private static String blobToString(byte[] blob) {
        if (blob.length <= MAX_BLOB_LENGTH) {
            if (fastIsAscii(blob)) {
                try {
                    return new String(blob, "US-ASCII");
                } catch (UnsupportedEncodingException ignore) {
                }
            }
        }
        return UNKNOWN_BLOB_LABEL;
    }
Label to use when a BLOB column cannot be converted to a string.
pandora-core/src/main/java/tech/linjiang/pandora/database/DatabaseResult.java