# 7. Data Access Interfaces

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Preface
Data Access Interfaces
Virtuoso .NET Data Provider
Interactive SQL Utility
Virtuoso Driver for ODBC
Virtuoso Driver for JDBC
OLE DB Provider for Virtuoso
Using the OLE DB Provider for Virtuoso Known Limitations Data Types Metadata Supported Interfaces Data Source Objects Sessions Rowsets
Virtuoso In-Process Client
Unix Domain Socket Connections

## 7.5. OLE DB Provider for Virtuoso

OLE DB is an open data access technology developed and promoted by Microsoft. It allows for uniform data access across diverse data sources including but not limited to conventional RDBMSes. Based on the COM architecture it providies very flexible and exhaustive set of interfaces any database application developer might ever need. At the same time, OLE DB is somewhat overcomplicated and therefore is rarely used directly. In the majority of cases people use ADO(+) instead, ADO is another, somewhat simpler, of Microsoft's data access technologies. However, ADO itself is based upon OLE DB, thus those who use ADO make indirect use of OLE DB as well.

With the advent of ADO.NET, OLE DB is no longer as an much essential part of the overall Microsoft data access architecture as it used to be. However it still remains important and useful working together with the Microsoft OLE DB .NET Data Provider.

The OLE DB Provider for Virtuoso (VIRTOLEDB) gives OLE DB and ADO applications access to the Virtuoso databases. In principle, the same thing is possible through the conjunction of the Virtuoso ODBC driver and Microsoft OLE DB Provider for ODBC. However, VIRTOLEDB provides native OLE DB access which is more complete and more efficient. Therefore it is preferable for this purpose.

### 7.5.1. Using the OLE DB Provider for Virtuoso

Being a COM in-process server VIRTOLEDB has to be installed on the client computer. When VIRTOLEDB is properly installed it can be used by a host of existing applications thanks to the support of standard OLE DB interfaces.

#### 7.5.1.1. System Requirements

VIRTOLEDB requires the following software:

- Windows 98, ME, NT4.0, 2000, or XP.
- Virtuoso Server version 2.7 or higher running on the same or remote computer.
- Redistributable files provided with Microsoft Data Access Components (MDAC) 2.5 or higher. Note that this version of MDAC comes along with Windows 2000. It is also available (as well as other versions of MDAC) at the Microsoft Web site: http://www.microsoft.com/data/

#### 7.5.1.2. Installing the Provider

VIRTOLEDB is installed as a part of Virtuoso installation on a Windows platform. The following files pertain to the OLE DB Provider for Virtuoso.

Table: 7.5.1.2.1. OLE DB Provider for Virtuoso Files
File | Description
--- | ---
virtoledb.dll | DLL that implements the VIRTOLEDB provider.
virtoledb.h | Header file for development of VIRTOLEDB consumers.

The installation procedure, in addition to placing VIRTOLEDB files on a client computer, also registers VIRTOLEDB in the system to make it known as a COM server. This also makes it available through the OLE DB root enumerator object and the Data Links component.

#### 7.5.1.3. Invoking the Provider

Applications that utilize OLE DB Data Links component can use VIRTOLEDB without any specific measures. Applications that need to directly invoke VIRTOLEDB should follow examples provided in this section.

##### 7.5.1.3.1. Using Data Link User Interface

Data Links is a user interface component for connecting to OLE DB data sources and constructing ADO-style connection strings. It belongs to OLE DB core components and is a part of MDAC. It is used my many applications including development environments like MS Visual Studio.

VIRTOLEDB uses the extension mechanism of the Data Link API and provides a customized version of the Data Link connection page.

Figure: 7.5.1.3.1.1. Data Link Provider Page

Figure: 7.5.1.3.1.2. Data Link Connection Page

##### 7.5.1.3.2. Using COM and OLE DB Interfaces Directly

Applications that utilize OLE DB Data Links component can use VIRTOLEDB without any specific measures. Applications that need to directly invoke VIRTOLEDB should follow examples provided in this section.

    #define INITGUID
    #include "virtoledb.h"

    ..

      IDBInitialize* pIDBInitialize = NULL;
      HRESULT hr = CoCreateInstance(CLSID_VIRTOLEDB, NULL, CLSCTX_INPROC_SERVER,
                                    IID_IDBInitialize, (void**) &pIDBInitialize);
      if (FAILED(hr))
        goto EXIT;

##### 7.5.1.3.3. ADO Applications

    Dim strConn As String
    Dim objConn As ADODB.Connection

    strConn = "Provider=VIRTOLEDB;Data Source=localhost:1111;User Id=dba;Password=dba;Initial Catalog=Demo;Prompt=NoPrompt;"

    Set objConn = New ADODB.Connection
    objConn.CursorLocation = adUseServer
    objConn.Open strConn

### 7.5.2. Known Limitations

- Per-column properties are not supported.
- Reference accessors are not supported.
- Optimized accessors are not supported.
- Asynchronous execution is not supported.

### 7.5.3. Data Types

#### 7.5.3.1. Data Type Mappings in Rowsets and Parameters

The methods that provide information about rowset columns and command parameters (IColumnsInfo::GetColumnInfo, ICommandWithParameters::GetParameterInfo) use the mapping of Virtuoso data types into OLE DB data types shown in the following table.

Table: 7.5.3.1.1. Data Type Mappings
Virtuoso Type | OLE DB Type
--- | ---
CHAR | DBTYPE_STR
VARCHAR | DBTYPE_STR
LONG VARCHAR | DBTYPE_STR
NCHAR | DBTYPE_WSTR
NVARCHAR | DBTYPE_WSTR
LONG NVARCHAR | DBTYPE_WSTR
NUMERIC | DBTYPE_NUMERIC
DECIMAL | DBTYPE_NUMERIC
SMALLINT | DBTYPE_I2
INTEGER | DBTYPE_I4
FLOAT | DBTYPE_R8
DOUBLE | DBTYPE_R8
REAL | DBTYPE_R4
VARBINARY | DBTYPE_BYTES
LONG VARBINARY | DBTYPE_BYTES
DATE | DBTYPE_DBDATE
TIME | DBTYPE_DBTIME
DATETIME | DBTYPE_DBTIMESTAMP
TIMESTAMP | BINARY

#### 7.5.3.2. Data Type Conversions

Applications can bind column and parameter values using data types different from those described in . In such cases VIRTOLEDB uses OLE DB Data Conversion Library. See MDAC documentation for the list of supported data type conversions.

#### 7.5.3.3. Long Data Types

Long data types include LONG VARCHAR, LONG NVARCHAR, and LONG VARBINARY. A long value can only be bound to a buffer that have one of these OLE DB types:

- DBTYPE_IUNKNOWN
- DBTYPE_STR
- DBTYPE_STR | DBTYPE_BYREF
- DBTYPE_WSTR
- DBTYPE_WSTR | DBTYPE_BYREF
- DBTYPE_BYTES
- DBTYPE_BYTES | DBTYPE_BYREF

Other type conversions are not supported.

If a long data is bound to a DBTYPE_IUNKNOWN type, this implies the use of the ISequentialStream interface. VIRTOLEDB supports the ISequentialStream::Read method both when getting and setting data. The ISequentialStream::Write method is never supported.

### 7.5.4. Metadata

#### 7.5.4.1. Schema Rowsets

VIRTOLEDB supports schema rowsets listed in the following table.

Table: 7.5.4.1.1. Supported Schema Rowsets
Schema Rowset | Supported Restrictions
--- | ---
DBSCHEMA_CATALOGS | All (CATALOG_NAME)
DBSCHEMA_COLUMN_PRIVILEGES | All (TABLE_CATALOG, TABLE_SCHEMA, TABLE_NAME, COLUMN_NAME, GRANTOR, GRANTEE)
DBSCHEMA_COLUMNS | All (TABLE_CATALOG, TABLE_SCHEMA, TABLE_NAME, COLUMN_NAME)
DBSCHEMA_FOREIGN_KEYS | All (PK_TABLE_CATALOG, PK_TABLE_SCHEMA, PK_TABLE_NAME, FK_TABLE_CATALOG, FK_TABLE_SCHEMA, FK_TABLE_NAME)
DBSCHEMA_INDEXES | 1, 2, 3, and 5 (TABLE_CATALOG, TABLE_SCHEMA, INDEX_NAME, TABLE_NAME)
DBSCHEMA_PRIMARY_KEYS | All (TABLE_CATALOG, TABLE_SCHEMA, TABLE_NAME)
DBSCHEMA_PROCEDURE_PARAMETERS | All (PROCEDURE_CATALOG, PROCEDURE_SCHEMA, PROCEDURE_NAME, PARAMETER_NAME)
DBSCHEMA_PROCEDURES | All (PROCEDURE_CATALOG, PROCEDURE_SCHEMA, PROCEDURE_NAME, PROCEDURE_TYPE)
DBSCHEMA_PROVIDER_TYPES | All (DATA_TYPE, BEST_MATCH)
DBSCHEMA_SCHEMATA | All (CATALOG_NAME, SCHEMA_NAME, SCHEMA_OWNER)
DBSCHEMA_TABLE_PRIVILEGES | All (TABLE_CATALOG, TABLE_SCHEMA, TABLE_NAME, GRANTOR, GRANTEE)
DBSCHEMA_TABLES | All (TABLE_CATALOG, TABLE_SCHEMA, TABLE_NAME, TABLE_TYPE)

#### 7.5.4.2. Columns Rowset

VIRTOLEDB supports the following columns in the columns rowset.

- DBCOLUMN_IDNAME
- DBCOLUMN_GUID
- DBCOLUMN_PROPID
- DBCOLUMN_NAME
- DBCOLUMN_NUMBER
- DBCOLUMN_TYPE
- DBCOLUMN_TYPEINFO
- DBCOLUMN_COLUMNSIZE
- DBCOLUMN_PRECISION
- DBCOLUMN_SCALE
- DBCOLUMN_FLAGS
- DBCOLUMN_BASECATALOGNAME
- DBCOLUMN_BASECOLUMNNAME
- DBCOLUMN_BASESCHEMANAME
- DBCOLUMN_BASETABLENAME
- DBCOLUMN_COMPUTEMODE
- DBCOLUMN_DATETIMEPRECISION
- DBCOLUMN_ISCASESENSITIVE
- DBCOLUMN_ISSEARCHABLE
- DBCOLUMN_OCTETLENGTH
- DBCOLUMN_KEYCOLUMN

### 7.5.5. Supported Interfaces

VIRTOLEDB supports the interfaces listed in the following table.

Table: 7.5.5.1. Supported Interfaces
Object | Interface | Notes
--- | --- | ---
Data Source | IDBCreateSession |
IDBInitialize |
IDBProperties |
IPersist |
IDBInfo |
IPersistFile |
ISupportErrorInfo |
Session | IGetDataSource |
IOpenRowset |
ISessionProperties |
IDBCreateCommand |
IDBSchemaRowset |
ISupportErrorInfo |
ITransaction |
ITransactionJoin |
ITransactionLocal |
Command | IAccessor |
IColumnsInfo |
ICommand |
ICommandProperties |
ICommandText |
IConvertType |
IColumnsRowset |
ICommandPrepare |
ICommandWithParameters |
ISupportErrorInfo |
Multiple Results | IMultipleResults |
ISupportErrorInfo |
Rowset | IAccessor |
IColumnsInfo |
IConvertType |
IRowset |
IRowsetInfo |
IColumnsRowset |
IConnectionPointContainer | For IRowsetNotify interface.
IRowsetChange |
IRowsetIdentity |
IRowsetLocate |
IRowsetRefresh |
IRowsetResynch |
IRowsetScroll |
IRowsetUpdate |
ISupportErrorInfo |
Error Lookup | IErrorLookup |

### 7.5.6. Data Source Objects

#### 7.5.6.1. Initialization and Authorization Properties

VIRTOLEDB supports the following properties in the initialization property group.

Table: 7.5.6.1.1. Supported Initialization and Authorization Properties
Property | R/W | Default | Notes
--- | --- | --- | ---
DBPROP_AUTH_PASSWORD | Read/Write |  | General Info: Password
DBPROP_AUTH_USERID | Read/Write |  | User ID
DBPROP_AUTH_PERSIST_SENSITIVE_AUTHINFO | Read/Write | VARIANT_FALSE | Persist Security Info
DBPROP_INIT_DATASOURCE | Read/Write |  | Data Source
DBPROP_INIT_CATALOG | Read/Write |  | Initial Catalog
DBPROP_INIT_PROVIDERSTRING | Read/Write |  | Extended Properties
DBPROP_INIT_HWND | Read/Write |  | Window Handle
DBPROP_INIT_PROMPT | Read/Write | DBPROMPT_COMPLETE | Prompt
DBPROP_INIT_TIMEOUT | Read/Write | 0 | Connect Timeout

In addition, VIRTOLEDB implements a provider-specific property set DBPROPSET_VIRTUOSODBINIT with the following properties

Table: 7.5.6.1.2. Provider-Specific Initialization and Authorization Properties
Property | R/W | Default | Notes
--- | --- | --- | ---
VIRTPROP_INIT_ENCRYPT | Read/Write | VARIANT_FALSE | Type: VT_BOOL Description: Encrypt Connection If this property is set to VARIANT_TRUE the provider uses SSL encrypted connections.
VIRTPROP_AUTH_PKCS12FILE | Read/Write |  | Type: VT_BSTR Description: PKCS #12 File If this property is set to a non-empty string then it is used as a name of a PKCS #12 file that authenticates the client. This also implies that the VIRTPROP_INIT_ENCRYPT property is set to VARIANT_TRUE

#### 7.5.6.2. Data Source Properties

VIRTOLEDB supports the following properties in the data source property group.

Table: 7.5.6.2.1. Supported Data Source Properties
Property | R/W | Default | Notes
--- | --- | --- | ---
DBPROP_CURRENTCATALOG | Read/Write |  | Current Catalog
DBPROP_MULTIPLECONNECTIONS | Read/Write |  | Multiple Connections

#### 7.5.6.3. Data Source Information Properties

VIRTOLEDB supports the following properties in the data source information property group.

Table: 7.5.6.3.1. Supported Data Source Information Properties
Property | R/W | Default | Notes
--- | --- | --- | ---
DBPROP_ACTIVESESSIONS | Read-Only |  | The number of connections the Virtuoso server is licensed to.
DBPROP_ASYNCTXNABORT | Read-Only | VARIANT_FALSE | VIRTOLEDB cannot abort transactions asynchronously.
DBPROP_ASYNCTXNCOMMIT | Read-Only | VARIANT_FALSE | VIRTOLEDB cannot commit transactions asynchronously.
DBPROP_BYREFACCESSORS | Read-Only | VARIANT_FALSE | VIRTOLEDB does not support reference accessors.
DBPROP_CATALOGLOCATION | Read-Only | DBPROPVAL_CL_START |
DBPROP_CATALOGTERM | Read-Only | "qualifier" |
DBPROP_CATALOGUSAGE | Read-Only | DBPROPVAL_CU_DML_STATEMENTS | DBPROPVAL_CU_TABLE_DEFINITION | DBPROPVAL_CU_INDEX_DEFINITION | DBPROPVAL_CU_PRIVILEGE_DEFINITION |
DBPROP_COLUMNDEFINITION | Read-Only | DBPROPVAL_CD_NOTNULL |
DBPROP_COMSERVICES | Read-Only | 0 |
DBPROP_CONCATNULLBEHAVIOR | Read-Only | DBPROPVAL_CB_NULL |
DBPROP_CONNECTIONSTATUS | Read-Only | DBPROPVAL_CS_INITIALIZED |
DBPROP_DATASOURCENAME | Read-Only | N/A |
DBPROP_DATASOURCEREADONLY | Read-Only | VARIANT_FALSE |
DBPROP_DATASOURCE_TYPE | Read-Only | DBPROPVAL_DST_TDP |
DBPROP_DBMSNAME | Read-Only | "Virtuoso" |
DBPROP_DBMSVER | Read-Only |  |
DBPROP_DSOTHREADMODEL | Read-Only | DBPROPVAL_RT_FREETHREAD |
DBPROP_GROUPBY | Read-Only | DBPROPVAL_GB_NO_RELATION |
DBPROP_HETEROGENEOUSTABLES | Read-Only | DBPROPVAL_HT_DIFFERENT_CATALOGS |
DBPROP_IDENTIFIERCASE | Read-Only | DBPROPVAL_IC_SENSITIVE |
DBPROP_MAXINDEXSIZE | Read-Only | 2000 |
DBPROP_MAXOPENCHAPTERS | Read-Only | 0 |
DBPROP_MAXROWSIZE | Read-Only | 2000 |
DBPROP_MAXROWSIZEINCLUDESBLOB | Read-Only | VARIANT_FALSE |
DBPROP_MAXTABLESINSELECT | Read-Only | 0 |
DBPROP_MULTIPLEPARAMSETS | Read-Only | VARIANT_TRUE |
DBPROP_MULTIPLERESULTS | Read-Only | DBPROPVAL_MR_SUPPORTED |
DBPROP_MULTIPLESTORAGEOBJECTS | Read-Only | VARIANT_FALSE |
DBPROP_MULTITABLEUPDATE | Read-Only | VARIANT_TRUE |
DBPROP_NULLCOLLATION | Read-Only | DBPROPVAL_NC_HIGH |
DBPROP_OLEOBJECTS | Read-Only | DBPROPVAL_OO_BLOB |
DBPROP_OPENROWSETSUPPORT | Read-Only | DBPROPVAL_ORS_TABLE |
DBPROP_ORDERBYCOLUMNSINSELECT | Read-Only | VARIANT_FALSE |
DBPROP_OUTPUTPARAMETERAVAILABILITY | Read-Only | DBPROPVAL_OA_ATROWRELEASE |
DBPROP_PERSISTENTIDTYPE | Read-Only | DBPROPVAL_PT_NAME |
DBPROP_PREPAREABORTBEHAVIOR | Read-Only | DBPROPVAL_CB_PRESERVE |
DBPROP_PREPARECOMMITBEHAVIOR | Read-Only | DBPROPVAL_CB_PRESERVE |
DBPROP_PROCEDURETERM | Read-Only | "procedure" |
DBPROP_PROVIDERFRIENDLYNAME | Read-Only | "OpenLink OLE DB Provider for Virtuoso" |
DBPROP_PROVIDERMEMORY | Read-Only | VARIANT_TRUE |
DBPROP_PROVIDERFILENAME | Read-Only | "virtoledb.dll" |
DBPROP_PROVIDEROLEDBVER | Read-Only | "02.60" |
DBPROP_PROVIDERVER | Read-Only |  |
DBPROP_QUOTEDIDENTIFIERCASE | Read-Only | DBPROPVAL_IC_SENSITIVE |
DBPROP_ROWSETCONVERSIONSONCOMMAND | Read-Only | VARIANT_TRUE |
DBPROP_SCHEMATERM | Read-Only | "owner" |
DBPROP_SCHEMAUSAGE | Read-Only | DBPROPVAL_SU_DML_STATEMENTS | DBPROPVAL_SU_TABLE_DEFINITION | DBPROPVAL_SU_INDEX_DEFINITION | DBPROPVAL_SU_PRIVILEGE_DEFINITION |
DBPROP_SERVERNAME | Read-Only |  |
DBPROP_SQLSUPPORT | Read-Only | DBPROPVAL_SQL_ODBC_MINIMUM | DBPROPVAL_SQL_ODBC_CORE | DBPROPVAL_SQL_ANSI89_IEF | DBPROPVAL_SQL_ESCAPECLAUSES | DBPROPVAL_SQL_ANSI92_ENTRY |
DBPROP_STRUCTUREDSTORAGE | Read-Only | DBPROPVAL_SS_ISEQUENTIALSTREAM |
DBPROP_SUBQUERIES | Read-Only | DBPROPVAL_SQ_CORRELATEDSUBQUERIES | DBPROPVAL_SQ_COMPARISON | DBPROPVAL_SQ_EXISTS | DBPROPVAL_SQ_IN | DBPROPVAL_SQ_QUANTIFIED | DBPROPVAL_SQ_TABLE |
DBPROP_SUPPORTEDTXNDDL | Read-Only | DBPROPVAL_TC_DML |
DBPROP_SUPPORTEDTXNISOLEVELS | Read-Only | DBPROPVAL_TI_READUNCOMMITTED | DBPROPVAL_TI_READCOMMITTED | DBPROPVAL_TI_REPEATABLEREAD | DBPROPVAL_TI_SERIALIZABLE |
DBPROP_SUPPORTEDTXNISORETAIN | Read-Only | DBPROPVAL_TR_DONTCARE |
DBPROP_TABLESTATISTICS | Read-Only | 0 |
DBPROP_TABLETERM | Read-Only | "table" |
DBPROP_USERNAME | Read-Only | N/A |

### 7.5.7. Sessions

#### 7.5.7.1. Session Properties

VIRTOLEDB supports the following properties in the session property group.

Table: 7.5.7.1.1. Supported Session Properties
Property | R/W | Default | Notes
--- | --- | --- | ---
DBPROP_SESS_AUTOCOMMITISOLEVELS | Read/Write | DBPROPVAL_TI_REPEATABLEREAD | Isolation level in auto-commit mode.

### 7.5.8. Rowsets

#### 7.5.8.1. Properties

Table: 7.5.8.1.1. Supported Rowset Properties
Property | R/W | Default | Notes
--- | --- | --- | ---
DBPROP_ABORTPRESERVE | Read/Write |  |
DBPROP_ACCESSORDER | Read-Only | DBPROPVAL_AO_RANDOM |
DBPROP_BLOCKINGSTORAGEOBJECTS | Read-Only | VARIANT_TRUE |
DBPROP_BOOKMARKINFO | Read-Only | DBPROPVAL_BI_CROSSROWSET |
DBPROP_BOOKMARKS | Read/Write | VARIANT_FALSE |
DBPROP_BOOKMARKSKIPPED | Read-Only | VARIANT_FALSE |
DBPROP_BOOKMARKTYPE | Read-Only | DBPROPVAL_BMK_NUMERIC |
DBPROP_CACHEDEFERRED | Read-Only | VARIANT_FALSE |
DBPROP_CANFETCHBACKWARDS | Read/Write | VARIANT_FALSE |
DBPROP_CANHOLDROWS | Read/Write | VARIANT_FALSE |
DBPROP_CANSCROLLBACKWARDS | Read/Write | VARIANT_FALSE |
DBPROP_CHANGEINSERTEDROWS | Read-Only | VARIANT_FALSE |
DBPROP_COLUMNRESTRICT | Read-Only | VARIANT_FALSE |
DBPROP_COMMANDTIMEOUT | Read/Write |  |
DBPROP_COMMITPRESERVE | Read/Write | VARIANT_FALSE |
DBPROP_DEFERRED | Read-Only | VARIANT_FALSE or VARIANT_TRUE |
DBPROP_DELAYSTORAGEOBJECTS | Read/Write | VARIANT_FALSE |
DBPROP_FINDCOMPAREOPS | Read-Only | 0 |
DBPROP_HIDDENCOLUMNS | Read-Only |  |
DBPROP_IAccessor | Read-Only | VARIANT_TRUE |
DBPROP_IColumnsInfo | Read-Only | VARIANT_TRUE |
DBPROP_IColumnsRowset | Read/Write | VARIANT_FALSE |
DBPROP_IConnectionPointContainer | Read/Write | VARIANT_FALSE |
DBPROP_IConvertType | Read-Only | VARIANT_TRUE |
DBPROP_IMMOBILEROWS | Read/Write | VARIANT_FALSE |
DBPROP_IMultipleResults | Read/Write | VARIANT_FALSE |
DBPROP_IRowset | Read-Only | VARIANT_TRUE |
DBPROP_IRowsetChange | Read/Write | VARIANT_FALSE |
DBPROP_IRowsetIdentity | Read/Write | VARIANT_FALSE |
DBPROP_IRowsetInfo | Read-Only | VARIANT_TRUE |
DBPROP_IRowsetLocate | Read/Write | VARIANT_FALSE |
DBPROP_IRowsetRefresh | Read/Write | VARIANT_FALSE |
DBPROP_IRowsetResynch | Read/Write | VARIANT_FALSE |
DBPROP_IRowsetScroll | Read/Write | VARIANT_FALSE |
DBPROP_IRowsetUpdate | Read/Write | VARIANT_FALSE |
DBPROP_ISequentialStream | Read-Only | VARIANT_TRUE |
DBPROP_ISupportErrorInfo | Read/Write | VARIANT_FALSE |
DBPROP_LITERALBOOKMARKS | Read-Only | VARIANT_FALSE |
DBPROP_LITERALIDENTITY | Read-Only | VARIANT_TRUE |
DBPROP_LOCKMODE | Read/Write | DBPROPVAL_LM_NONE |
DBPROP_MAXOPENROWS | Read-Only | 0 |
DBPROP_MAXPENDINGROWS | Read-Only | 0 |
DBPROP_MAXROWS | Read/Write | 0 |
DBPROP_NOTIFICATIONGRANULARITY | Read-Only | DBPROPVAL_NT_SINGLEROW |
DBPROP_NOTIFICATIONPHASES | Read-Only | DBPROPVAL_NP_OKTODO | DBPROPVAL_NP_ABOUTTODO | DBPROPVAL_NP_SYNCHAFTER | DBPROPVAL_NP_FAILEDTODO | DBPROPVAL_NP_DIDEVENT |
DBPROP_NOTIFYCOLUMNSET DBPROP_NOTIFYROWDELETE DBPROP_NOTIFYROWFIRSTCHANGE DBPROP_NOTIFYROWINSERT DBPROP_NOTIFYROWRESYNCH DBPROP_NOTIFYROWSETCHANGED DBPROP_NOTIFYROWSETFETCHPOSITIONCHANGE DBPROP_NOTIFYROWSETRELEASE DBPROP_NOTIFYROWUNDOCHANGE DBPROP_NOTIFYROWUNDODELETE DBPROP_NOTIFYROWUNDOINSERT DBPROP_NOTIFYROWUPDATE | Read-Only | DBPROPVAL_NP_OKTODO | DBPROPVAL_NP_ABOUTTODO | DBPROPVAL_NP_SYNCHAFTER |
DBPROP_ORDEREDBOOKMARKS | Read/Write | VARIANT_FALSE |
DBPROP_OTHERINSERT | Read/Write | VARIANT_FALSE |
DBPROP_OTHERUPDATEDELETE | Read/Write | VARIANT_FALSE |
DBPROP_OWNINSERT | Read/Write | VARIANT_TRUE |
DBPROP_OWNUPDATEDELETE | Read/Write | VARIANT_TRUE |
DBPROP_QUICKRESTART | Read/Write | VARIANT_FALSE |
DBPROP_REENTRANTEVENTS | Read-Only | VARIANT_FALSE |
DBPROP_REMOVEDELETED | Read/Write | VARIANT_FALSE |
DBPROP_REPORTMULTIPLECHANGES | Read-Onle | VARIANT_FALSE |
DBPROP_RETURNPENDINGINSERTS | Read-Only | VARIANT_FALSE |
DBPROP_ROWRESTRICT | Read-Only | VARIANT_FALSE |
DBPROP_ROWSET_ASYNCH | Read-Only | VARIANT_FALSE |
DBPROP_ROWTHREADMODEL | Read-Only | DBPROPVAL_RT_FREETHREAD |
DBPROP_SERVERCURSOR | Read-Only | VARIANT_TRUE |
DBPROP_SERVERDATAONINSERT | Read-Only | VARIANT_FALSE |
DBPROP_SKIPROWCOUNTRESULTS | Read-Only | VARIANT_TRUE |
DBPROP_STRONGIDENTITY | Read-Only | VARIANT_FALSE |
DBPROP_TRANSACTEDOBJECT | Reaq-Only | VARIANT_FALSE |
DBPROP_UNIQUEROWS | Read/Write | VARIANT_FALSE |
DBPROP_UPDATABILITY | Read/Write | 0 |

#### 7.5.8.2. Interfaces

VIRTOLEDB supports the following rowset interfaces.

Table: 7.5.8.2.1. Supported Rowset Interfaces
Interface | Description
--- | ---
IAccessor |
IColumnsInfo |
IConvertType |
IRowset |
IRowsetChange |
IRowsetIdentity |
IRowsetInfo |
IRowsetLocate |
IRowsetScroll |
ISupportErrorInfo |

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