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<title>[31354] trunk/src/wp-admin/includes/upgrade.php: Upgrades: When upgrading a table to utf8mb4, we should run the `ALTER TABLE` query, even if it doesn't have any text columns.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/31354">31354</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/31354","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>pento</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2015-02-06 05:58:15 +0000 (Fri, 06 Feb 2015)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Upgrades: When upgrading a table to utf8mb4, we should run the `ALTER TABLE` query, even if it doesn't have any text columns. This will update the table's default character set, so that any text columns added in the future will have the expected character set.
See <a href="https://core.trac.wordpress.org/ticket/21212">#21212</a> </pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpadminincludesupgradephp">trunk/src/wp-admin/includes/upgrade.php</a></li>
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<h3>Diff</h3>
<a id="trunksrcwpadminincludesupgradephp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/includes/upgrade.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/includes/upgrade.php 2015-02-06 05:57:54 UTC (rev 31353)
+++ trunk/src/wp-admin/includes/upgrade.php 2015-02-06 05:58:15 UTC (rev 31354)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1662,25 +1662,17 @@
</span><span class="cx" style="display: block; padding: 0 10px"> return false;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $has_utf8 = false;
</del><span class="cx" style="display: block; padding: 0 10px"> foreach ( $results as $column ) {
</span><span class="cx" style="display: block; padding: 0 10px"> if ( $column->Collation ) {
</span><span class="cx" style="display: block; padding: 0 10px"> list( $charset ) = explode( '_', $column->Collation );
</span><span class="cx" style="display: block; padding: 0 10px"> $charset = strtolower( $charset );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( 'utf8' === $charset ) {
- $has_utf8 = true;
- } elseif ( 'utf8mb4' !== $charset ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( 'utf8' !== $charset && 'utf8mb4' !== $charset ) {
</ins><span class="cx" style="display: block; padding: 0 10px"> // Don't upgrade tables that have non-utf8 columns.
</span><span class="cx" style="display: block; padding: 0 10px"> return false;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( ! $has_utf8 ) {
- // Don't bother upgrading tables that don't have utf8 columns.
- return false;
- }
-
</del><span class="cx" style="display: block; padding: 0 10px"> return $wpdb->query( "ALTER TABLE $table CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci" );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span></span></pre>
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