2017-02-13-tidb-weekly.md

title	date	summary	tags
Weekly update (February 06 ~ February 12, 2017)	2017-02-13	Last two weeks, we landed 25 PRs in the TiDB repositories and 14 PRs in the TiKV repositories.	TiDB TiKV

Weekly update in TiDB

Last two weeks, we landed 25 PRs in the TiDB repositories.

Added

• Support basic privilege framework: #2423, #2557, #2603, #2607,

• Support ALTER [COLUMN] col_name SET DEFAULT statement.

• Validate column default value when creating table.

• Support ALTER TABLE ... DROP DEFAULT statement.

• Support changing default value and comment in alter table statement.

Fixed

• Fix build on i386.

• Fix output format of prometheus interval log.

• Clean up log: #2599, #2601

• Fix a bug in HashJoin executor: some errors are ignored.

• Fix a bug in arithmetic expression type inference.

• Fix a bug in builtin function timediff.

Improved

• Speed up unit tests.

• Make test cases more stable: #2595, #2596

• Remove useless code in parser package.

• Change string default collation to utf8_bin. We do not support case insensitive comparation yet.

Weekly update in TiKV

Last week, We landed 14 PRs in the TiKV repositories.

Added

• Use seek_for_prev directly.

• Refactor cut_row and cut_idx_key for row value analysis in coprocessor.

• Extract an interface to support different snapshot format.

Fixed

• Fix panic when stop scheduler worker.

• Fix invalid link in PD readme.

Improved

• Evaluate logic operations lazily.

• Use prefix seek to speed up read for Write CF.

• Separate advance to advance_ready and advance_apply for async-apply later.

• Use shutdown to do cleanup when stop worker.