Remarks
Call the typedef class CColumns to implement its parameter class CColumnsInfo. See Schema Rowset Classes and Typedef Classes for more information on using typedef classes.
This class identifies the columns of tables defined in the catalog that are accessible to a given user.
The following table lists the class data members and their corresponding OLE DB Columns. See COLUMNS Rowset in the OLE DB Programmer's Reference for more information about the schema and columns.
| Data members | OLE DB columns |
| 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 |
| m_bColumnHasDefault | COLUMN_HASDEFAULT |
| m_szColumnDefault | COLUMN_DEFAULT |
| m_nColumnFlags | COLUMN_FLAGS |
| m_bIsNullable | IS_NULLABLE |
| m_nDataType | DATA_TYPE |
| m_guidType | TYPE_GUID |
| m_nMaxLength | CHARACTER_MAXIMUM_LENGTH |
| m_nOctetLength | CHARACTER_OCTET_LENGTH |
| m_nNumericPrecision | NUMERIC_PRECISION |
| m_nNumericScale | NUMERIC_SCALE |
| m_nDateTimePrecision | DATETIME_PRECISION |
| m_szCharSetCatalog | CHARACTER_SET_CATALOG |
| m_szCharSetSchema | CHARACTER_SET_SCHEMA |
| m_szCharSetName | CHARACTER_SET_NAME |
| m_szCollationCatalog | COLLATION_CATALOG |
| m_szCollationSchema | COLLATION_SCHEMA |
| m_szCollationName | COLLATION_NAME |
| m_szDomainCatalog | DOMAIN_CATALOG |
| m_szDomainSchema | DOMAIN_SCHEMA |
| m_szDomainName | DOMAIN_NAME |
| m_szDescription | DESCRIPTION |
#include <atldbsch.h>
Sample
See Also