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TiDB 支持使用 MySQL 5.7 中提供的所有控制流程函数。
| 函数名 | 功能描述 |
|---|---|
| CASE | Case 操作符 |
| IF() | 构建 if/else |
| IFNULL() | 构建 Null if/else |
| NULLIF() | 如果 expr1 = expr2，返回 NULL |
控制流程函数
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- 架构
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- 安全加固
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- SQL
- SQL 语言结构和语法
- SQL 语句
- ADD COLUMN
- ADD INDEX
- ADMIN
- ADMIN CANCEL DDL
- ADMIN CHECKSUM TABLE
- ADMIN CHECK [TABLE|INDEX]
- ADMIN CLEANUP
- ADMIN RECOVER INDEX
- ADMIN SHOW DDL [JOBS|QUERIES]
- ADMIN SHOW TELEMETRY
- ALTER DATABASE
- ALTER INDEX
- ALTER INSTANCE
- ALTER PLACEMENT POLICY
- ALTER TABLE
- ALTER TABLE COMPACT
- ALTER USER
- ANALYZE TABLE
- BACKUP
- BATCH
- BEGIN
- CHANGE COLUMN
- CHANGE DRAINER
- CHANGE PUMP
- COMMIT
- CREATE [GLOBAL|SESSION] BINDING
- CREATE DATABASE
- CREATE INDEX
- CREATE PLACEMENT POLICY
- CREATE ROLE
- CREATE SEQUENCE
- CREATE TABLE LIKE
- CREATE TABLE
- CREATE USER
- CREATE VIEW
- DEALLOCATE
- DELETE
- DESC
- DESCRIBE
- DO
- DROP [GLOBAL|SESSION] BINDING
- DROP COLUMN
- DROP DATABASE
- DROP INDEX
- DROP PLACEMENT POLICY
- DROP ROLE
- DROP SEQUENCE
- DROP STATS
- DROP TABLE
- DROP USER
- DROP VIEW
- EXECUTE
- EXPLAIN ANALYZE
- EXPLAIN
- FLASHBACK CLUSTER TO TIMESTAMP
- FLASHBACK DATABASE
- FLASHBACK TABLE
- FLUSH PRIVILEGES
- FLUSH STATUS
- FLUSH TABLES
- GRANT <privileges>
- GRANT <role>
- INSERT
- KILL [TIDB]
- LOAD DATA
- LOAD STATS
- LOCK STATS
- LOCK TABLES 和UNLOCK TABLES
- MODIFY COLUMN
- PREPARE
- RECOVER TABLE
- RENAME INDEX
- RENAME TABLE
- RENAME USER
- REPLACE
- RESTORE
- REVOKE <privileges>
- REVOKE <role>
- ROLLBACK
- SAVEPOINT
- SELECT
- SET DEFAULT ROLE
- SET [NAMES|CHARACTER SET]
- SET PASSWORD
- SET ROLE
- SET TRANSACTION
- SET [GLOBAL|SESSION] <variable>
- SHOW [BACKUPS|RESTORES]
- SHOW ANALYZE STATUS
- SHOW [GLOBAL|SESSION] BINDINGS
- SHOW BUILTINS
- SHOW CHARACTER SET
- SHOW COLLATION
- SHOW [FULL] COLUMNS FROM
- SHOW CONFIG
- SHOW CREATE PLACEMENT POLICY
- SHOW CREATE SEQUENCE
- SHOW CREATE TABLE
- SHOW CREATE DATABASE
- SHOW CREATE USER
- SHOW DATABASES
- SHOW DRAINER STATUS
- SHOW ENGINES
- SHOW ERRORS
- SHOW [FULL] FIELDS FROM
- SHOW GRANTS
- SHOW INDEX [FROM|IN]
- SHOW INDEXES [FROM|IN]
- SHOW KEYS [FROM|IN]
- SHOW MASTER STATUS
- SHOW PLACEMENT
- SHOW PLACEMENT FOR
- SHOW PLACEMENT LABELS
- SHOW PLUGINS
- SHOW PRIVILEGES
- SHOW [FULL] PROCESSSLIST
- SHOW PROFILES
- SHOW PUMP STATUS
- SHOW SCHEMAS
- SHOW STATS_HEALTHY
- SHOW STATS_HISTOGRAMS
- SHOW STATS_LOCKED
- SHOW STATS_META
- SHOW STATUS
- SHOW TABLE NEXT_ROW_ID
- SHOW TABLE REGIONS
- SHOW TABLE STATUS
- SHOW [FULL] TABLES
- SHOW [GLOBAL|SESSION] VARIABLES
- SHOW WARNINGS
- SHUTDOWN
- SPLIT REGION
- START TRANSACTION
- TABLE
- TRACE
- TRUNCATE
- UNLOCK STATS
- UPDATE
- USE
- WITH
- 数据类型
- 函数与操作符
- 聚簇索引
- 约束
- 生成列
- SQL 模式
- 表属性
- 事务
- 视图
- 分区表
- 临时表
- 缓存表
- 字符集和排序
- Placement Rules in SQL
- 系统表
- mysql
- INFORMATION_SCHEMA
- Overview
- ANALYZE_STATUS
- CLIENT_ERRORS_SUMMARY_BY_HOST
- CLIENT_ERRORS_SUMMARY_BY_USER
- CLIENT_ERRORS_SUMMARY_GLOBAL
- CHARACTER_SETS
- CLUSTER_CONFIG
- CLUSTER_HARDWARE
- CLUSTER_INFO
- CLUSTER_LOAD
- CLUSTER_LOG
- CLUSTER_SYSTEMINFO
- COLLATIONS
- COLLATION_CHARACTER_SET_APPLICABILITY
- COLUMNS
- DATA_LOCK_WAITS
- DDL_JOBS
- DEADLOCKS
- ENGINES
- INSPECTION_RESULT
- INSPECTION_RULES
- INSPECTION_SUMMARY
- KEY_COLUMN_USAGE
- MEMORY_USAGE
- MEMORY_USAGE_OPS_HISTORY
- METRICS_SUMMARY
- METRICS_TABLES
- PARTITIONS
- PLACEMENT_POLICIES
- PROCESSLIST
- REFERENTIAL_CONSTRAINTS
- SCHEMATA
- SEQUENCES
- SESSION_VARIABLES
- SLOW_QUERY
- STATISTICS
- TABLES
- TABLE_CONSTRAINTS
- TABLE_STORAGE_STATS
- TIDB_HOT_REGIONS
- TIDB_HOT_REGIONS_HISTORY
- TIDB_INDEXES
- TIDB_SERVERS_INFO
- TIDB_TRX
- TIFLASH_REPLICA
- TIFLASH_SEGMENTS
- TIFLASH_TABLES
- TIKV_REGION_PEERS
- TIKV_REGION_STATUS
- TIKV_STORE_STATUS
- USER_ATTRIBUTES
- USER_PRIVILEGES
- VARIABLES_INFO
- VIEWS
- METRICS_SCHEMA
- 元数据锁
- UI
- 遥测
- 错误码
- 通过拓扑 label 进行副本调度
- 版本发布历史
- 术语表
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