Rowset Properties (OLE DB)

Article
09/27/2010

The DBPROPSET_ROWSET property set contains the following properties. All these properties are in the Rowset property group. Additional properties are defined in DBPROPSET_SSCE_ROWSET.

Property ID	Description
DBPROP_ABORTPRESERVE	Type: VT_BOOL Typical R/W: R only Description: Preserve on Abort Notes: For this provider, the value is always VARIANT_FALSE. This indicates that, after aborting a transaction, the only operations allowed on a rowset are to release row and accessor handles and to release the rowset.
DBPROP_ACCESSORDER	Type: VT_I4 R/W: R only Description: Access Order Notes: For this provider, the value is always DBPROPVAL_AO_RANDOM.
DBPROP_BLOCKINGSTORAGEOBJECTS	Type: VT_BOOL Typical R/W: R only Description: Blocking Storage Objects Notes: For this provider, the value is always VARIANT_TRUE.
DBPROP_BOOKMARKS	Type: VT_BOOL Typical R/W: R/W Description: Use Bookmarks Notes: Specifies whether the rowset supports bookmarks. The provider supports the following values: VARIANT_TRUE, which indicates that the rowset supports bookmarks. Column 0 is the bookmark for the rows. Getting this column obtains a bookmark value. This can be used to reposition to the row. VARIANT_FALSE, which indicates that the rowset does not support bookmarks. The rowset is sequential, and the values of the DBPROP_LITERALBOOKMARKS and DBPROP_ORDEREDBOOKMARKS properties are ignored.
DBPROP_BOOKMARKTYPE	Type: VT_UI4 Typical R/W: R only Description: Bookmark Type Notes: Specifies the bookmark type supported by the rowset. For this provider, the value is always DBPROPVAL_BMK_NUMERIC. This indicates that the bookmark type is numeric. Numeric bookmarks are based on a row's properties and are not dependent on the values of the row's columns. For example, a numeric bookmark can be based on the absolute position of the row within the rowset, or on a row ID that the storage engine assigned to a row when it was created. Modifying the row's columns does not change the validity of numeric bookmarks. Bookmarks are of type DBTYPE_UI4. In versions prior to SQL Server Compact 3.5, bookmarks were of type DBTYPE_I4
DBPROP_CANFETCHBACKWARDS	Type: VT_BOOL Typical R/W: R/W Description: Fetch Backward Notes: Specifies whether the rowset can fetch backward. The provider supports the following values: VARIANT_TRUE, which indicates that cRows in IRowset::GetNextRows can be negative. When it is negative, this method fetches rows backward from the specified row. VARIANT_FALSE, which indicates that cRows must be nonnegative.
DBPROP_CANHOLDROWS	Type: VT_BOOL Typical R/W: R Description: Hold Rows Notes: For this provider, this property is always VARIANT_FALSE.
DBPROP_CANSCROLLBACKWARDS	Type: VT_BOOL Typical R/W: R Description: Scroll Backward Notes: For this provider, this property is always VARIANT_FALSE. This indicates that IRowsOffset must be nonnegative.
DBPROP_CHANGEINSERTEDROWS	Type: VT_BOOL Typical R/W: R Description: Change Inserted Rows Notes: For this provider, the value is always VARIANT_TRUE. This indicates that the consumer can call IRowsetChange::DeleteRows or IRowsetChange::SetData for newly inserted rows. A newly inserted row is defined as a row for which the insertion has been transmitted to the data storeinstead of a pending insert row.
DBPROP_COMMITPRESERVE	Type: VT_BOOL Typical R/W: R only Description: Preserve On Commit Notes: For this provider, the value is always VARIANT_TRUE. This indicates that after a commit that preserves, the rowset remains active. That is, you can fetch new rows, update, delete, and insert rows, and so on.
DBPROP_DEFERRED	Type: VT_BOOL Typical R/W: R only Description: Defer Column Notes: For this provider, the value is always VARIANT_TRUE. This indicates that the data in the column is not fetched until an accessor is used on the column.
DBPROP_DELAYSTORAGEOBJECTS	Type: VT_BOOL Typical R/W: R only Description: Delay Storage Object Updates Notes: For this provider, the value is always VARIANT_TRUE. This indicates that storage objects are also used in delayed update mode.
DBPROP_IAccessor DBPROP_IColumnsInfo DBPROP_IConvertType DBPROP_IRowset DBPROP_IRowsetChange DBPROP_IRowsetInfo DBPROP_IRowsetUpdate DBPROP_ISupportErrorInfo DBPROP_IRowsetIndex DBPROP_IRowsetCurrentIndex DBPROP_IRowsetBookmark	Type: VT_BOOL Typical R/W: R/W, except as noted below. Notes: If the value of any one of these properties is set to VARIANT_TRUE, the rowset supports the specified interface. These properties are primarily used to request interfaces through ICommandProperties::SetProperties. The following properties are read-only and are always VARIANT_TRUE: DBPROP_IAccessor DBPROP_IColumnsInfo BPROP_IConvertType DBPROP_IRowset DBPROP_IRowsetInfo DBPROP_ISupportErrorInfo Setting DBPROP_IRowsetUpdate to VARIANT_TRUE automatically sets DBPROP_IRowsetChange to VARIANT_TRUE. Setting DBPROP_IRowsetCurrentIndex to VARIANT_TRUE automatically sets DBPROP_IRowsetIndex to VARIANT_TRUE.
DBPROP_ILockBytes DBPROP_ISequentialStream	Type: VT_BOOL Typical R/W: R/W Notes: If the value of this property is set to VARIANT_TRUE, the specified column is treated as a storage object that reveals the specified interface.
DBPROP_IMMOBILEROWS	Type: VT_BOOL Typical R/W: R only Description: Immobile Rows Notes: For this provider, the value is always VARIANT_FALSE. This indicates that, if the rowset is ordered, inserted rows and updated rows (where one or more of the columns in the ordering criteria are updated) follow the ordering criteria of the rowset. If the rowset is not ordered, inserted rows are not guaranteed to appear in a determinate position, and the position of updated rows is not changed. This property is meaningful only if DBPROP_OWNINSERT is VARIANT_TRUE.
DBPROP_LOCKMODE	TYPE: VT_I4 R/W: R Description: Lock Mode Notes: For this provider, the value is always DBPROPVAL_LM_SINGLEROW.
DBPROP_MAXOPENROWS	Type: VT_I4 Typical R/W: R Description: Maximum Open Rows Notes: This value is 1 for SQL Server Compact 3.5.
DBPROP_MAXROWS	Type: VT_I4 Typical R/W: R only Description: Maximum Rows Notes: Specifies the maximum number of rows that can be returned in a rowset. If there is no limit, this value is 0. For this provider, the value is always 0.
DBPROP_OTHERINSERT	Type: VT_BOOL Typical R/W: R/W Description: Other's Insert. Notes: Base Tables are True; others are False.
DBPROP_OTHERUPDATEDELETE	Type: VT_BOOL Typical R/W: R/W Description: Others' Changes Visible Notes: Specifies either of the following values: VARIANT_TRUE, which indicates that the rowset can see updates and deletes made by a user other than a consumer of the rowset. For example, suppose a user other than a consumer of the rowset updates the data underlying a row or deletes the row. If the row is released entirely, any consumer of the rowset will see that change the next time it fetches the row. This includes updates and deletes made by other parties in the same transaction and as updates and deletes by parties outside the transaction. The transaction isolation level does not affect the ability of the rowset to see updates or deletes by other parties in the same transaction, such as other rowsets in the same session. However, it does restrict the ability of the rowset to see updates or deletes by parties outside the transaction. VARIANT_FALSE, which indicates that the rowset cannot see updates and deletes by others.
DBPROP_OWNINSERT	Type: VT_BOOL Typical R/W: R/W Description: Own Inserts Visible
DBPROP_OWNUPDATEDELETE	Type: VT_BOOL Typical R/W: R/W Description: Own Changes Visible
DBPROP_QUICKRESTART	Type: VT_BOOL Typical R/W: R / W Description: Quick Restart
DBPROP_REMOVEDELETED	Type: VT_BOOL Typical R/W: R Description: Remove Deleted Rows Notes: For this provider, the value is always VARIANT_TRUE.
DBPROP_REPORTMULTIPLECHANGES	Type: VT_BOOL Typical R/W: R only Description: Report Multiple Changes Notes: For this provider, the value is always VARIANT_TRUE.
DBPROP_ROWTHREADMODEL	Type: VT_I4 Typical R/W: R only Description: Row Threading Model Specifies the threading model of the rowsets generated by the command. For this provider, the value is always DBPROPVAL_RT_SINGLETHREAD.
DBPROP_SERVERDATAONINSERT	TYPE: VT_BOOL R/W: R Description: Server Data on Insert Notes: For this provider, the value is always VARIANT_TRUE.
DBPROP_UPDATABILITY	Type: VT_I4 Typical R/W: R/W Description: Updatability

Share via

Additional resources