2017-01-01-tidb-weekly.md

title	date	summary	tags
Weekly update (December 26 ~ January 01, 2017)	2017-01-01	Last week, we landed 28 PRs in the TiDB repositories and 19 PRs in the TiKV repositories.	TiDB TiKV

Weekly update in TiDB

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

Added

• Support the CHAR_LENGTH built-in function.

• Support the CRC32 built-in function.

• Support the LEAST built-in function.

Fixed

• Fix a bug in Add Column with invalid default value.

• Fix a bug about parsing string to float.

• Fix a bug when using int and uint as join key.

• Fix a bug in MySQL Protocol layer about prepared statement.

Improved

• Improve string to date parser.

• Improve TiDB schema lease checker.

• Refactor optimizer: #2321, #2322

• Set a limitation on the quantity of the data in a single transaction.

• Improve mocked tikv: Split data in a table into multiple mocked regions. This will used in unit tests.

• Speed up creating table: In some cases, it is not necessary to wait a long time to create table.

• Use MySQL standard error code when meeting incorrect function argument count error.

• Find a better way to handle StoreNotMatch error.

• Refactor built-in function: #2343, #2344, #2362, #2367

• Clean up tidb-server codes: #2356, #2358

New contributor

• Zyguan

• AndreMouche

Weekly update in TiKV

Last week, We landed 19 PRs in the TiKV repositories.

Added

• Move raw_get to thread pool.

• Add ResourceKind for operator and don't resend duplicated AddPeer response when the peer is still pending, see #449.

• Add member command for pd-ctl.

Fixed

• Fix getting valid float.

Improved

• Update default configuration to speed up scheduler.

• Don't panic when receiving stale snapshot.

• Remove unnecessary region cache.

• Remove no used constraint feature.

• Exit with error message if clusert ID mismatches directly.

• Add replication section in configuration.