2017-02-27-tidb-weekly.md

title	date	summary	tags
Weekly update (February 19 ~ February 26, 2017)	2017-02-27	Last week, we landed 39 PRs in the TiDB repositories and 25 PRs in the TiKV repositories.	TiDB TiKV

Weekly update in TiDB

Last week, we landed 39 PRs in the TiDB repositories.

Added

• Support Revoke statement.

• Add rules in parser and empty implementation for unsupported builtin functions: #2667, #2677, #2679

• Support wildcard chars in username or host in Grant statement.

• Add a context arggument for distsql/kv interface: We will use the context to cancel running jobs.

• Support Create Table ... Like statement.

• Support ON UPDATE CURRENT_TIMESTAMP with precision

• Support Show Warnings statement.

Fixed

• Fix memory leak when IndexScanExecutor meet error.

• Add missing field length information for show databases;

• Add missing field length information for Show statement.

• Fix compatibility problme about string truncate error.

• Ignore malformated data in MySQL packet.

• Fix a bug about topn operator pushdown.

• Fix a bug about add column with default value and not null flag.

Improved

• Prune correlated columns in groupby item list.

• Imporve the performance of point get query using primary key or unique key by 3%.

• Decorrelated for aggregation.

Weekly update in TiKV

Last week, We landed 25 PRs in the TiKV repositories.

Added

• Detect system CPU/memory to adjust config automatically.

• Add RocksDB statistics.

• Balance store according to region count.

• Add label, ping , admin, scheduler, operator commands for pd-ctl.

• Add shuffle region scheduler.

Fixed

• Verify PD address when start pd-ctl.

• Reject read index when new leader hasn’t committed the empty entry.

• Accelerate campaign faster after split happens.

• Use default value in column info.

Improved

• Save one TS get for single point get by unique or primary key.

• Prettfiy command label name in metrics.

• Make Raft apply atomically.

• Add region ID for scheduler slow log.