Weekly update in TiDB

Last week, we landed 70 PRs in the TiDB repository.

Added

• Add a configuration item for the bind info lease
• Support the := MySQL extension syntax in variable assignment
• Add the host column in the slow_query table
• Support the deadlock detector in mocktikv for pessimistic transactions
• Support single statement rollback for pessimistic transactions
• Support SplitIndexRegion with lower and upper values
• Add a configuration item to specify GC concurrency manually

Improved

• Print an expensive log when a query exceeds the time threshold
• Use the maximum correlation in heuristic row count estimation
• Optimize addSpecialComment by reusing compiled regular expressions

Fixed

• Commit the current transaction automatically before executing some statements
• Fix the wrong output of show create table for partitioned tables
• Fix an issue for RBAC methods when enabling --skip-grant-table
• Fix fast Analyze bugs during the Analyze process
• Fix a shallow copy problem about slow_query
• Fix a panic for CreateView using Prepare
• Fix the issue that duplicate values might occur when the uuid function is executed simultaneously on multiple nodes
• Check whether the JSON value is valid before UnmarshalJSON
• Fix the bug that a blob column is changed to a text column when altering the table charset
• Fix an issue when the constant overflows the range of the primary key type
• Fix an issue when the predicate is PKIsHandle = 1.1

Weekly update in TiSpark

Last week, we landed 17 PRs in the TiSpark repository.

Fixed

• Fix the IndexOutOfBoundException issue when trying to get the PD member
• Fix the issue that the key not in range exception is thrown

Added

• Support the auto increment attribute for batch writes

Weekly update in TiKV and PD

Last week, we landed 28 PRs in the TiKV and PD repositories.

Added

• Add batch aggregate functions
  • MultiplyDecimal
  • MAX()
  • MIN()
  • BitAnd()
  • BitOr()
  • BitXor()
  • UnaryNot
• Add the batch Top-N executor
• Add the initialized flag in the cluster status
• Add the HTTP endpoint to enable the Jemalloc profile

Improved

• Upgrade sys-info

Fixed

• Fix the issue that the TiKV snapshot might not be replicated

New contributors (Thanks!)

tidb:

• suzaku
• tangenta

tikv:

• YKG
• YangKeao
• benpigchu
• chenyukang
• hhhowyou

parser:

• tangenta