[wp-trac] [WordPress Trac] #60096: Remove back-compat for database servers that don't support utf8mb4

[WordPress Trac]

#60096: Remove back-compat for database servers that don't support utf8mb4
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 Reporter:  johnbillion               |       Owner:  johnbillion
     Type:  task (blessed)            |      Status:  assigned
 Priority:  normal                    |   Milestone:  6.6
Component:  Database                  |     Version:  trunk
 Severity:  normal                    |  Resolution:
 Keywords:  has-patch has-unit-tests  |     Focuses:
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Comment (by craigfrancis):

 While I've not checked the full patch, I'm happy with the removal because
 it's only doing version number checking - i.e. checking `5.5.3` or greater
 from `mysqli_get_server_info()` and `mysqli_get_client_info()` (with an
 exception for mysqlnd; 5.0.9).

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 Semi-related #58871, adding support for `utf8mb4_uca1400_ai_ci` (MariaDB)
 or `utf8mb4_0900_ai_ci` (MySQL), that's likely to get a bit more
 complicated, as we can't (as easily) use version number checking.

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Ticket URL: <https://core.trac.wordpress.org/ticket/60096#comment:5>
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