juripetersen opened a new issue, #634:
URL: https://github.com/apache/incubator-wayang/issues/634
Using Wayangs default enumeration and pruning strategies, the plans compared
in cost models are non-deterministic.
This can be observed when comparing costs with different mechanisms:
```java
final PlanImplementation bestPlanImplementation =
executionPlans.stream()
.reduce((p1, p2) -> {
final double t1 = p1.getSquashedCostEstimate();
final double t2 = p2.getSquashedCostEstimate();
return t1 < t2 ? p1 : p2;
})
```
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