Weekly update in TiDB

Last week, we landed 46 PRs in the TiDB repository.

Added

• Store the TiDB server information to PD and add the HTTP API handle
• Support dropping the index for the partitioned table
• Support the Replace operation for table partition
• Add BatchPut and BatchDelete for the Raw client
• Support CharsetOpt to load the data statement in Parser

Fixed

• Fix group_concat when the chunk size is set to 1
• Fix the admin check index panic when the index contains the pkIsHandle column
• Fix the fraction part handle of current_timestamp
• Fix the panic in checkRangePartitioningKeysConstraints when creating table partitions by range columns
• Set the proper customized timezone
• Set the types of index columns in CheckIndexRangeExec
• Fix the missing microsecond for the timestamp
• Fix duplicate row check when the chunk size is small
• Fix the return value of resultType/flag in the enum/set column information

Improved

• Log detailed statistics for the query feedback
• Collect execution details and output them in the slow query log
• Notify the statistics worker when truncating tables
• Add a new interface MergePartialResult for the new aggregation framework

Weekly update in TiSpark

Last week, we landed 2 PRs in the TiSpark repository.

Fixed

• Fix the Index Read error caused by splitting or moving Regions
• Refactor error handling

Weekly update in TiKV and PD

Last week, we landed 48 PRs in the TiKV and PD repositories.

Added

• Support more functions in Coprocessor:

  • Sqrt
  • Pow
  • UnHex
  • is_ipv4
  • Tan
  • ASCII
  • Left
  • LeftShift

• Add nodes dynamically in the PD simulator

• Add an option to disable the namespace checker

• Add Version and use conf to initialize nodes in the PD simulator

• Add EvalConfigBuilder

• Support batch_split

Fixed

• Create a peer if needed when pre-vote is received
• Fix a bug in do_div_mod

Improved

• Optimize MVCC scanners
• Refactor the PD Selector
• Optimize prefix_next
• Decode bytes in place
• Improve the performance of the Region tree

New contributors (Thanks!)

TiDB:

• mengnan

TiKV:

• arosspope
• bombless
• opensourcegeek
• xiangyuf

PD:

• lerencao

docs:

• lerencao

docs-cn:

• ahdong2007
• lerencao