简介
INFORMATION_SCHEMA 提供了数据库的元数据信息，比数据库名、表名、列数据类型、或访问权限。也可以称为数据字典信息与系统概览
### 表概览
表名 | 简介
---|---
CHARACTER_SETS | Available character sets
COLLATION_CHARACTER_SET_APPLICABILITY | Character set applicable to each collation
COLLATIONS | Collations for each character set
COLUMN_PRIVILEGES | Privileges defined on columns
COLUMNS | Columns in each table
CONNECTION_CONTROL_FAILED_LOGIN_ATTEMPTS | Current number of consecutive failed connection attempts per account
ENGINES | Storage engine properties
EVENTS | Event Manager events
FILES | Files that store tablespace data
GLOBAL_STATUS | Global status variables
GLOBAL_VARIABLES | Global system variables
INNODB_BUFFER_PAGE | Pages in InnoDB buffer pool
INNODB_BUFFER_PAGE_LRU | LRU ordering of pages in InnoDB buffer pool
INNODB_BUFFER_POOL_STATS | InnoDB buffer pool statistics
INNODB_CMP | Status for operations related to compressed InnoDB tables
INNODB_CMP_PER_INDEX | Status for operations related to compressed InnoDB tables and indexes
INNODB_CMP_PER_INDEX_RESET | Status for operations related to compressed InnoDB tables and indexes
INNODB_CMP_RESET | Status for operations related to compressed InnoDB tables
INNODB_CMPMEM | Status for compressed pages within InnoDB buffer pool
INNODB_CMPMEM_RESET | Status for compressed pages within InnoDB buffer pool
INNODB_FT_BEING_DELETED | Snapshot of INNODB_FT_DELETED table
INNODB_FT_CONFIG | Metadata for InnoDB table FULLTEXT index and associated processing
INNODB_FT_DEFAULT_STOPWORD | Default list of stopwords for InnoDB FULLTEXT indexes
INNODB_FT_DELETED | Rows deleted from InnoDB table FULLTEXT index
INNODB_FT_INDEX_CACHE | Token information for newly inserted rows in InnoDB FULLTEXT index
INNODB_FT_INDEX_TABLE | Inverted index information for processing text searches against InnoDB table FULLTEXT index
INNODB_LOCK_WAITS | InnoDB transaction lock-wait information
INNODB_LOCKS | InnoDB transaction lock information
INNODB_METRICS | InnoDB performance information
INNODB_SYS_COLUMNS | Columns in each InnoDB table
INNODB_SYS_DATAFILES | Data file path information for InnoDB file-per-table and general tablespaces
INNODB_SYS_FIELDS | Key columns of InnoDB indexes
INNODB_SYS_FOREIGN | InnoDB foreign-key metadata
INNODB_SYS_FOREIGN_COLS | InnoDB foreign-key column status information
INNODB_SYS_INDEXES | InnoDB index metadata
INNODB_SYS_TABLES | InnoDB table metadata
INNODB_SYS_TABLESPACES | InnoDB file-per-table, general, and undo tablespace metadata
INNODB_SYS_TABLESTATS | InnoDB table low-level status information
INNODB_SYS_VIRTUAL | InnoDB virtual generated column metadata
INNODB_TEMP_TABLE_INFO | Information about active user-created InnoDB temporary tables
INNODB_TRX | Active InnoDB transaction information
KEY_COLUMN_USAGE | Which key columns have constraints
MYSQL_FIREWALL_USERS | Firewall in-memory data for account profiles
MYSQL_FIREWALL_WHITELIST | Firewall in-memory data for account profile allowlists
ndb_transid_mysql_connection_map | NDB transaction information
OPTIMIZER_TRACE | Information produced by optimizer trace activity
PARAMETERS | Stored routine parameters and stored function return values
PARTITIONS | Table partition information
PLUGINS | Plugin information
PROCESSLIST | Information about currently executing threads
PROFILING | Statement profiling information
REFERENTIAL_CONSTRAINTS | Foreign key information
ROUTINES | Stored routine information
SCHEMA_PRIVILEGES | Privileges defined on schemas
SCHEMATA | Schema information
SESSION_STATUS | Status variables for current session
SESSION_VARIABLES | System variables for current session
STATISTICS | Table index statistics
TABLE_CONSTRAINTS | Which tables have constraints
TABLE_PRIVILEGES | Privileges defined on tables
TABLES | Table information
TABLESPACES | Tablespace information
TP_THREAD_GROUP_STATE | Thread pool thread group states
TP_THREAD_GROUP_STATS | Thread pool thread group statistics
TP_THREAD_STATE | Thread pool thread information
TRIGGERS | Trigger information
USER_PRIVILEGES | Privileges defined globally per user
VIEWS | View information
### 表分类
- 压缩表相关
- 事务与锁相关
- 系统表
- 全文索引相关
- buffer pool相关
- 指标相关
- 临时表相关
- 文件与表空间相关