This works as expected on one machine:
mysql> SELECT `LengthSHOULD` FROM `LengthAndGrowing` WHERE `LenTmpPltzPerKEY`='InCompletedsLengthCheck_0';
+--------------+
| LengthSHOULD |
+--------------+
| A,B,C,D |
+--------------+
but on a different computer the same code is giving me this:
mysql> SELECT `LengthSHOULD` FROM `LengthAndGrowing` WHERE `LenTmpPltzPerKEY`='InCompletedsLengthCheck_0';
+----------------------------+
| LengthSHOULD |
+----------------------------+
| 0x412C422C432C44 |
+----------------------------+
0x41 2C 42 2C 43 2C 44 |||| Hunh : 0x 41 2C 42 2C 43 2C 44 ? , , ,
I have gotten this far... asking mysql about what it is using internally:
mysql> SELECT
-> column_name,
-> character_set_name,
-> collation_name
-> FROM information_schema.columns
-> WHERE table_name = 'LengthAndGrowing';
+------------------+--------------------+--------------------+
| COLUMN_NAME | CHARACTER_SET_NAME | COLLATION_NAME |
+------------------+--------------------+--------------------+
| LenTmpPltzPerKEY | utf8mb4 | utf8mb4_0900_ai_ci |
| LengthSHOULD | NULL | NULL |
| GrowingPains | utf8mb4 | utf8mb4_0900_ai_ci |
| AccordianString | NULL | NULL |
| TimePLEASE | utf8mb4 | utf8mb4_0900_ai_ci |
+------------------+--------------------+--------------------+
How should I proceed to unsnarl this?
From the hint in the answer from dcolazin, yep, it was the option --skip-binary-as-hex.
So apparently mysql 8.x+; things were made such that by default in for instance a bash shell and in the mysql running there, binary data returned by queries just gets splashed on the screen in hex.
I wound up creating under dir ~/ a new .my.cnf file and under group [mysql] and [mysqld] and for good measure [server-client] adding the option skip-binary-as-hex Useful resource: the SECTION "Option File Syntax" at MySQL Docs: https://dev.mysql.com/doc/refman/8.0/en/option-files.html#option-file-order
[mysql]
skip-binary-as-hex
[mysqld]
skip-binary-as-hex
[server-client]
skip-binary-as-hex
systemctl restart mysqld
mysql -u thisdelinquentuser -p
and get nice data again.
DBAABA,DBAABB,DBAABC,DBAABD, DBAACA,DBAACB,DBAACC,DBAACD, DBAADA,DBAADB,DBAADC,DBAADD,