Modifier

Partager via

OleDbSchemaGuid.Constraint_Column_Usage Field

  • Reference

Definition

Namespace:
System.Data.OleDb
Assembly:
System.Data.OleDb.dll
Assembly:
System.Data.dll
Package:
System.Data.OleDb v8.0.1
Package:
System.Data.OleDb v9.0.0-rc.2.24473.5
Source:
OleDbSchemaGuid.cs
Source:
OleDbSchemaGuid.cs
Source:
OleDbSchemaGuid.cs
Source:
OleDbSchemaGuid.cs
Source:
OleDbSchemaGuid.cs

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

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

Field Value

Guid

Remarks

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.

Applies to