Replace room_hash with human-readable room column in sync_updates table

Store the room identifier string directly instead of its md5 hash.
Room strings like "postType/post:42" are short, already validated by
the REST API schema, and storing them verbatim improves debuggability.

Author: josephfusco

src/wp-admin/includes/schema.php

@@ -189,11 +189,11 @@ function wp_get_db_schema( $scope = 'all', $blog_id = null ) {
 ) $charset_collate;
 CREATE TABLE $wpdb->sync_updates (
 	id bigint(20) unsigned NOT NULL auto_increment,
-	room_hash char(32) NOT NULL,
+	room varchar(255) NOT NULL,
 	update_value longtext NOT NULL,
 	created_at datetime NOT NULL default '0000-00-00 00:00:00',
 	PRIMARY KEY  (id),
-	KEY room_hash (room_hash,id)
+	KEY room (room,id)
 ) $charset_collate;\n";
 
 	// Single site users table. The multisite flavor of the users table is handled below.

src/wp-admin/includes/upgrade.php

@@ -886,7 +886,7 @@ function upgrade_all() {
 		upgrade_682();
 	}
 
-	if ( $wp_current_db_version < 61697 ) {
+	if ( $wp_current_db_version < 61698 ) {
 		upgrade_700();
 	}
 

src/wp-includes/collaboration/class-wp-sync-table-storage.php

@@ -49,7 +49,7 @@ public function add_update( string $room, $update ): bool {
 		$result = $wpdb->insert(
 			$wpdb->sync_updates,
 			array(
-				'room_hash'    => md5( $room ),
+				'room'         => $room,
 				'update_value' => wp_json_encode( $update ),
 				'created_at'   => current_time( 'mysql', true ),
 			),
@@ -71,7 +71,7 @@ public function add_update( string $room, $update ): bool {
 	 * @return array<int, mixed> Awareness state.
 	 */
 	public function get_awareness_state( string $room ): array {
-		$awareness = get_transient( 'sync_awareness_' . md5( $room ) );
+		$awareness = get_transient( 'sync_awareness_' . $room );
 
 		if ( ! is_array( $awareness ) ) {
 			return array();
@@ -125,13 +125,11 @@ public function get_update_count( string $room ): int {
 	public function get_updates_after_cursor( string $room, int $cursor ): array {
 		global $wpdb;
 
-		$room_hash = md5( $room );
-
 		// Snapshot the current max ID for this room to define a stable upper bound.
 		$max_id = (int) $wpdb->get_var(
 			$wpdb->prepare(
-				"SELECT COALESCE( MAX( id ), 0 ) FROM {$wpdb->sync_updates} WHERE room_hash = %s",
-				$room_hash
+				"SELECT COALESCE( MAX( id ), 0 ) FROM {$wpdb->sync_updates} WHERE room = %s",
+				$room
 			)
 		);
 
@@ -146,17 +144,17 @@ public function get_updates_after_cursor( string $room, int $cursor ): array {
 		// Bounded by max_id to stay consistent with the snapshot window above.
 		$this->room_update_counts[ $room ] = (int) $wpdb->get_var(
 			$wpdb->prepare(
-				"SELECT COUNT(*) FROM {$wpdb->sync_updates} WHERE room_hash = %s AND id <= %d",
-				$room_hash,
+				"SELECT COUNT(*) FROM {$wpdb->sync_updates} WHERE room = %s AND id <= %d",
+				$room,
 				$max_id
 			)
 		);
 
 		// Fetch updates after the cursor up to the snapshot boundary.
 		$rows = $wpdb->get_results(
 			$wpdb->prepare(
-				"SELECT update_value FROM {$wpdb->sync_updates} WHERE room_hash = %s AND id > %d AND id <= %d ORDER BY id ASC",
-				$room_hash,
+				"SELECT update_value FROM {$wpdb->sync_updates} WHERE room = %s AND id > %d AND id <= %d ORDER BY id ASC",
+				$room,
 				$cursor,
 				$max_id
 			)
@@ -193,8 +191,8 @@ public function remove_updates_before_cursor( string $room, int $cursor ): bool
 
 		$result = $wpdb->query(
 			$wpdb->prepare(
-				"DELETE FROM {$wpdb->sync_updates} WHERE room_hash = %s AND id < %d",
-				md5( $room ),
+				"DELETE FROM {$wpdb->sync_updates} WHERE room = %s AND id < %d",
+				$room,
 				$cursor
 			)
 		);
@@ -216,6 +214,6 @@ public function remove_updates_before_cursor( string $room, int $cursor ): bool
 	public function set_awareness_state( string $room, array $awareness ): bool {
 		// Awareness is high-frequency, short-lived data (cursor positions, selections)
 		// that doesn't need cursor-based history. Transients avoid row churn in the table.
-		return set_transient( 'sync_awareness_' . md5( $room ), $awareness, MINUTE_IN_SECONDS );
+		return set_transient( 'sync_awareness_' . $room, $awareness, MINUTE_IN_SECONDS );
 	}
 }

src/wp-includes/rest-api.php

@@ -430,7 +430,7 @@ function create_initial_rest_routes() {
 	$icons_controller->register_routes();
 
 	// Collaboration.
-	if ( get_option( 'wp_enable_real_time_collaboration' ) && get_option( 'db_version' ) >= 61697 ) {
+	if ( get_option( 'wp_enable_real_time_collaboration' ) && get_option( 'db_version' ) >= 61698 ) {
 		$sync_storage = new WP_Sync_Table_Storage();
 
 		/**

src/wp-includes/version.php

@@ -23,7 +23,7 @@
  *
  * @global int $wp_db_version
  */
-$wp_db_version = 61697;
+$wp_db_version = 61698;
 
 /**
  * Holds the TinyMCE version.