Weekly update in TiDB

Last week, we landed 29 PRs in the TiDB repository.

Added

• Support dumping statistics for partitioned tables
• Add a variable to control the statement priority of a TiDB server
• Add a WithRecovery() function in the util package

Improved

• Remove the DDL version in metrics
• Set TiDBMemQuotaQuery to the value in the configuration file
• Prune columns for LogicalTableDual
• Optimize the IsPoint() function for performance
• Support limit/group-by/order-by clauses in Point_Get
• Reuse chunks to reduce memory usage in UnionScan
• Add correctness check for some system variables
• Optimize constant fold for null parameter expressions to simplify the outer join
• Enhance predicate pushdown over join
• Support the init_vector argument for the built-in function AES_ENCRYPT/AES_DECRYPT

Fixed

• Fix a bug in the Format() function for some expressions
• Fix the session time in show processlist
• Fix INFORMATION_SCHEMA.SCHEMATA to show correct charset and collation
• Fix incorrect unquoted functions for JSON escape sequences
• Consider the timezone when adding an index in the timestamp column
• Fix predicate pushdown for UnionScan
• Fix mistaken conversion from the outer join to the inner join
• Fix a bug caused by the schema of union

Weekly update in TiKV and PD

Last week, we landed 14 PRs in the TiKV and PD repositories.

Added

• Add the sha1 built-in function
• Add unpushed built-in UDFs Log1Arg and Log2Args

Improved

• Refactor Month by using new handle_invalid_time_error
• Make Runable::run a default method
• Move Coprocessor to the read pool
• Adjust the PD project layout
• Make some parameters configurable in the simulator

Fixed

• Fix the from_hex bug
• Fix micro_secs of Duration
• Fix the panic of adjacent-region-scheduler after PD transfers the leader
• Fix the DisableNamespaceRelocation option clone behavior

New contributors (Thanks!)

TiDB:

• FateTHarlaown
• Kingwl
• chenyanzhe

TiKV:

• haoxiang47
• koushiro
• sch00lb0y

docs-cn:

• oasangqi