2017-07-31-tidb-weekly.md

title	date	summary	tags
Weekly update (July 24 ~ July 30, 2017)	2017-07-31	Last week, we landed 50 PRs in the TiDB repositories and 27 PRs in the TiKV repositories.	TiDB TiKV

Weekly update in TiDB

Last week, we landed 50 PRs in the TiDB repositories.

Added

• Add a debugging tool for transaction inspection.
• Support two JSON syntactic sugars.
• Support renaming multiple tables in a single statement.

Fixed

• Fix a bug in the update statement when doing the alter table after statement.
• Fix signed integer overflow in the minus unary scalar function.
• Fix the content in the information_schema for unsigned columns.
• Fix inserting zero length data into a column with zero field length.
• Check the field length limitation in the alter table statement.
• Add the field length limitation for the index columns.
• The password builtin function should return empty string when meeting null argument.
• Check the table name with white space in the end.

Improved

• Add more DDL test cases.
• Refactor the explain statement.
• Refactor the following expression/builtin-function evaluation framework:
  • pi
  • logicalAnd
  • cot
  • exp
  • logicalXor
  • bitAnd
  • logicalOr
  • bitOr
  • bitXor
  • leftShift
  • rightShift
  • bitNeg
• Extract configuration related code to the config package.
• Improve the unit test coverage:
  • ast package
• Fix a bug of using undefined user variable.
• Make go vet happy.

New Contributor (Thanks!)

• Jiaxing Liang
• Hu Ming
• Wei Fu
• Liao Qiang

Weekly update in TiKV

Last week, We landed 27 PRs in the TiKV repositories.

Added

• Add the transaction debugging gRPC API.
• Add the ceil, abs functions for coprocessor.
• Add the compaction priority for RocksDB.
• Handle thenull datum for coprocessor.

Fixed

• Decrease the load limit to 10000.
• Fix a bug when using offset in expressions for coprocessor.
• Fix trace_size computing.
• Let Travis decide which compiler to use automatically.
• Fix a message delay bug.
• Avoid unnecessary clones when sending Raft messages.

Improved

• Log more detailed error when transaction fails.
• Refactor RocksDB options.
• Implement serde for enum and readable types.
• Use the FIFO queue for coprocessor work queue.
• Decrease default leader-schedule-limit to 64.
• Update distinct score calculation for different stores.
• Enhance the PD join function.

New contributors

• ariesdevil
• bailaohe
• dantin