeSizeEstimateAndMultiplicities() {
   float multRight = std::numeric_limits<float>::max();
   for (size_t i = 0; i < _joinColumns.size(); i++) {
     multLeft = std::min(multLeft, _left->getMultiplicity(_joinColumns[i][0]));
-    multRight = std::min(multLeft, _left->getMultiplicity(_joinColumns[i][1]));
+    multRight =
+        std::min(multRight, _right->getMultiplicity(_joinColumns[i][1]));
   }
   float multResult = multLeft * multRight;