OleDbSchemaGuid.Table_Constraints 字段

定义

返回在目录中定义的由给定用户拥有的表约束。Returns the table constraints defined in the catalog that is owned by a given user.

public: static initonly Guid Table_Constraints;
public static readonly Guid Table_Constraints;
 staticval mutable Table_Constraints : Guid
Public Shared ReadOnly Table_Constraints As Guid 

字段值

Guid

注解

Table_Constraints 映射到 OLE DB TABLE_CONSTRAINTS 行集。Table_Constraints maps to the OLE DB TABLE_CONSTRAINTS rowset. 除非另外指定,否则将按以下顺序返回限制列。Unless otherwise specified, restriction columns are returned in the following order.

限制列Restriction column CLR 数据类型CLR data type 说明Description
CONSTRAINT_CATALOGCONSTRAINT_CATALOG string 目录名称。Catalog name. 如果提供程序不支持目录,则为 null 值。A null value if the provider does not support catalogs.
CONSTRAINT_SCHEMACONSTRAINT_SCHEMA string 非限定的架构名称。Unqualified schema name. 如果提供程序不支持架构,则为 null 值。A null value if the provider does not support schemas.
CONSTRAINT_NAMECONSTRAINT_NAME string 约束名称。Constraint name.
TABLE_CATALOGTABLE_CATALOG string 定义表的目录名称。Catalog name in which the table is defined. 如果提供程序不支持目录,则为 null 值。A null value if the provider does not support catalogs.
TABLE_SCHEMATABLE_SCHEMA string 定义表的非限定架构名称。Unqualified schema name in which the table is defined. 如果提供程序不支持架构,则为 null 值。A null value if the provider does not support schemas.
TABLE_NAMETABLE_NAME string 表名。Table name.
CONSTRAINT_TYPECONSTRAINT_TYPE string 约束类型。Constraint type. 以下项之一: UNIQUE、PRIMARY KEY、FOREIGN KEY 或 CHECK。One of the following: UNIQUE, PRIMARY KEY, FOREIGN KEY, or CHECK.

适用于