Weekly update in TiDB

Last week, we landed 40 PRs in the TiDB repositories.

Added

• Support Sort Merge Join operator.

• Add many builtin functions: degree, insert, instr, any_value, elt, uuid, ord, sin, inet_ntoa, maketime, sha2, quarter

• Add a command line flag to start TiDB without authentication function.

• Support use special comment /*+ */ for optimizer hint.

• Make index serial scan concurrency configurable with system variable.

Fixed

• Replace standard context package with golang.org/x/net/context.

• Fix a bug in the floor builtin function.

• Fix a bug in the date_format builtin function.

• Fix goroutine leak in tikv client.

Improved

• Build statistics with multiple goroutines.

• Refactor coprocessor architecture: Add DAG physical plan protobuf.

• Refactor TiDB specific system variable: Make code cleaner.

New Contributors

Thank you guys!

• Ma Xiaoyu

• Zhang Yuning

• zs634134578

• Arthur Yang

• qhsong

• Sheng Tang

• hiwjd

Weekly update in TiKV

Last week, We landed 18 PRs in the TiKV repositories.

Added

• Add RocksDB WAL options to support in memory storage.

Fixed

• Fix fetching stale TSO when leader switches back to the previous node.

• Make sure that commit TS is always after the start TS.

• Speed up the process of transfer leader.

Improved

• Make Lock CF configurable.

• Make schedule and replication options persistent.

• Optimize balance speed with calculating leader/region count from cache.

• Prepare for introducing mio 0.6, see 1691 1692 1695.

New Contributor (Thanks!)

• aya