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Upgrades: If a table has already been converted to `utf8mb4`, there's no need to try and convert it again. 

Props gabrielperezs for the initial patch.

Merge of [32456] to the 4.2 branch.

Fixes #32310.


Built from https://develop.svn.wordpress.org/branches/4.2@32457


git-svn-id: http://core.svn.wordpress.org/branches/4.2@32427 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Gary Pendergast 2015-05-08 12:28:28 +00:00
parent 1ee5e6c4dd
commit ca13bd76d5
1 changed files with 11 additions and 0 deletions
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11
wp-admin/includes/upgrade.php
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@ -1759,6 +1759,17 @@ function maybe_convert_table_to_utf8mb4( $table ) {
}
}
$table_details = $wpdb->get_row( "SHOW TABLE STATUS LIKE '$table'" );
if ( ! $table_details ) {
return false;
}
list( $table_charset ) = explode( '_', $table_details->Collation );
$table_charset = strtolower( $table_charset );
if ( 'utf8mb4' === $table_charset ) {
return true;
}
return $wpdb->query( "ALTER TABLE $table CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci" );
}