vitess-gh/doc/releasenotes/7_0_1_release_notes.md

This update fixes several regressions that were deemed significant enough to be backported to the release branch. In addition, the experimental feature to set system variables is now behind a flag that disables it by default.

Configuration Changes

• Vtgate: added flag enable_system_settings to enable passthrough system settings, defaults to false #6562

Bugs Fixed

• Vreplication: Materialize should only get schema from source tablets if target is missing tables #6623
• Vtctld UI: mysql port is not displayed in tablet list #6597 #6600
• Vtgate: transaction killer was closing reserved connection after the specified time. Only idle connections should be closed. Idle transactions should be rolled back. #6583
• Vtcompose: docker-compose example was broken by tabletmanager changes #6587
• Vreplication: tablet_picker should respect canceled context. Also, keep trying to find a tablet until context expires. #6567
• Vtgate: vindex update/delete by destination #6541 #6572
• Vtgate: some usages of EXPLAIN were broken #6574 #6581
• Vtgate: handle multiple settings in single SET statement #6504
• Vtgate: cleanup shard session for reserved connection on failure #6563
• Vtgate: if executing DDL on reserved connection, start transaction if needed #6555
• Vtgate: make sure lookup vindexes use same transaction if one is open #6505
• Healthcheck: add diagnostic logging, do not add tablet if it is shutting down #6512