Weekly update in TiDB

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

Added

• Support the Trace syntax
• Support the TIDB_IS_DDL_OWNER builtin function
• Support ALL for builtin aggregate function BIT_AND/BIT_OR/BIT_XOR

Fixed

• Check the correctness of decimal's exponent part
• Fix the affected row count for the UPDATE statement
• Fix the range construction for the IN builtin function
• Fix the empty result of the JOIN statement
• Fix row count estimation for the LIMIT operator
• Fix the error message of the DIV builtin function
• Check the schema name of the column for the CREATE TABLE statement
• Fix the side effect of casting one decimal to another decimal

Improved

• Push ABS to TiKV
• Wait for a while when some errors occurred to avoid retrying the DDL job too many times
• Unify the log format of the connection ID
• Ignore foreign keys in the SHOW CREATE TABLE statement
• Change statistics delta update duration to 1 minute
• Check invalid tasks after physical optimization
• Unify the DDL logs

Weekly update in TiSpark

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

Fixed

• Fix the ScanIterator logic where the index may be out of bound

Improved

• Update gRPC version to 1.12.0

Weekly update in TiKV and PD

Last week, we landed 20 PRs in the TiKV and PD repositories.

Added

• Encode and decode for arrow chunk

Fixed

• Report an error instead of getting a result if the divisor/dividend is 0 in do_div_mod
• Fix the bug that the Learner flag mistakenly reports to PD

Improved

• Remove NumberDecoder trait from codec
• Use the average Region size to check if stores need balance
• Check the Region epoch before adding operators

New contributors (Thanks!)

TiDB：

• 谷月轩
• bb7133

TiKV：

• bb7133