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  • Tue, Jan 24, 2017

Weekly update in TiDB

Last two weeks, we landed 87 PRs in the TiDB repositories.

Added

  • Support statistic on index data

  • Support file sort operator

  • Add key prefix length limitation on index

  • Support the TIMESTAMPDIFF built-in function.

  • Support the CONV built-in function.

  • Support the SUBSTR built-in function.

  • Support the SIGN built-in function.

  • Support the FROM_DAYS built-in function.

  • Support the FIELD built-in function.

  • Support the FLOOR built-in function.

  • Support the SQRT built-in function.

  • Add some metrics: #2417, #2419, #2435, #2451, #2460, [#2477])(https://github.com/pingcap/tidb/pull/2477)

  • Set a limitation about the key-value count and size in a single transaction.

  • Support Rename Table and Alter Table Rename Table statement.

Fixed

  • Add a length limitation for logging sql statement when meet sytax error.

  • Fix a bug when binary literal has charset prefix.

  • Fix a few bugs about optimizer: #2439, #2440, #2452

  • Fix a bug about parsing aggragate function.

  • Fix a bug about two phrase commit.

  • Fix a bug about round function.

  • Fix a bug occurs when subquery contains a aggragetion.

  • Fix a memory leak in Join Executor.

Improved

  • Use cache to store privilege info.

  • Refactor correlated subquery optimization.

  • Speed up delete statement executor.

  • Handle raft entry too large error.

  • Change the argument name for displaying version from v to V: keep consistent with pd/tikv.

  • Convert distinct to aggragate.

New contributor

  • zhexuany

Weekly update in TiKV

Last two weeks, We landed 50 PRs in the TiKV repositories.

Added

  • Add -V flag for PD and TiKV.

  • Set a limitation for the max size of the raft entry.

  • Make disabling manual compaction configurable.

  • Add fail reason tag in raft request and coprocessor metrics.

  • Add snapshot KV count and size metrics.

  • Add count of written keys metric.

  • Add raft log lag metric.

  • Add thread CPU collector.

  • Support compaction_readahead_size for spinning disk.

  • Support getting region with key in pd-ctl .

  • Statistic region write key-value count and bytes.

Fixed

  • Fix a pitfall when use different context package.

  • Count KV count in other CF when check splitting.

  • Avoid submitting secondary key if primary key is locked.

  • Use disk size as storage capacity when capacity is set to 0.

  • Check locked for ResolveLock in latch.

Improved

  • Keep large integer precision and check integer overflow.

  • Check promotable when handle raft MsgTimeoutNow.

  • Unify logger.

  • Resume paused follower when receive MsgHeartbeatResp message.

  • Reset the pending state when add node.

  • Allow running one GC command at the same time.

  • Guarantee replicas are safe if possible.

  • Keep leader alive before initialization.

  • Log slow request for scheduler.

  • Record scan efficiency for coprocessor.

  • Make raft log GC not depend on PeerStorage.

  • Accelerate ticks for new split region leader.

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