2017-03-27-tidb-weekly.md

title	date	summary	tags
Weekly update (March 20 ~ March 26, 2017)	2017-03-27	Last week, we landed 40 PRs in the TiDB repositories and 18 PRs in the TiKV repositories.	TiDB TiKV

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