2017-05-02-tidb-weekly.md

title	date	summary	tags
Weekly update (April 24 ~ April 30, 2017)	2017-05-02	Last week, we landed 49 PRs in the TiDB repositories and 16 PRs in the TiKV repositories.	TiDB TiKV

Weekly update in TiDB

Last week, we landed 49 PRs in the TiDB repositories.

Added

• Add builtin function truncate, makedate, utc_time

• Add pre-commit hook.

• Add a plan for Analyze.

• Add a check list about the things that contributors should think about before sending a PR.

• Support ENGINE option with partition option in table definition.

• Add code review guide.

Fixed

• Fix bug in converting string to hex/bit.

• Fix a few panic when infering type for some functions without argument.

• Fix a data race in Join operator.

Improved

• Add countReliable attribute in physicalPlanInfo: In CBO phrase, when row count is estimated by real statistics or limit clause, the cost is reliable.

• Refactor TypeInferer: Add a few interfaces for evaluate expression, Refine EvalBool,

• Refactor planner: Union, Hash Aggregate, Union Scan, Join, Apply, Refine code

• Refactor executor: Table Scan

• Improve contribute guide.

• Make goword happy in the following package: ddl, util, tablecodec, expression, bootstrap, model, table, ast, perfschema

• Add a few empty memory tables in information_schema: Make DTS happy.

• When where expresion can be converted to false, use dual table instead of a read table.

New Contributors

Thank you guys!

• lkk2003rty

• Ce Gao

• Zejun Li

Weekly update in TiKV

Last week, We landed 16 PRs in the TiKV repositories.

Added

• Let the right split region derive the parent region information.

• Add a hot region scheduler.

• Introduce structure log and support JSON format.

• Use --data-dir instead of --store for TiKV storage path.

Fixed

• Support idempotent bootstrap for TiKV.

• Detect snapshot in all nodes.

• Use non-system port to avoid test failed.

Improved

• Throttle big query to reduce the influence on the point query.

• Add test for applying entries.

• Use a better mechanism when re-connecting PD.

• Ignore unnecessary message size computing.