Weekly update in TiDB

Last week, we landed 59 PRs in the TiDB repository.

Added

• Introduce vectorized evaluation methods for each hybrid type
• Make Column support hybrid types in the vectorized evaluation
• Support the syntax of query block

Improved

• Support IndexJoin over UnionScan for release-2.1
• Record startTime of a query to the Session variables
• Record the index name in the slow log instead of in the index ID
• Fix the wasted sleep and return an error in the last backoff
• Use BatchPointGet to improve the execution performance of the SELECT ... WHERE IN statement
• Split a separate Region for an index when splitting the table Region

Fixed

• Fix DIV with the decimal type
• Fix the error check in EvalSubquery
• Fix the for update condition for the PointGet query
• Fix the panic when executing SQL statements to change the Pump state
• Fix TxnSize to be the number of involved keys in the Region
• Fix the failure of privilege check for CREATE USER and DROP USER
• Fix the failure of privilege check for SET DEFAULT ROLE
• Fix the wrong results of Not/IsTrue/IsFalse functions

Weekly update in TiSpark

Last week, we landed 14 PRs in the TiSpark repository.

Fixed

• Fix the bug that tables are not found in the TiSession because of the synchronization
• Disable the pushdown aggregate with an alias to fix the bug that DISTINCT is failed without an alias
• Fix the incorrect usage of removeIf when using UnmodifiableIterator

Weekly update in TiKV and PD

Last week, we landed 38 PRs in the TiKV and PD repositories.

Added

• Support EndKey in the PD ScanRegions request
• Add the config-check flag to pd-server
• Add config-check flag to tikv-server
• Assign high priority to the PD administration operators
• Use LeaderLease to determine the validity of PD TSO service
• Implement ConvertTo<Json>/CAST as Duration for evaluable types in the Coprocessor

Improved

• Improve the performance when collecting scanning details
• Improve the performance of decode_decimal in the Coprocessor
• Improve the performance of detecting deadlocks in a transaction

Fixed

• Fix the command help message for tikv-ctl

New contributors (Thanks!)

tidb:

• ZYunH
• jiyfhust
• EmilStenstrom
• zhiqiangxu

tikv:

• 928234269

docs-cn:

• sydnever

parser:

• ichn-hu
• doggeral