Weekly update in TiDB

Last week, we landed 54 PRs in the TiDB repository.

Added

• Add a variable max-txn-time-use to make maxTxnTimeUse configurable

Improved

• Validate the variable value when you set tx_isolation
• Refine HashJoinExec of a specific JoinType for the nil outer/inner case
• Add SQL type labels to commit and retry logs
• Delay initializing Txn() to the statements that really need it
• Adjust the TIDB_INLJ Hint to specify the inner table
• Support the NO_AUTO_CREATE_USER SQL mode
• Validate specified values for the enum/set type column in DDL

Fixed

• Clone AggDesc before modifying its Mode in AggDesc.Split
• Close the child executor before calling ExplainExec.explain.RenderResult()
• Escape backquotes in identifiers in SHOW CREATE TABLE properly
• Convert Zero input correctly for column type year
• Eliminate extra columns introduced by OrderBy upon Union
• Fix the error caused by different lengths between embedded and outer OrderByItems
• Consider null for comparing operators in expression rewriting
• Impose specified OrderBy on the union result of TableDual
• Use Column.UniqueID in conditionChecker of ranger

Weekly update in TiSpark

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

Added

• Add the partition information in TiTableInfo

Fixed

• Fix isolation level settings

Weekly update in TiKV and PD

Last week, we landed 29 PRs in the TiKV and PD repositories.

Added

• Add a memory BTreeEngine for the local test

• Support reversing raw_scan and raw_batch_scan in storage

• Add the ldb argument in tikv-ctl to support the rocksdb command

• Support more functions in Coprocessor:

  • ToBase64 and FromBase64
  • Substring2Args and Substring3Args
  • DayName, DayOfMouth, DayOfWeek and DayOfYear

Improved

• Use a block strategy for the file logger
• Use lifetime to manage the start and the stop of Storage
• Optimize ingesting snapshots
• Avoid large Write batch during the GC process of Raft logs
• Omit some logs about compact log
• Check the store state before creating operators

Fixed

• Fix the issue about parsing ambiguous time

New contributor (Thanks!)

tikv: kamijin-fanta