[wp-trac] [WordPress Trac] #33501: Starting w/ WP4.2, upgrade scenario may fail for non-MySQL installs

[WordPress Trac]

#33501: Starting w/ WP4.2, upgrade scenario may fail for non-MySQL installs
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 Reporter:  RSkoon        |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Database      |     Version:  4.1.2
 Severity:  normal        |  Resolution:
 Keywords:  has-patch     |     Focuses:
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Changes (by dd32):

 * milestone:   => Awaiting Review


Comment:

 See #18176 for original implementation.

 Based on that, it looks like DB dropins were supposed to declare
 themselves as mysql, with `wpdb::db_connect()` doing it for them (for
 back-compat).
 That would suggest that a `if ( empty( $wpdb->is_mysql ) )` would be the
 right check IMHO.

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Ticket URL: <https://core.trac.wordpress.org/ticket/33501#comment:14>
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