Weekly update in TiDB

Last week, we landed 34 PRs in the TiDB repository.

Added

• Make the query feedback work for the partitioned table
• Support a new aggregate framework for HashAggExec

Fixed

• Fix a bug when using a correlated column as the index
• Fix the prepare result for zero timestamp/time/datetime
• Fix the Enum type flag bug
• Make partition by range value accept the constant expression
• Fix concat in the GROUP statement
• Fix selecting null value for table partition
• Use the unified infoschema in select ... information_schema.tables
• Fix the Format function for the Mod opcode

Improved

• Split ranges if the slice is too big
• Execute the admin command with Super_priv

Weekly update in TiSpark

Last week, we landed 3 PRs in the TiSpark repository.

Added

• Decode JSON to string

Weekly update in TiKV and PD

Last week, we landed 27 PRs in the TiKV and PD repositories.

Added

• Add new built-in functions:

  • builtin-cos
  • builtin-date
  • builtin-inet6_aton

• Support producing multiple split keys in split-checker

Fixed

• Update approximate_size and approximate_keys after the Region is merged

Improved

• Make a more efficient workflow for Raft LocalReader
• Remove the IsolationLevel and ScanMode options from MvccTxn
• Handle the API error properly instead of turning them into gRPC errors
• Add new forward/backward Scanners to improve the scan performance
• Try ask_split when ask_batch_split is incompatible
• Associate a buffer to AggFuncExpr to reduce memory allocation

New contributors (Thanks!)

TiKV:

• hawkingrei
• niedhui
• vkorenev

TiSpark:

• alex-lx