Remarks
Call the typedef class CKeyColumns to implement its parameter class CKeyColumnInfo. See Schema Rowset Classes and Typedef Classes for more information on using typedef classes.
This class identifies the columns, defined in the catalog, that are constrained as keys by a given user.
The following table lists the class data members and their corresponding OLE DB Columns. See KEY_COLUMN_USAGE Rowset in the OLE DB Programmer's Reference for more information about the schema and columns.
| Data members | OLE DB columns |
| m_szConstraintCatalog | CONSTRAINT_CATALOG |
| m_szConstraintSchema | CONSTRAINT_SCHEMA |
| m_szConstraintName | CONSTRAINT_NAME |
| m_szTableCatalog | TABLE_CATALOG |
| m_szTableSchema | TABLE_SCHEMA |
| m_szTableName | TABLE_NAME |
| m_szColumnName | COLUMN_NAME |
| m_guidColumn | COLUMN_GUID |
| m_nColumnPropID | COLUMN_PROPID |
| m_nOrdinalPosition | ORDINAL_POSITION |
#include <atldbsch.h>
See Also