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<title>[37606] branches/4.5: Database: `dbDelta()` will no longer try to downgrade the size of `TEXT` and `BLOB` 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/37606">37606</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/37606","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>ocean90</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2016-06-01 12:58:36 +0000 (Wed, 01 Jun 2016)</dd>
</dl>
<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Database: `dbDelta()` will no longer try to downgrade the size of `TEXT` and `BLOB` columns.
When upgrading to `utf8mb4`, `TEXT` fields will be upgraded to `MEDIUMTEXT` (and likewise for all other `*TEXT` and `*BLOB` fields). This is to allow for the additional space requirements of `utf8mb4`.
On the subsequent upgrade, after the `utf8mb4` upgrade, `dbDelta()` would try and downgrade the fields to their original size again. At best, this it a waste of time, at worst, this could truncate any data larger than the original size. There's no harm in leaving them at their original size, so let's do that.
Merge of <a href="https://core.trac.wordpress.org/changeset/37525">[37525]</a> to the 4.5 branch.
Props pento.
See <a href="https://core.trac.wordpress.org/ticket/36748">#36748</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#branches45srcwpadminincludesupgradephp">branches/4.5/src/wp-admin/includes/upgrade.php</a></li>
<li><a href="#branches45testsphpunittestsdbdeltaphp">branches/4.5/tests/phpunit/tests/dbdelta.php</a></li>
</ul>
<h3>Property Changed</h3>
<ul>
<li><a href="#branches45">branches/4.5/</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<span class="cx" style="display: block; padding: 0 10px">Index: branches/4.5
</span><span class="cx" style="display: block; padding: 0 10px">===================================================================
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">--- branches/4.5 2016-06-01 12:31:17 UTC (rev 37605)
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+++ branches/4.5 2016-06-01 12:58:36 UTC (rev 37606)
</ins><a id="branches45"></a>
<div class="propset"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Property changes: branches/4.5</h4>
<pre class="diff"><span>
</span></pre></div>
<a id="svnmergeinfo"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: svn:mergeinfo</h4></div>
<span class="cx" style="display: block; padding: 0 10px"> /branches/3.1:18031
</span><span class="cx" style="display: block; padding: 0 10px"> /branches/3.3:20543
</span><span class="cx" style="display: block; padding: 0 10px"> /branches/3.4:21757
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-/trunk:18512,37192,37228,37247,37249,37273,37282,37285,37288,37301,37352,37417,37433,37435,37448,37452,37472,37526,37559
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/trunk:18512,37192,37228,37247,37249,37273,37282,37285,37288,37301,37352,37417,37433,37435,37448,37452,37472,37525-37526,37559
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="branches45srcwpadminincludesupgradephp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/4.5/src/wp-admin/includes/upgrade.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/4.5/src/wp-admin/includes/upgrade.php 2016-06-01 12:31:17 UTC (rev 37605)
+++ branches/4.5/src/wp-admin/includes/upgrade.php 2016-06-01 12:58:36 UTC (rev 37606)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2154,6 +2154,9 @@
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> $iqueries = apply_filters( 'dbdelta_insert_queries', $iqueries );
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $text_fields = array( 'tinytext', 'text', 'mediumtext', 'longtext' );
+ $blob_fields = array( 'tinyblob', 'blob', 'mediumblob', 'longblob' );
+
</ins><span class="cx" style="display: block; padding: 0 10px"> $global_tables = $wpdb->tables( 'global' );
</span><span class="cx" style="display: block; padding: 0 10px"> foreach ( $cqueries as $table => $qry ) {
</span><span class="cx" style="display: block; padding: 0 10px"> // Upgrade global tables only for the main site. Don't upgrade at all if conditions are not optimal.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2223,9 +2226,24 @@
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> // Is actual field type different from the field type in query?
</span><span class="cx" style="display: block; padding: 0 10px"> if ($tablefield->Type != $fieldtype) {
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $do_change = true;
+ if ( in_array( strtolower( $fieldtype ), $text_fields ) && in_array( strtolower( $tablefield->Type ), $text_fields ) ) {
+ if ( array_search( strtolower( $fieldtype ), $text_fields ) < array_search( strtolower( $tablefield->Type ), $text_fields ) ) {
+ $do_change = false;
+ }
+ }
+
+ if ( in_array( strtolower( $fieldtype ), $blob_fields ) && in_array( strtolower( $tablefield->Type ), $blob_fields ) ) {
+ if ( array_search( strtolower( $fieldtype ), $blob_fields ) < array_search( strtolower( $tablefield->Type ), $blob_fields ) ) {
+ $do_change = false;
+ }
+ }
+
+ if ( $do_change ) {
</ins><span class="cx" style="display: block; padding: 0 10px"> // Add a query to change the column type
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $cqueries[] = "ALTER TABLE {$table} CHANGE COLUMN {$tablefield->Field} " . $cfields[strtolower($tablefield->Field)];
- $for_update[$table.'.'.$tablefield->Field] = "Changed type of {$table}.{$tablefield->Field} from {$tablefield->Type} to {$fieldtype}";
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $cqueries[] = "ALTER TABLE {$table} CHANGE COLUMN {$tablefield->Field} " . $cfields[strtolower($tablefield->Field)];
+ $for_update[$table.'.'.$tablefield->Field] = "Changed type of {$table}.{$tablefield->Field} from {$tablefield->Type} to {$fieldtype}";
+ }
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> // Get the default value from the array
</span></span></pre></div>
<a id="branches45testsphpunittestsdbdeltaphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/4.5/tests/phpunit/tests/dbdelta.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/4.5/tests/phpunit/tests/dbdelta.php 2016-06-01 12:31:17 UTC (rev 37605)
+++ branches/4.5/tests/phpunit/tests/dbdelta.php 2016-06-01 12:58:36 UTC (rev 37606)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -31,6 +31,8 @@
</span><span class="cx" style="display: block; padding: 0 10px"> CREATE TABLE {$wpdb->prefix}dbdelta_test (
</span><span class="cx" style="display: block; padding: 0 10px"> id bigint(20) NOT NULL AUTO_INCREMENT,
</span><span class="cx" style="display: block; padding: 0 10px"> column_1 varchar(255) NOT NULL,
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ column_2 text,
+ column_3 blob,
</ins><span class="cx" style="display: block; padding: 0 10px"> PRIMARY KEY (id),
</span><span class="cx" style="display: block; padding: 0 10px"> KEY key_1 (column_1),
</span><span class="cx" style="display: block; padding: 0 10px"> KEY compound_key (id,column_1),
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -362,4 +364,104 @@
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> $this->assertSame( array(), $actual );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+ /**
+ * @ticket 36748
+ */
+ function test_dont_downsize_text_fields() {
+ global $wpdb;
+
+ $result = dbDelta(
+ "
+ CREATE TABLE {$wpdb->prefix}dbdelta_test (
+ id bigint(20) NOT NULL AUTO_INCREMENT,
+ column_1 varchar(255) NOT NULL,
+ column_2 tinytext,
+ column_3 blob,
+ PRIMARY KEY (id),
+ KEY key_1 (column_1),
+ KEY compound_key (id,column_1),
+ FULLTEXT KEY fulltext_key (column_1)
+ ) ENGINE=MyISAM
+ ", false );
+
+ $this->assertSame( array(), $result );
+ }
+
+ /**
+ * @ticket 36748
+ */
+ function test_dont_downsize_blob_fields() {
+ global $wpdb;
+
+ $result = dbDelta(
+ "
+ CREATE TABLE {$wpdb->prefix}dbdelta_test (
+ id bigint(20) NOT NULL AUTO_INCREMENT,
+ column_1 varchar(255) NOT NULL,
+ column_2 text,
+ column_3 tinyblob,
+ PRIMARY KEY (id),
+ KEY key_1 (column_1),
+ KEY compound_key (id,column_1),
+ FULLTEXT KEY fulltext_key (column_1)
+ ) ENGINE=MyISAM
+ ", false );
+
+ $this->assertSame( array(), $result );
+ }
+
+ /**
+ * @ticket 36748
+ */
+ function test_upsize_text_fields() {
+ global $wpdb;
+
+ $result = dbDelta(
+ "
+ CREATE TABLE {$wpdb->prefix}dbdelta_test (
+ id bigint(20) NOT NULL AUTO_INCREMENT,
+ column_1 varchar(255) NOT NULL,
+ column_2 bigtext,
+ column_3 blob,
+ PRIMARY KEY (id),
+ KEY key_1 (column_1),
+ KEY compound_key (id,column_1),
+ FULLTEXT KEY fulltext_key (column_1)
+ ) ENGINE=MyISAM
+ ", false );
+
+ $this->assertSame(
+ array(
+ "{$wpdb->prefix}dbdelta_test.column_2"
+ => "Changed type of {$wpdb->prefix}dbdelta_test.column_2 from text to bigtext"
+ ), $result );
+ }
+
+ /**
+ * @ticket 36748
+ */
+ function test_upsize_blob_fields() {
+ global $wpdb;
+
+ $result = dbDelta(
+ "
+ CREATE TABLE {$wpdb->prefix}dbdelta_test (
+ id bigint(20) NOT NULL AUTO_INCREMENT,
+ column_1 varchar(255) NOT NULL,
+ column_2 text,
+ column_3 mediumblob,
+ PRIMARY KEY (id),
+ KEY key_1 (column_1),
+ KEY compound_key (id,column_1),
+ FULLTEXT KEY fulltext_key (column_1)
+ ) ENGINE=MyISAM
+ ", false );
+
+ $this->assertSame(
+ array(
+ "{$wpdb->prefix}dbdelta_test.column_3"
+ => "Changed type of {$wpdb->prefix}dbdelta_test.column_3 from blob to mediumblob"
+ ), $result );
+ }
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre>
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