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