Weekly update in TiDB

Last week, we landed 36 PRs in the TiDB repositories.

Added

• Add the Iterator interface in Chunk.

Removed

• Remove the useless aggregation function during buildQuantifierPlan.

Fixed

• Flen and Decimal of TypeNewDecimal should not be -1.
• To pass sysbench Prepare tests, set Fields for SelectStmt in PrepareExec.
• Fix the case that fails to split a table.
• Correct the type inference of the sum and avg functions.
• Make set transaction read only work, compatible with JDBC connector.

Improved

• Change BuildRange to build column/index/table range to improve performance.
• Make KvEncoder support encoding Prepare SQL.
• Refine codes about maxOneRow.
• Use chunk.Iterator for joinGenerator.
• Merge ranger.IndexRange and ranger.ColumnRange to ranger.NewRange.
• Reduce allocation for DetachCondsForSelectivity, and add a Filter function.
• Support alter table auto_increment.
• Support pushing down stream aggregation on mocktikv.
• Support Chunk in executors:
  • NestedLoopApply
  • UnionScanExec

Weekly update in TiSpark

Last week, we landed 12 PRs in the TiSpark repositories.

Improved

• Dynamically downgrade the index scan plan to table scan plan.
• Optimize the column logic of Aggregation pushing down.
• Add the date type pushing down logic.
• Reduce dependencies.
• Add tests for issues.
• Add switching to ignore the unsupported type.
• Use the parent child POM mode instead of submodule.

Fixed

• Fix the NPE issue of Aggregation pushing down.
• Remove time test cases.
• Modify integration scripts and .gitignore files.
• Remove the Scala lang provided in the POM file.
• Delete the unnecessary variable.

Weekly update in TiKV and PD

Last week, we landed 18 PRs in the TiKV and PD repositories.

Added

• Support builtin aggregation functions bit_and, 'bit_or and bit_xor in Coprocessor.
• Upgrade the version of gRPC-rs to 0.2.
• Make delete_range configurable.
• Enable table split by default.
• Add trend API in PD.
• Increase the priority of the raftstore thread.
• Add ScatterRegion API in PD.
• Move SST instead of copying in injestion.
• Update the version of fail-rs to 0.2.

Fixed

• Fix the return type of avg and sum in Coprocessor.
• Catch stale command in the scheduler.
• Fix build error on macOS.

Improved

• Clean up the select interface in Coprocessor.
• Collect metrics more efficiently in Coprocessor.
• Make fail point tests more stable.

New contributor (Thanks!)

• TiKV: Rain Li