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.