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information_schema.TABLE_CONSTRAINTS

更新时间：2026-04-10 12:01:01

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功能

描述表约束信息。

说明

从 V1.4 版本开始引入。

字段说明

字段名称	类型	是否可以为 NULL	描述
CONSTRAINT_CATALOG	varchar(64)	NO	约束目录
CONSTRAINT_SCHEMA	varchar(128)	NO	数据库名
CONSTRAINT_NAME	varchar(256)	NO	约束名称
TABLE_SCHEMA	varchar(128)	NO	数据库名
TABLE_NAME	varchar(256)	NO	表名
CONSTRAINT_TYPE	varchar(11)	NO	约束类型
ENFORCED	varchar(3)	NO	约束是否启用

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