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Mar 4, 2025
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mysql-schema: add information about several missing system tables #19944

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9 changes: 9 additions & 0 deletions mysql-schema/mysql-schema.md
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Expand Up @@ -48,6 +48,9 @@ aliases: ['/docs-cn/dev/system-tables/system-table-overview/','/docs-cn/dev/refe
* `stats_extended` 扩展统计信息，比如列之间的顺序相关性
* `stats_feedback` 统计信息的查询反馈
* `stats_fm_sketch` 统计信息列的直方图 FMSketch 分布
* `stats_table_locked` 被锁定的统计信息
* `stats_meta_history` 历史统计信息中的元信息部分
* `stats_history` 历史统计信息中的其它部分
* `analyze_options` 各个表默认的 `analyze` 参数
* `column_stats_usage` 列统计信息的使用情况
* `analyze_jobs` 正在执行的统计信息收集任务以及过去 7 天内的历史任务记录
Expand All @@ -57,6 +60,11 @@ aliases: ['/docs-cn/dev/system-tables/system-table-overview/','/docs-cn/dev/refe
* `bind_info` 执行计划的绑定信息
* `capture_plan_baselines_blacklist` 关于自动绑定执行计划对象的黑名单

## PLAN REPLAYER 相关系统表

* `plan_replayer_status` 用户注册的 [PLAN REPLAYER CAPTURE](/sql-plan-replayer.md#使用-plan-replayer-capture-功能) 抓取任务
* `plan_replayer_task` [PLAN REPLAYER CAPTURE](/sql-plan-replayer.md#使用-plan-replayer-capture-功能) 抓取结果

## GC Worker 相关系统表

* `gc_delete_range` 需要被 GC worker 定期删除的 KV 范围段
Expand Down Expand Up @@ -108,3 +116,4 @@ aliases: ['/docs-cn/dev/system-tables/system-table-overview/','/docs-cn/dev/refe
* `opt_rule_blacklist` 逻辑优化规则的黑名单
* `tidb_import_jobs` 记录 [`IMPORT INTO`](/sql-statements/sql-statement-import-into.md) 任务信息
* `tidb_timers` 存储了内部定时器的相关元信息
* `advisory_locks` 存储了[锁函数](/functions-and-operators/locking-functions.md)相关的信息