2017-06-26-tidb-weekly.md

title	date	summary	tags
Weekly update (June 19 ~ June 25, 2017)	2017-06-26	Last week, we landed 35 PRs in the TiDB repositories and 24 PRs in the TiKV repositories.	TiDB TiKV

Weekly update in TiDB

Last week, we landed 35 PRs in the TiDB repositories.

Added

• JSON type:
  • Tiny cleanup.
  • Fix a bug in JSON path_expr.
  • Fix a bug in unquote.
  • Make json_unquote compatiable with MySQL
  • Code cleanup.

Fixed

• Fix failed test cases on the ppc64le platform
• Fix a bug when naming table with the auto_increment column.
• Use UTC time to compose index key for timestamp column.
• Consider fsp for MySQLDuration type in some scenarios.
• Reset transaction when error occurs during retrying.
• Fix a bug about adding index after adding column with default value.
• Suport time format 'YY-MM-DD HH:MM'.
• Fix the issue of parsing datetime 00-00-00.

Improved

• Refactor the expression evaluation:
  • Rewrite concat with new expression framework.
  • Remove the inferType inerface of functionClass.
  • Rewrite the length built-in function with the new expression framework.
  • Wrap arguments when building new built-in functions.
  • Rewrite the makedate built-in function with the new expression framework.
• Change the result format of the aggregation operator.
• Refactor range related code: #3489, #3496
• Code style cleanup:#3502, #3505
• Handle out-of-range data in the load local file command.
• Remove the TiDBSkipDDLWait variable.

New contributor

dreamquster

Weekly update in TiKV

Last week, We landed 24 PRs in the TiKV repositories.

Added

• Use individual thread to handle high priority command.
• Support JSON type.
• Support the json_type, unquote, extract, json_merge functions for JSON.
• Add the TOPN, limit executors for coprocessor.

Fixed

• Handling GC command in tombstone tests.
• Print readable message if the RocksDB configuration parsing fails.

Improved

• Split different JSON modules into independent files.
• Revise leader lease time log.
• Remove sever thread and directly send Raft messages to the gRPC thread.
• Remove unnecessary read_quorum and uuid fields.