Weekly update in TiDB

Last two weeks, we landed 27 PRs in the TiDB repositories.

Added

• Support the select 1 order by 1 syntax

Fixed

• Fix the bug in insert statements when dropping columns
• Fix the bug when updating the stats table

Improved

• Allow golint to check context.Context in make check
• Do not import golang.org/x/net/context as goctx alias
• Move the package context to sessionctx
• Add the recover mechanism for join workers
• Add StatementsPerTransaction and TransactionDuration metrics
• Add keep alive metrics to figure out whether TiDB instance is down

Weekly update in TiKV and PD

Last two weeks, we landed 13 PRs in the TiKV and PD repositories.

Added

• Add peer label level statistics
• Support stream aggregation
• Support multiple Regions in tombstone
• Add a handler which is invoked after the client reconnects to PD

Fixed

• Fix the misspelled word to improve GoReport Card Result
• Fix the panic caused by region not found
• Fix the bug of the hot region scheduler adding peers to down stores

Improved

• Add the timestamp field for the Region heartbeat
• Increase the priority of replica checker's operator
• Increase the default value of the replica scheduler limit