2017-02-05-tidb-weekly.md

title	date	summary	tags
Weekly update (January 23 ~ February 05, 2017)	2017-02-05	Last two weeks, we landed 43 PRs in the TiDB repositories and 20 PRs in the TiKV repositories.	TiDB TiKV

Weekly update in TiDB

Last two weeks, we landed 43 PRs in the TiDB repositories.

Added

• Support information_schema.table_constraints.

• Support the UTC_TIMESTAMP builtin function

• Increase transaction entry count limit.

• Add logs for expensive query and big transaction: 2536, 2545, 2546

Fixed

• Fix GC lifetime metrics.

• Fix primary key name parsing.

• Fix a bug of left outer semi join.

• Fix a bug of exists sub query.

• Fix a bug abaout prefix index.

Improved

• Only plans that have apply will add cache.

• Use a short-cut way to way And/Or/Xor expresson.

• Refine the range calculating.

Weekly update in TiKV

Last two weeks, we landed 20 PRs in the TiKV repositories.

Added

• Add start_ts for scan in tikv-ctl.

• Support HTTP scheme parsing.

Fixed

• Fix too long scan slow log.

Improved

• Use reverse_seek_le for the reverse seek write.

• Ignore overwriting data in prewrite.

• Update raft in raftstore after handling ConfChange.

• Make coprocessor task run more concurrently.

• Ignore deleting the value when roll back lock.

• Update leader lease before applying raft log.