Ticket #26937: 26937.12.patch

src/wp-includes/link-template.php

@@ -1436 +1436 @@
                         $clauses      = array_merge( $clauses, $sort_clauses );
                 }
 
+                /**
+                 * Posts table was aliased as `p` for backwards compatibility during legacy filter application.
+                 * As `WP_Query` expects the posts table to be referenced as the value stored in `$wpdb->posts`, we must remove the aliasing.
+                 */
+                $clauses['join'] = str_replace( 'AS p ', '', $clauses['join'] );
+                $clauses = array_map( array( $this, 'restore_posts_table' ), $clauses );
+
                 return $clauses;
         }
 
@@ -1453 +1460 @@
         }
 
         /**
+         * Restore posts table to the value from `$wpdb`, as expected by `WP_Query`
+         *
+         * @global $wpdb
+         * @param string  Clause to unalias
+         * @return string
+         */
+        protected function restore_posts_table( $clause ) {
+                global $wpdb;
+
+                return preg_replace( '#\bp\b#', "{$wpdb->posts}", $clause );
+        }
+
+        /**
          * Apply the deprecated `join` clause filter to the clause built by WP_Query.
          *
          * @param string $join