presto-main/src/main/java/io/prestosql/sql/planner/EqualityInference.java/EqualityInference/nonInferrableConjuncts
class EqualityInference:    public static List<Expression> nonInferrableConjuncts(Metadata metadata, Expression expression)
    {
        return extractConjuncts(expression).stream()
            .filter(e -> !isInferenceCandidate(metadata, e))
            .collect(Collectors.toList());
    }