WordPress.org

1.1

• Extended callbacks functionality
• Added connection error callback
• Added replication lag detection support

1.0

• Removed support for WPMU and BackPress.
• New class with inheritance: hyperdb extends wpdb.
• New instantiation scheme: $wpdb = new hyperdb(); then include config. No more $db_* globals.
• New configuration file name (db-config.php) and logic for locating it. (ABSPATH, dirname(ABSPATH), or pre-defined)
• Added fallback to wpdb in case database config not found.
• Renamed servers to databases in config in an attempt to reduce ambiguity.
• Added config interface functions to hyperdb: add_database, add_table, add_callback.
• Refactored db_server array to simplify finding a server.
• Removed native support for datacenters and partitions. The same effects are accomplished by read/write parameters and dataset names.
• Removed preg pattern support from $db_tables. Use callbacks instead.
• Removed delay between connection retries and avoid immediate retry of same server when others are available to try.
• Added connection stats.
• Added save_query_callback for custom debug logging.
• Refined SRTM granularity. Now only send reads to masters when the written table is involved.
• Improved connection reuse logic and added mysql_ping to recover from "server has gone away".
• Added min_tries to configure the minimum number of connection attempts before bailing.
• Added WPDB_PATH constant. Define this if you'd rather not use ABSPATH . WPINC . '/wp-db.php'.