Ticket #42151: 42151.2.diff

src/wp-includes/wp-db.php

@@ -1887 +1887 @@
                 $this->num_queries++;
 
                 if ( defined( 'SAVEQUERIES' ) && SAVEQUERIES ) {
-                        $this->queries[] = array( $query, $this->timer_stop(), $this->get_caller() );
+                        /**
+                         * Filters the empty query data parameter to allow custom data to be added.
+                         * All values added to this array should be in the form of associative 
+                         * array elements.
+                         *
+                         * @since 4.9.0
+                         *
+                         * @param array  Custom data associated with the currently run query.
+                         */
+                        $this->queries[] = array(
+                                $query,
+                                $this->timer_stop(),
+                                $this->get_caller(),
+                                apply_filters( 'savequeries_add_querydata', array() ),
+                        );
                 }
         }