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<title>[25255] trunk: When `meta_type` is passed with `orderby => meta_value`, `orderby` must also use `CAST()` to avoid scenarios like: `SELECT`ing by `UNSIGNED` and then ordering by `CHAR`.</title>
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<dl class="meta">
<dt>Revision</dt> <dd><a href="http://core.trac.wordpress.org/changeset/25255">25255</a></dd>
<dt>Author</dt> <dd>wonderboymusic</dd>
<dt>Date</dt> <dd>2013-09-05 16:56:36 +0000 (Thu, 05 Sep 2013)</dd>
</dl>

<h3>Log Message</h3>
<pre>When `meta_type` is passed with `orderby => meta_value`, `orderby` must also use `CAST()` to avoid scenarios like: `SELECT`ing by `UNSIGNED` and then ordering by `CHAR`. Adds unit test.

Fixes <a href="http://core.trac.wordpress.org/ticket/21621">#21621</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesmetaphp">trunk/src/wp-includes/meta.php</a></li>
<li><a href="#trunksrcwpincludesqueryphp">trunk/src/wp-includes/query.php</a></li>
<li><a href="#trunktestsphpunittestsmetaphp">trunk/tests/phpunit/tests/meta.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesmetaphp"></a>
<div class="modfile"><h4>Modified: trunk/src/wp-includes/meta.php (25254 => 25255)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/src/wp-includes/meta.php   2013-09-05 16:33:50 UTC (rev 25254)
+++ trunk/src/wp-includes/meta.php      2013-09-05 16:56:36 UTC (rev 25255)
</span><span class="lines">@@ -604,6 +604,30 @@
</span><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> /**
</span><ins>+ * Given a meta type, return the appropriate alias if applicable
+ *
+ * @since 3.7.0
+ *
+ * @see WP_Meta_Query
+ *
+ * @param string $type MySQL type to cast meta_value
+ * @return string MySQL type
+ */
+function get_meta_type( $type = '' ) {
+       if ( empty( $type ) )
+               return 'CHAR';
+
+       $meta_type = strtoupper( $type );
+
+       if ( ! in_array( $meta_type, array( 'BINARY', 'CHAR', 'DATE', 'DATETIME', 'DECIMAL', 'SIGNED', 'TIME', 'UNSIGNED', 'NUMERIC' ) ) )
+               return 'CHAR';
+
+       if ( 'NUMERIC' == $meta_type )
+               $meta_type = 'SIGNED';
+
+       return $meta_type;
+}
+/**
</ins><span class="cx">  * Container class for a multiple metadata query
</span><span class="cx">  *
</span><span class="cx">  * @since 3.2.0
</span><span class="lines">@@ -744,13 +768,8 @@
</span><span class="cx"> 
</span><span class="cx">          foreach ( $queries as $k => $q ) {
</span><span class="cx">                  $meta_key = isset( $q['key'] ) ? trim( $q['key'] ) : '';
</span><del>-                       $meta_type = isset( $q['type'] ) ? strtoupper( $q['type'] ) : 'CHAR';
</del><ins>+                        $meta_type = get_meta_type( isset( $q['type'] ) ? $q['type'] : '' );
</ins><span class="cx"> 
</span><del>-                       if ( 'NUMERIC' == $meta_type )
-                               $meta_type = 'SIGNED';
-                       elseif ( ! in_array( $meta_type, array( 'BINARY', 'CHAR', 'DATE', 'DATETIME', 'DECIMAL', 'SIGNED', 'TIME', 'UNSIGNED' ) ) )
-                               $meta_type = 'CHAR';
-
</del><span class="cx">                   $meta_value = isset( $q['value'] ) ? $q['value'] : null;
</span><span class="cx"> 
</span><span class="cx">                  if ( isset( $q['compare'] ) )
</span></span></pre></div>
<a id="trunksrcwpincludesqueryphp"></a>
<div class="modfile"><h4>Modified: trunk/src/wp-includes/query.php (25254 => 25255)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/src/wp-includes/query.php  2013-09-05 16:33:50 UTC (rev 25254)
+++ trunk/src/wp-includes/query.php     2013-09-05 16:56:36 UTC (rev 25255)
</span><span class="lines">@@ -2420,7 +2420,12 @@
</span><span class="cx">                                          break;
</span><span class="cx">                                  case $q['meta_key']:
</span><span class="cx">                                  case 'meta_value':
</span><del>-                                               $orderby = "$wpdb->postmeta.meta_value";
</del><ins>+                                                if ( isset( $q['meta_type'] ) ) {
+                                                       $meta_type = get_meta_type( $q['meta_type'] );
+                                                       $orderby = "CAST($wpdb->postmeta.meta_value AS {$meta_type})";
+                                               } else {
+                                                       $orderby = "$wpdb->postmeta.meta_value";
+                                               }       
</ins><span class="cx">                                           break;
</span><span class="cx">                                  case 'meta_value_num':
</span><span class="cx">                                          $orderby = "$wpdb->postmeta.meta_value+0";
</span></span></pre></div>
<a id="trunktestsphpunittestsmetaphp"></a>
<div class="modfile"><h4>Modified: trunk/tests/phpunit/tests/meta.php (25254 => 25255)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/tests/phpunit/tests/meta.php       2013-09-05 16:33:50 UTC (rev 25254)
+++ trunk/tests/phpunit/tests/meta.php  2013-09-05 16:56:36 UTC (rev 25255)
</span><span class="lines">@@ -150,4 +150,25 @@
</span><span class="cx">          $this->assertInternalType( 'int', update_metadata( 'user', $this->author->ID, $key, $value2 ) );
</span><span class="cx">          $this->assertEquals( $expected2, get_metadata( 'user', $this->author->ID, $key, true ) );
</span><span class="cx">  }
</span><ins>+
+       function test_meta_type_cast() {
+               $post_id1 = $this->factory->post->create();
+               add_post_meta( $post_id1, 'num_as_longtext', 123 );
+               $post_id2 = $this->factory->post->create();
+               add_post_meta( $post_id2, 'num_as_longtext', 99 );
+
+               $posts = new WP_Query( array(
+                       'fields' => 'ids',
+                       'post_type' => 'any',
+                       'meta_key' => 'num_as_longtext',
+                       'meta_value' => '0',
+                       'meta_compare' => '>',
+                       'meta_type' => 'UNSIGNED',
+                       'orderby' => 'meta_value',
+                       'order' => 'ASC'
+               ) );
+
+               $this->assertEquals( array( $post_id2, $post_id1 ), $posts->posts );
+               $this->assertEquals( 2, substr_count( $posts->request, 'CAST(' ) );
+       }
</ins><span class="cx"> }
</span></span></pre>
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