2018-06-04-tidb-weekly.md

title	date	summary	tags
Weekly update (May 28 ~ June 03, 2018)	2018-06-04	Last week, we landed 50 PRs in the TiDB repositories, 2 PRs in the TiSpark repositories, and 20 PRs in the TiKV and PD repositories.	TiDB TiKV PD TiSpark

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