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Constraint_Column_Usage Field

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: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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