[wp-trac] [WordPress Trac] #21212: MySQL tables should use utf8mb4 character set

[WordPress Trac]

#21212: MySQL tables should use utf8mb4 character set
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 Reporter:  pento           |       Owner:
     Type:  task (blessed)  |      Status:  reopened
 Priority:  normal          |   Milestone:  4.2
Component:  Database        |     Version:  3.4.1
 Severity:  normal          |  Resolution:
 Keywords:  has-patch       |     Focuses:
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Comment (by pento):

 [attachment:21212-utf8mb4.7.diff] moves all of the index changes into
 single queries for each table, rather than relying on `dbDelta()` to
 create the new indexes.

 It also adds sanity checking to Multisite upgrades, so that we're not
 trying to upgrade any non-utf8 charsets.

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Ticket URL: <https://core.trac.wordpress.org/ticket/21212#comment:77>
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