Case-sensitive comparison of string literal

[andy-wm-arthur]

repro:

SELECT HEX(UNHEX('c0a80000')) = 'c0a80000', HEX(UNHEX('c0a80000'));

MySQL:

mysql> select HEX(UNHEX('c0a80000')) = 'c0a80000', HEX(UNHEX('c0a80000'));
+-------------------------------------+------------------------+
| HEX(UNHEX('c0a80000')) = 'c0a80000' | HEX(UNHEX('c0a80000')) |
+-------------------------------------+------------------------+
|                                   1 | C0A80000               |
+-------------------------------------+------------------------+
1 row in set (0.00 sec)

1 row in set (0.00 sec)

go-mysql-server (Dolt)

tmp> select HEX(UNHEX('c0a80000')) = 'c0a80000', HEX(UNHEX('c0a80000'));
+-------------------------------------+------------------------+
| HEX(UNHEX('c0a80000')) = 'c0a80000' | HEX(UNHEX('c0a80000')) |
+-------------------------------------+------------------------+
| false                               | C0A80000               |
+-------------------------------------+------------------------+

[andy-wm-arthur]

Another example, also from nautobot:

mysql> insert into coll values (1,'ABC');
Query OK, 1 row affected (0.04 sec)

mysql> select * from coll where c0 like 'abc';
+----+------+
| pk | c0   |
+----+------+
|  1 | ABC  |
+----+------+
1 row in set (0.00 sec)

[Hydrocharged]

Both issues fixed as of #1252