presto-accumulo/src/main/java/io/prestosql/plugin/accumulo/index/IndexLookup.java/IndexLookup/smallestCardAboveThreshold
class IndexLookup:    private static boolean smallestCardAboveThreshold(ConnectorSession session, long numRows, long smallestCardinality)
    {
        double ratio = ((double) smallestCardinality / (double) numRows);
        double threshold = getIndexSmallCardThreshold(session);
        LOG.debug("Smallest cardinality is %d, num rows is %d, ratio is %2f with threshold of %f", smallestCardinality, numRows, ratio, threshold);
        return ratio > threshold;
    }