Make sure MySQL is not saying 'this' = 'this ' is true

[nickvergessen]

🍿🍿🍿🍿🍿🍿🍿🍿🍿🍿
🍿🍿🍿🍿🍿🍿🍿🍿🍿🍿
🍿🍿🍿🍿🍿🍿🍿🍿🍿🍿
🍿🍿🍿🍿🍿🍿🍿🍿🍿🍿
🍿🍿🍿🍿🍿🍿🍿🍿🍿🍿
🍿🍿🍿🍿🍿🍿🍿🍿🍿🍿
🍿🍿🍿🍿🍿🍿🍿🍿🍿🍿
🍿🍿🍿🍿🍿🍿🍿🍿🍿🍿
🍿🍿🍿🍿🍿🍿🍿🍿🍿🍿
🍿🍿🍿🍿🍿🍿🍿🍿🍿🍿

100 popcorn, take one and have a look while I perform a magic trick:

SELECT 'jan' = 'jan ', BINARY 'jan' = 'jan ';
+----------------+-----------------------+
| 'jan' = 'jan ' | BINARY 'jan' = 'jan ' |
+----------------+-----------------------+
|              1 |                     0 |
+----------------+-----------------------+

[gary-kim]

Tried testing and to add to the amusement,

MySQL 5.7

mysql> SELECT 'jan' = 'jan ', BINARY 'jan' = 'jan ';
+----------------+-----------------------+
| 'jan' = 'jan ' | BINARY 'jan' = 'jan ' |
+----------------+-----------------------+
|              1 |                     0 |
+----------------+-----------------------+
1 row in set (0.00 sec)

MySQL 8

mysql> SELECT 'jan' = 'jan ', BINARY 'jan' = 'jan ';
+----------------+-----------------------+
| 'jan' = 'jan ' | BINARY 'jan' = 'jan ' |
+----------------+-----------------------+
|              0 |                     0 |
+----------------+-----------------------+
1 row in set (0.00 sec)

[nickvergessen]

Okay, so they fixed it for mysql8 on your machine? Im pretty sure I have 8 too locally and I could reproduce it there

[gary-kim]

I just tested on mysql:8 on Docker Hub, 8.0.19-0ubuntu0.19.10.3 on Ubuntu, and 8.0.17 Source distribution on RHEL 8 and they all seem to return the proper value.

mysql:5.7 on Docker Hub has the issue though.

[nickvergessen]

Okay, seems to be the case for me now too.

MariaDB seems to be affected:

MariaDB [(none)]> SELECT 'jan' = 'jan ', BINARY 'jan' = 'jan ';
+----------------+-----------------------+
| 'jan' = 'jan ' | BINARY 'jan' = 'jan ' |
+----------------+-----------------------+
|              1 |                     0 |
+----------------+-----------------------+
1 row in set (0.00 sec)

MariaDB [(none)]> SELECT VERSION();
+----------------------------------+
| VERSION()                        |
+----------------------------------+
| 10.1.44-MariaDB-0ubuntu0.18.04.1 |
+----------------------------------+
1 row in set (0.00 sec)

[MorrisJobke]

Code makes sense 👍

[MorrisJobke]

Conflicts :/

[MorrisJobke]

Conflicts :/

Let me fix them.

[rullzer]

Basically this made my production instance do boom... I'll have to see why... but for now we can't really release beta3 with this...