Weekly update in TiDB

Last week, we landed 50 PRs in the TiDB repository.

Added

• Add the /debug/zip API to get useful debugging information at once
• Support SET ROLE and CURRENT_ROLE

Improved

• Replace map in GetFormatType with switch-case to speed up execution
• Change the type of RoundMode from string to int32 to speed up execution
• Support Change and ChangeExec
• Improve row count estimation for the index range containing correlated columns
• Unify the log format for the util package
• Unify the log format for the store package
• Unify the log format for the ddl package
• Remove the wait time after canceling a job
• Support chunk size control for Joiners and Join-executors
• Unify the log format for the statistics package
• Add more checks for create table partition by range column
• Unify the log format for the session package
• Unify the log format for the table package
• Disable non-deterministic function calls for generated columns

Fixed

• Fix the panic in SELECT * FROM information_schema.processlist
• Fix an unexpected overflow error when adding a big signed integer and a big unsigned integer
• Fix the privilege check failure for GRANT ON TABLE
• Fix the issue that str_to_date is not compatible with MySQL in some cases
• Fix a panic in the window function when order-by items contain NULL
• Fix a wrong format of the slow log
• Fix the issue that Select+1000 is not compatible with MySQL

Weekly update in TiSpark

Last week, we landed 4 PRs in the TiSpark repository.

Fixed

• Update the kvproto version that breaks compilation

Weekly update in TiKV and PD

Last week, we landed 26 PRs in the TiKV and PD repositories.

Added

• Implement the instr coprocessor built-in function

Improved

• Use single quotes in coprocessor error messages
• Improve instr_binary, locate, and locate_binary coprocessor built-in functions
• Support batch for the table scan executor

Fixed

• Fix the issue of the PD scheduler removing the Region leader
• Return warnings when casting a float string to an integer string

Engineering

• Use lite-runtime in Protobuf
• Abstract some new jemalloc code
• Fix a compiling warning
• Check SSE4.2 in the release build
• Use static metrics in the TiKV raw read
• Refactor TableScanExecutor and IndexScanExecutor

New contributors (Thanks!)

tikv:

• Xuanwo

tidb:

• b41sh

pd:

• elitecodegroovy

parser:

• aliiohs
• hawkingrei
• loxp
• wjhuang2016