Weekly update in TiDB

Last week, we landed 49 PRs in the TiDB repositories.

Added

• Add the CHANGELOG.md file to the TiDB repository
• Support more ODBC syntaxes
• Support PARTITION BY RANGE COLUMNS in SHOW CREATE TABLE
• Support the ALTER CONVERT TO syntax
• Support the ALTER TABLE AUTO_INCREMENT syntax
• Support the SET NAMES COLLATE DEFAULT syntax

Fixed

• Fix Dump/Load statistics information
• Fix data race on the LockKeys() function
• Fix range calculating in the TableHandlesToKVRanges() function
• Fix the compatibility problem of the UNION statement
• Fix the wrong behavior of the tryToGetMemTask() function
• Refine the optimization rule of “TopN Push Down”

Improved

• Add more log information about slow queries
• Log the slow Coprocessor task in detail
• Enhance the validation of column names when creating a table

Weekly update in TiSpark

Last week, we released TiSpark 1.0 GA and landed 18 PRs in the TiSpark repositories.

Fixed

• Fix the leaky session
• Fix the unsigned index
• Fix the logic of handling the stale epoch error
• Fix the logic of handling zero store ID
• Fix the map single table method

Improved

• Allow forcing the metadata to refresh
• Adjust the retry policy factor and cache invalidation

Weekly update in TiKV and PD

Last week, we landed 21 PRs in the TiKV and PD repositories.

Added

• Add the change log for TiKV
• Add the change log for 2.0 GA
• Add metrics for hotspot cache
• Do fuzz test

Fixed

• Improve the Key Scan feature and fix a bug for MVCC

Improved

• Refine the installation instructions
• Collect Raft's log
• Adjust clean_stale_peer_delay
• Merge (RAW)KV_COMMAND_COUNTER into COMMAND_COUNTER
• Release the log cache eagerly using GC