presto-jdbc/src/main/java/io/prestosql/jdbc/PrestoDatabaseMetaData.java/PrestoDatabaseMetaData/emptyStringLikeFilter
class PrestoDatabaseMetaData:    private static void emptyStringLikeFilter(List<String> filters, String columnName, String value)
    {
        if (value != null) {
            if (value.isEmpty()) {
                filters.add(columnName + " IS NULL");
            }
            else {
                filters.add(stringColumnLike(columnName, value));
            }
        }
    }