MySQL 8.4 Release Notes
TABLE_CONSTRAINTS_EXTENSIONS 表提供有关主存储引擎和次存储引擎定义的表约束属性的信息。The TABLE_CONSTRAINTS_EXTENSIONS
table provides information about table constraint attributes
defined for primary and secondary storage engines.
Note
TABLE_CONSTRAINTS_EXTENSIONS 表预留供将来使用。The TABLE_CONSTRAINTS_EXTENSIONS
table is reserved for future use.
TABLE_CONSTRAINTS_EXTENSIONS 表具有以下列：The TABLE_CONSTRAINTS_EXTENSIONS
table has these columns:
CONSTRAINT_CATALOGCONSTRAINT_CATALOG表所属的目录名称。The name of the catalog to which the table belongs.
CONSTRAINT_SCHEMACONSTRAINT_SCHEMA表所属的模式（数据库）名称。The name of the schema (database) to which the table belongs.
CONSTRAINT_NAMECONSTRAINT_NAME约束的名称。The name of the constraint.
TABLE_NAMETABLE_NAME表的名称。The name of the table.
ENGINE_ATTRIBUTEENGINE_ATTRIBUTE为主存储引擎定义的约束属性。预留供将来使用。Constraint attributes defined for the primary storage engine. Reserved for future use.
SECONDARY_ENGINE_ATTRIBUTESECONDARY_ENGINE_ATTRIBUTE为辅助存储引擎定义的约束属性。预留供将来使用。Constraint attributes defined for the secondary storage engine. Reserved for future use.