Weekly update in TiDB

Last week, we landed 28 PRs in the TiDB repositories.

Added

• Add builtin function uncompress and uncompressdlength, convert_tz, period-diff

• Fill data into information_schema.key_column_usage.

• Add Open interface for Executor.

• Show warnings for Load Data statement.

• Support Json type and functions in parser.

• Support top-n operator in new planner.

Fixed

• Consider session variable time_zone for timestamp datum.

• Fix data race problem in IndexLookup Executor.

• Fix a bug in HashJoin Executor encoding/decoding.

• Return right value for @@version.

Improved

• Refator range calculation related code.

• Refactor expression evaluation framework: Add self attribute in builtin function.Return panic when calling wrong function on baseXBuiltinFunc.

Weekly update in TiKV

Last week, We landed 17 PRs in the TiKV repositories.

Added

• Use clap to parse command line options.

• Show TiKV instance downtime state in pd-ctl.

• Show scheduling operation history in pd-ctl.

• Show cluster ID in pd-ctl.

• Introduce SmallGroupFirstQueue to speedup point get later.

• Use zstd compression type.

• Add process metrics in Prometheus.

Fixed

• Fix dial wrong listening address bug.

• Remove the offline peer directly.

• Mark peer as pending_remove to avoid following operations.

Improved

• Add the reason of cluster ID mismatch in error log.

• Add log to apply delegate register and deregister.