Weekly update in TiDB

Last week, we landed 52 PRs in the TiDB repository.

Added

• Add the tidb_skip_isolation_level_check variable to skip the isolation check
• Support fast Analyze in the planner and executor's builder
• Support EXPLAIN on ConnectionID
• Add the RevokeRole support

Improved

• Validate the value when setting the read_only variable
• Refine some code in http_handler.go
• Improve the UT coverage of the metrics package to 100%
• Remove the useless memoryAllocator struct
• Make convertToIndexScan and convertToTableScan return results more quickly
• Improve the UT coverage of the meta package from 76% to 85%
• Solve the bootstrap write conflict when starting multiple tidb-servers in a new cluster
• Update the db-table/{table_partition_id} HTTP API
• Improve the UT coverage of the util/kvencoder package to 85%
• Trace and control the memory usage in DistSQL layer
• Improve the UT coverage of types/json package to 85%
• Stop server startup if an unrecognized option is found in a configuration file
• Ignore Fulltext keys in the CREATE TABLE and ALTER TABLE statements
• Check the KEY option for the generated column when creating a table

Fixed

• Fix the issue that EXTRACT MONTH does not support 0
• Fix the issue that MONTHNAME is incompatible with MySQL
• Fix the issue that JSON_KEY is incompatible with MySQL
• Fix the issue that MAKETIME is incompatible with MySQL
• Fix the leak test failure issue of RecordSet
• Fix the issue that EXPLAIN ANALYZE does not include the execution info column
• Fix the issue that Charset/Collation shown in SHOW FULL COLUMNS is incompatible with MySQL
• Fix the wrongly altering SHARD_ROW_ID_BITS issue in some cases

Weekly update in TiSpark

Last week, we landed 9 PRs in the TiSpark repository.

Added

• Support the CreateTableLike command

Fixed

• Remove the Spark dependency in tikv-client
• Fix the desc table command failure issue for hive tables
• Fix incorrect next() implementation for Key

Improved

• Clean up the JSONType code

Weekly update in TiKV and PD

Last week, we landed 32 PRs in the TiKV and PD repositories.

Added

• Add metrics for TSO handling time in PD

Improvement

• Move tikv_util as a component
• Use tokio-threadpool and thread local metrics for readpool
• Add the max_columns check when building a vectorized expression
• Add the tcmalloc support to the tikv_alloc crate

Fixed

• Fix the prefix extractor panic when deleting a range
• Remove strict_sql_mode covered by sql_mode
• Avoid a panic in RotatingFileLogger of TiKV
• Enlarge the stall buffer ingested by TiKV

New contributors (Thanks!)

tikv:

• ZhangHanDong

tidb-operator:

• qiffang

parser:

• hhxcc

docs-cn:

• reAsOn2010