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.