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OleDbSchemaGuid.Constraint_Column_Usage Field

Returns the columns used by referential constraints, unique constraints, check constraints, and assertions, defined in the catalog and owned by a given user.

Namespace:  System.Data.OleDb
Assembly:  System.Data (in System.Data.dll)

public static readonly Guid Constraint_Column_Usage

Constraint_Column_Usage maps to the OLE DB CONSTRAINT_COLUMN_USAGE rowset. Unless otherwise specified, restriction columns are returned in the following order.

Restriction column

CLR data type

Description

TABLE_CATALOG

string

Catalog name in which the table is defined. A null value if the provider does not support catalogs.

TABLE_SCHEMA

string

Unqualified schema name in which the table is defined. A null value if the provider does not support schemas.

TABLE_NAME

string

Table name.

COLUMN_NAME

string

Column name. This column, together with the COLUMN_GUID and COLUMN_PROPID columns, forms the column ID. One or more of these columns will be a null value, depending on which elements of the DBID structure the provider uses.

CONSTRAINT_CATALOG

string

Catalog name. A null value if the provider does not support catalogs.

CONSTRAINT_SCHEMA

string

Unqualified schema name. A null value if the provider does not support schemas.

CONSTRAINT_NAME

string

Constraint name.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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