Last week, we landed 27 PRs in the TiDB repositories and 32 PRs in the TiKV repositories.
Support projection elimination so that the executor can run faster when it is not necessary to have a projection layer.
Write DDL binlog to file.
Convert sort and limit to top-n in the query planning phrase.
Support reading history data even if the schema changes.
Add comments for the server package and the plan package.
Add metrics for GC configuration.
Verify the data for utf-8 columns.