Weekly update in TiDB

Last week, we landed 45 PRs in the TiDB repository.

Added

• Enable the Mutex profiling in the TiDB server
• Let Analyze use the RC level and the low priority
• Support Grow of the chunk capacity
• Add job action and schema version information to metrics
• Forbid users to drop an important system table
• Support rollback when adding an index in a partitioned table
• Add a KeyOnly option for the Seek operation
• Maintain HistColl in StatsInfo of DataSource
• Add a TiDB tracing prototype

Improved

• Remove goroutine_pool
• Remove the test coverage task from travis
• Rebase the auto increment ID when needed
• Fix the lint tool
• Make the duplicate error output in the Update statement more clearly
• Bump Go version to 1.11
• Make TestTableSplit stable in the ddl package
• Improve compatibility for converting a string to an integer
• Use the shallow copy for Join
• Improve the propagate constant and propagate more filters

Fixed

• Fix the Hash Join executor and break the innerTable fetcher if an error happens during fetching the outer table
• Fix the AutoAnalyze trigger condition
• Fix data race in ddl.TestStat()
• Add an unsigned flag to the Year type
• Fix the last_insert_id in INSERT... ON DUPLICATE KEY UPDATE
• Fix the update error of zero column size in the statistics package
• Fix the issue that the Year type string format has too many leading zeros in the Prepare and Execute statements
• Fix the insert zero timestamp bug in the Prepare statement
• Fix the out of range error for intdiv
• Fix ComStmtSendLongData when the data length is 0
• Fix the INSERT... ON DUPLICATE KEY UPDATE plan
• Fix a bug for bit default value
• Fix the admin check table error when a column of the index is virtually generated

Weekly update in TiSpark

Last week, we landed 2 PRs in the TiSpark repository.

Fixed

• Fix the issue that table not exists might occur when loading the table

Improved

• Add details in the explain result

Weekly update in TiKV and PD

Last week, we landed 30 PRs in the TiKV and PD repositories.

Added

• Add new built-in functions:

  • builtin-is_ipv6
  • builtin-sign
  • builtin-atan_1_arg and builtin-atan_2_args

• Add new documents:

  • overview, op-guide, and client
  • TiKV Control User Guide
  • RocksDB Option Configuration
  • TiKV Coprocessor Configuration
  • Reference to CNCF

• Add a method to get approximate_split_keys()

• Add keepalive configurations

• Add statistics for the PD simulator

• Add the GetAllStores function to the PD Client interface

Fixed

• Fix the false stale peer alert

Improved

• Use the approximate way to split large Regions
• Reduce clone in the transaction process
• Print the help message when starting tikv-ctl without arguments
• Remove some unnecessary conversions in PD

New contributors (Thanks!)

tidb-operator:

• fengzixu

tidb:

• shafreeck

tikv:

• Observer42
• caniszczyk