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分布式版-V3.2.3企业版LTS

V3.2.3 文档更新记录
文档概览
使用指南
- 介绍
- 部署数据库
- 数据迁移
- 数据库连接和路由
- 集群和多租户管理
- 数据库对象管理
- 分布式存储管理
- 性能调优
- 高可用和容灾
- 数据库安全
- 运维操作
- 系统参考
  - 系统配置项
  - 系统变量（MySQL 模式）
  - 系统变量（Oracle 模式）
  - 系统视图（MySQL 模式）
    - 概述
    - 字典视图
      - 字典视图总览
      - mysql.help_topic
      - mysql.help_category
      - mysql.help_keyword
      - mysql.help_relation
      - mysql.db
      - mysql.proc
      - mysql.time_zone
      - mysql.time_zone_name
      - mysql.time_zone_transition
      - mysql.time_zone_transition_type
      - mysql.user
      - information_schema.CHARACTER_SETS
      - information_schema.CHECK_CONSTRAINTS
      - information_schema.COLLATIONS
      - information_schema.COLLATION_CHARACTER_SET_APPLICABILITY
      - information_schema.COLUMNS
      - information_schema.DBA_OUTLINES
      - information_schema.ENGINES
      - information_schema.GLOBAL_STATUS
      - information_schema.GLOBAL_VARIABLES
      - information_schema.KEY_COLUMN_USAGE
      - information_schema.PARAMETERS
      - information_schema.PARTITIONS
      - information_schema.PROCESSLIST
      - information_schema.REFERENTIAL_CONSTRAINTS
      - information_schema.ROUTINES
      - information_schema.SCHEMATA
      - information_schema.SCHEMA_PRIVILEGES
      - information_schema.SESSION_STATUS
      - information_schema.SESSION_VARIABLES
      - information_schema.STATISTICS
      - information_schema.TABLES
      - information_schema.TABLE_CONSTRAINTS
      - information_schema.TABLE_PRIVILEGES
      - information_schema.USER_PRIVILEGES
      - information_schema.USER_RECYCLEBIN
      - information_schema.VIEWS
      - information_schema.CONNECTION_CONTROL_FAILED_LOGIN_ATTEMPTS
      - oceanbase.CDB_OB_BACKUP_ARCHIVELOG_SUMMARY
      - oceanbase.CDB_OB_BACKUP_JOB_DETAILS
      - oceanbase.CDB_OB_BACKUP_SET_DETAILS
      - oceanbase.CDB_OB_BACKUP_PROGRESS
      - oceanbase.CDB_OB_BACKUP_SET_EXPIRED
      - oceanbase.CDB_OB_BACKUP_ARCHIVELOG_PROGRESS
      - oceanbase.CDB_OB_BACKUP_CLEAN_HISTORY
      - oceanbase.CDB_OB_BACKUP_TASK_CLEAN_HISTORY
      - oceanbase.CDB_OB_RESTORE_PROGRESS
      - oceanbase.CDB_OB_RESTORE_HISTORY
      - oceanbase.CDB_CKPT_HISTORY
      - oceanbase.CDB_OB_BACKUP_VALIDATION_JOB
      - oceanbase.CDB_OB_BACKUP_VALIDATION_JOB_HISTORY
      - oceanbase.CDB_OB_TENANT_BACKUP_VALIDATION_TASK
      - oceanbase.CDB_OB_BACKUP_VALIDATION_TASK_HISTORY
      - oceanbase.CDB_OB_BACKUP_BACKUP_ARCHIVELOG_SUMMARY
      - oceanbase.CDB_OB_BACKUP_BACKUPSET_TASK_HISTORY
      - oceanbase.CDB_OB_BACKUP_BACKUPSET_TASK
      - oceanbase.CDB_OB_BACKUP_BACKUPSET_JOB_HISTORY
      - oceanbase.CDB_OB_BACKUP_BACKUPSET_JOB
      - oceanbase.CDB_OB_BACKUP_SET_OBSOLETE
      - oceanbase.CDB_OB_BACKUP_ARCHIVELOG
      - oceanbase.CDB_OB_BACKUP_BACKUP_ARCHIVELOG
      - oceanbase.CDB_OB_BACKUP_BACKUPPIECE_JOB
      - oceanbase.CDB_OB_BACKUP_BACKUPPIECE_JOB_HISTORY
      - oceanbase.CDB_OB_BACKUP_BACKUPPIECE_TASK
      - oceanbase.CDB_OB_BACKUP_BACKUPPIECE_TASK_HISTORY
      - oceanbase.CDB_OB_BACKUP_PIECE_FILES
      - oceanbase.CDB_OB_BACKUP_SET_FILES
    - 性能视图
  - 系统视图（Oracle 模式）
  - 常见统计事件说明
  - 常见等待事件说明
  - 错误码（MySQL 模式）
  - 错误码（Oracle 模式）
  - 预留关键字（MySQL 模式）
  - 预留关键字（Oracle 模式）
开发指南
系统架构
版本发布记录
术语

mysql.help_category

更新时间：2023-07-18 17:25:59

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功能

与其他三个表 mysql.help_relation、mysql.help_topic、mysql.help_keyword 合作生成 help 命令。

相关表/视图

mysql.help_relation
mysql.help_topic
mysql.help_keyword

字段说明

字段名称	类型	是否可以为 NULL	描述
help_category_id	bigint(20)	NO	类目 ID
name	varchar(64)	NO	类目名
parent_category_id	bigint(20)	YES	父类目 ID
url	varchar(65535)	NO	url 地址

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