TiDB 2.0 RC1 release

TiDB 2.0 RC1 is released. This release has great improvement in MySQL compatibility, SQL optimization and stability.

Weekly update in TiDB

Last week, we landed 38 PRs in the TiDB repositories.

Added

• Support checking the consistency of an index
• Support decoding a column value by HTTP API
• Add validation for configuration
• Add HTTP API for settings
• Employ memory Tracker to track memory usage during query execution

Fixed

• Fix inconsistent behavior for insert
• Correct the behavior of the bit aggregate function
• Fix a bug that index is not used in a special case
• Fix the field length of Boolean type
• Handle warnings returned from tikv/mocktikv

Improved

• Set low priority for adding an index
• Support pseudo profiling table for compatibility
• Enhance decorrelation
• Check the password format for create user identified by password XXX
• Avoid the random error during Leader checking in GC
• Make CommitMaxBackoff configurable

Weekly update in TiSpark

Last week, we landed 8 PRs in the TiSpark repositories.

Added

• Add statistics information module
• Add the SQL dump for the Meta-server database

Fixed

• Fix the parse exception when a table name contains symbols
• Fix group by in DAGRequest
• Fix a document link

Improved

• Reduce jar size

Weekly update in TiKV and PD

Last week, we landed 32 PRs in the TiKV and PD repositories.

Added

• Configure the check SSD
• Check critical configurations when TiKV starts
• Initialize api for metrics

Fixed

• Create a parent directory if it does not exist
• Exclude offline store in FilterSource
• Fix usage template
• Fix a bug in SSD test
• Cancel unused Region heartbeat RPC
• Delete the overlap from etcd
• Fix a panic caused by the merged Region
• Fix stale Region information with overlaps that should be removed
• Fix a segfault
• Fix a bug of the operator type
• Fix health status with TLS enabled

Improved

• Count the number of offline Regions
• Tune the default snapshot I/O limitation
• Increase the operator timeout
• Record the elapsed time of operatorStep
• Move storage read operations into ReadPool

New contributors (Thanks!)

TiDB:

• shizy
• 杨 洋