OleDbSchemaGuid.Constraint_Column_Usage Field
Definition
Important
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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
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
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