rdblue commented on a change in pull request #600: Implement in and notIn in
multiple visitors
URL: https://github.com/apache/incubator-iceberg/pull/600#discussion_r355148688
##########
File path:
api/src/main/java/org/apache/iceberg/expressions/InclusiveMetricsEvaluator.java
##########
@@ -269,11 +270,38 @@ public Boolean or(Boolean leftResult, Boolean
rightResult) {
@Override
public <T> Boolean in(BoundReference<T> ref, Set<T> literalSet) {
+ Integer id = ref.fieldId();
+
+ if (containsNullsOnly(id)) {
+ return ROWS_CANNOT_MATCH;
+ }
+
+ final Comparator<T> comparator = ((BoundSetPredicate<T>)
expr).comparator();
Review comment:
This can't use `expr` because that is the expression being evaluated. There
is no guarantee it is a bound set predicate.
Instead, I think this should add a `comparator()` method to `BoundReference`
because it is passed into all of these methods. That has a `type()` accessor
that you can use to get the comparator, like this:
```java
Comparator<T> comparator() {
return Comparators.forType(type().asPrimitiveType());
}
```
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