Ticket #41266: 41266.patch

src/wp-includes/class-wp-meta-query.php

@@ -95 +95 @@
         protected $has_or_relation = false;
 
         /**
+         * The default meta table alias.
+         *
+         * @var string
+         */
+        protected $default_meta_table_alias = 'mt';
+
+        /**
          * Constructor.
          *
          * @since 3.2.0
@@ -511 +518 @@
                 $alias = $this->find_compatible_table_alias( $clause, $parent_query );
                 if ( false === $alias ) {
                         $i = count( $this->table_aliases );
-                        $alias = $i ? 'mt' . $i : $this->meta_table;
+                        $alias = $i ? $this->default_meta_table_alias . $i : $this->meta_table;
 
                         // JOIN clauses for NOT EXISTS have their own syntax.
                         if ( 'NOT EXISTS' === $meta_compare ) {
@@ -727 +734 @@
         public function has_or_relation() {
                 return $this->has_or_relation;
         }
+
+        /**
+         * Sets default meta table alias.
+         *
+         * @param string $default_meta_table_alias The default meta table alias.
+         *
+         * @return void
+         */
+        public function set_default_meta_table_alias( $default_meta_table_alias ) {
+                $this->default_meta_table_alias = $default_meta_table_alias;
+        }
 }

tests/phpunit/tests/meta/query.php

@@ -884 +884 @@
 
                 $this->assertTrue( $q->has_or_relation() );
         }
+
+        /**
+         * Test that a custom default_meta_table_alias can be set.
+         * @ticket 41266
+         */
+        public function test_set_default_meta_table_alias() {
+                global $wpdb;
+
+                $query = new WP_Meta_Query();
+
+                $query->set_default_meta_table_alias( 'myalias' );
+
+                $the_complex_query[ 'meta_query' ] = array(
+                        array( 'key' => 'my_first_key', 'value' => 'my_amazing_value' ),
+                        array( 'key' => 'my_second_key', 'compare' => 'NOT EXISTS' ),
+                        array( 'key' => 'my_third_key', 'value' => array(), 'compare' => 'IN' ),
+                );
+
+                $query->parse_query_vars( $the_complex_query );
+
+                $sql = $query->get_sql( 'post', $wpdb->posts, 'ID', $this );
+
+                $this->assertContains( 'AS myalias1', $sql[ 'join' ] );
+                $this->assertContains( 'AS myalias2', $sql[ 'join' ] );
+        }
 }