2017-04-17-tidb-weekly.md

title	date	summary	tags
Weekly update (April 10 ~ April 16, 2017)	2017-04-17	Last week, we landed 26 PRs in the TiDB repositories and 18 PRs in the TiKV repositories.	TiDB TiKV

Weekly update in TiDB

Last week, we landed 26 PRs in the TiDB repositories.

Added

• Update etcd client in vendor.

• Add builtin function time-to-sec

• Add definition for builtin functions: bit_count , to_base64 , right

Fixed

• Fix the error message for data overflow.

• Fix a panic.

• Fix a bug in top-n pushdown.

• Fix a data race bug in session context.

• Fix a bug in name resolver for GroupBy clause.

Improved

• Refactor optimizer: Implement new planner interface for projection and sort.

• Refactor statistic module.#3014, #3019, #3029, #3031, #3044, #3048, #3053

• Refactor coprocessor architecture: #3009, #3027

• Use etcd for privilege update notification among tidb-servers.

• Enlarge the limitation of write flow to TiKV.

• Reduce memory usage in HashAggregate operator.

• Reduce memory usage in Distinct operator.

• Code cleanup in type infer.

New Contributors

Thank you guys!

• Xuanwo

• fudali113

Weekly update in TiKV

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

Added

• Support memory profiling.

• Add block cache monitoring.

• Add log for critical operations.

• Use tokio-core to support asynchronous PD client, see 1745, 1752, 1753.

Fixed

• Always update PD client to avoid the problem that PD client can not reconnect to PD server after network error.

• Fix the bug when decode empty data to a StringSlice.

• Fix a deadlock bug when PD client reconnects server.

Improved

• Add lots of test cases to improve stability, see 1737 , 1738, 1742.