Weekly update in TiDB

Last week, we landed 48 PRs in the TiDB repositories and 6 PRs in the TiDB docs repositories.

Added

• Support the built-in function: str_to_date.

• Refactor the time structure: Introduce a TimeInternal interface to replace the go time representation.

• Add the raw Key-Value API and make TiKV a raw Key-Value engine.

• Add a bench tool for the raw Key-Value API.

• Support the PARTITION keyword: parsed but ignored.

• Support the Alter User statement to change user’s password.

• Support the set password = pwd; statement.

• Use circleci.

Fixed

• Check duplicate column names when adding index.

• Check duplicate index columns when creating table.

• Fix a bug when join exists in subquery.

• Make the schema out of date error retry automatically within TiDB.

• Fix a typo in the INFORMATION_SCHEMA.COLUMNS table.

• Fix the date_format type infer bug.

• Do not prune the set variable expression in projection.

Improved

• Update the template for new issue.

• Use the statement context to handle truncated error.

• Push the aggregate operator down under union all.

Document change

The following guides are updated:

• TiDB Docker Deployment

• Compatibility with MySQL

Weekly update in TiKV

Last week, we landed 22 PRs in the TiKV repositories.

Added

• Support consistency check to find if data is corrupted or not dynamically.

• Add configuration to control the max running task count.

• Add the raw Key-Value API.

Fixed

• Check the Placement Driver list to fix #1186.

• Check whether the term is stale for the Raft command to fix #1317.

• Schedule the log Garbage Collection by size to fix #1337.

Improved

• Replace the score type with resource kind to calculate the scores more easily.

• Replace origin concept balance with schedule and simplify configurations.

• Use coordinator to control the speed of different schedulers.