Weekly update in TiDB

Last week, we landed 55 PRs in the TiDB repositories.

Added

• Support renaming a table as its original name
• Allow correlated columns to be pushed down to TiKV
• Support local latches for the transactions in TiDB
• Add an option to stop writing Binlog when TiDB meets some Binlog errors
• Add an HTTP API to enable or disable the general log of TiDB
• Update the logrus package to a new version

Fixed

• Set lastInsertID in the duplicated update statement
• Fix several bugs of statistics feedback
• Fix a bug occurred when values are inserted into a time column
• Fix a bug when creating a table and renaming a table run concurrently
• Rollback all keys when Prewrite fails
• Fix a bug when adding index meets handle = MaxInt64
• Fix a bug when the limit offset is a multiple of MaxChunkSize
• Fix a bug when a complex subquery exists in the Update statement

Improved

• Refine the error message about Out of range value for column
• Set gc_worker and loadDeleteRangeSQL to a much higher priority
• Make tidb_opt_insubquery_unfold a global variable
• Uniform the calculation method of pseudo statistics
• Improve the CPU usage when opentracing is not enabled

Weekly update in TiKV and PD

Last week, we landed 24 PRs in the TiKV and PD repositories.

Added

• Support reverse_scan

Fixed

• Check learner regardless of whether learner is enabled or not
• Use AtomicU64 instead of RwLock to track the snapshot size

Improved

• Migrate CircleCI 1.0 to 2.0
• Ignore Lock when lock's type is Lock
• Decode the number by accessing slice directly