Microsoft OLE DB Provider for Microsoft Jet

The OLE DB Provider for Microsoft Jet allows ADO to access Microsoft Jet databases.

To connect to this provider, set the Provider argument of the ConnectionString property to the following:

Microsoft.Jet.OLEDB.4.0

Reading the Provider property will also return this string.

A typical connection string for this provider is:

"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=databaseName;User ID=MyUserID;Password=MyPassword;"

The string consists of these keywords:

Keyword

Description

Provider

Specifies the OLE DB Provider for Microsoft Jet.

Data Source

Specifies the database path and file name (for example, c:\Northwind.mdb).

User ID

Specifies the user name. If this keyword is not specified, the string, "admin", is used by default.

Password

Specifies the user password. If this keyword is not specified, the empty string (""), is used by default.

NoteNote

If you are connecting to a data source provider that supports Windows authentication, you should specify Trusted_Connection=yes or Integrated Security = SSPI instead of user ID and password information in the connection string.

The OLE DB Provider for Microsoft Jet supports several provider-specific dynamic properties in addition to those that are defined by ADO. As with all other Connection parameters, they can be set by using the Properties collection of the Connection object or as part of the connection string.

The following table lists these properties together with the corresponding OLE DB property name in parentheses.

Parameter

Description

Jet OLEDB:Compact Reclaimed Space Amount (DBPROP_JETOLEDB_COMPACTFREESPACESIZE)

Indicates an estimate of the amount of space, in bytes, that can be reclaimed by compacting the database. This value is only valid after a database connection has been established.

Jet OLEDB:Connection Control (DBPROP_JETOLEDB_CONNECTIONCONTROL)

Indicates whether users can connect to the database.

Jet OLEDB:Create System Database (DBPROP_JETOLEDB_CREATESYSTEMDATABASE)

Indicates whether a system database should be created when creating a new data source.

Jet OLEDB:Database Locking Mode (DBPROP_JETOLEDB_DATABASELOCKMODE)

Indicates the locking mode for this database. The first user to open the database determines the mode used while the database is open.

Jet OLEDB:Database Password (DBPROP_JETOLEDB_DATABASEPASSWORD)

Indicates the database password.

Jet OLEDB:Don't Copy Locale on Compact (DBPROP_JETOLEDB_COMPACT_DONTCOPYLOCALE)

Indicates whether Jet should copy locale information when compacting a database.

Jet OLEDB:Encrypt Database (DBPROP_JETOLEDB_ENCRYPTDATABASE)

Indicates whether a compacted database should be encrypted. If this property is not set, the compacted database will be encrypted if the original database was also encrypted.

Jet OLEDB:Engine Type (DBPROP_JETOLEDB_ENGINE)

Indicates the storage engine used to access the current data store.

Jet OLEDB:Exclusive Async Delay (DBPROP_JETOLEDB_EXCLUSIVEASYNCDELAY)

Indicates the maximum length of time, in milliseconds, that Jet can delay asynchronous writes to disk when the database is opened exclusively.

This property is ignored unless Jet OLEDB:Flush Transaction Timeout is set to 0.

Jet OLEDB:Flush Transaction Timeout (DBPROP_JETOLEDB_FLUSHTRANSACTIONTIMEOUT)

Indicates the amount of time to wait before data stored in a cache for asynchronous writing is actually written to disk. This setting overrides the values for Jet OLEDB:Shared Async Delay and Jet OLEDB:Exclusive Async Delay.

Jet OLEDB:Global Bulk Transactions (DBPROP_JETOLEDB_GLOBALBULKNOTRANSACTIONS)

Indicates whether SQL bulk transactions are transacted.

Jet OLEDB:Global Partial Bulk Ops (DBPROP_JETOLEDB_GLOBALBULKPARTIAL)

Indicates the password used to open the database.

Jet OLEDB:Implicit Commit Sync (DBPROP_JETOLEDB_IMPLICITCOMMITSYNC)

Indicates whether changes that were made in internal implicit transactions are written in synchronous or asynchronous mode.

Jet OLEDB:Lock Delay (DBPROP_JETOLEDB_LOCKDELAY)

Indicates the number of milliseconds to wait before trying to acquire a lock after a previous attempt has failed.

Jet OLEDB:Lock Retry (DBPROP_JETOLEDB_LOCKRETRY)

Indicates how many times an attempt to access a locked page is repeated.

Jet OLEDB:Max Buffer Size (DBPROP_JETOLEDB_MAXBUFFERSIZE)

Indicates the maximum amount of memory, in kilobytes, Jet can use before it starts flushing changes to disk.

Jet OLEDB:Max Locks Per File (DBPROP_JETOLEDB_MAXLOCKSPERFILE)

Indicates the maximum number of locks Jet can place on a database. The default value is 9500.

Jet OLEDB:New Database Password (DBPROP_JETOLEDB_NEWDATABASEPASSWORD)

Indicates the new password to be set for this database. The old password is stored in Jet OLEDB:Database Password.

Jet OLEDB:ODBC Command Time Out (DBPROP_JETOLEDB_ODBCCOMMANDTIMEOUT)

Indicates the number of milliseconds before a remote ODBC query from Jet will time out.

Jet OLEDB:Page Locks to Table Lock (DBPROP_JETOLEDB_PAGELOCKSTOTABLELOCK)

Indicates how many pages must be locked within a transaction before Jet tries to promote the lock to a table lock. If this value is 0, the lock is never promoted.

Jet OLEDB:Page Timeout (DBPROP_JETOLEDB_PAGETIMEOUT)

Indicates the number of milliseconds Jet will wait before checking to see whether its cache is out of date with the database file.

Jet OLEDB:Recycle Long-Valued Pages (DBPROP_JETOLEDB_RECYCLELONGVALUEPAGES)

Indicates whether Jet should aggressively try to reclaim BLOB pages when they are freed.

Jet OLEDB:Registry Path (DBPROP_JETOLEDB_REGPATH)

Indicates the Windows registry key that contains values for the Jet database engine.

Jet OLEDB:Reset ISAM Stats (DBPROP_JETOLEDB_RESETISAMSTATS)

Indicates whether the schema Recordset DBSCHEMA_JETOLEDB_ISAMSTATS should reset its performance counters after it returns performance information.

Jet OLEDB:Shared Async Delay (DBPROP_JETOLEDB_SHAREDASYNCDELAY)

Indicates the maximum amount of time, in milliseconds, Jet can delay asynchronous writes to disk when the database is opened in multiuser mode.

Jet OLEDB:System Database (DBPROP_JETOLEDB_SYSDBPATH)

Indicates the path and file name for the workgroup information file (system database).

Jet OLEDB:Transaction Commit Mode (DBPROP_JETOLEDB_TXNCOMMITMODE)

Indicates whether Jet writes data to disk synchronously or asynchronously when a transaction is committed.

Jet OLEDB:User Commit Sync (DBPROP_JETOLEDB_USERCOMMITSYNC)

Indicates whether changes that were made in transactions are written in synchronous or asynchronous mode.

The Jet provider also supports several provider-specific Recordset and Command properties. These properties are accessed and set through the Properties collection of the Recordset or Command object. The table lists the ADO property name and its corresponding OLE DB property name in parentheses.

Property Name

Description

Jet OLEDB:Bulk Transactions (DBPROP_JETOLEDB_BULKNOTRANSACTIONS)

Indicates whether SQL bulk operations are transacted. Large bulk operations might fail when transacted, because of resource delays.

Jet OLEDB:Enable Fat Cursors (DBPROP_JETOLEDB_ENABLEFATCURSOR)

Indicates whether Jet should cache multiple rows when populating a recordset for remote row sources.

Jet OLEDB:Fat Cursor Cache Size (DBPROP_JETOLEDB_FATCURSORMAXROWS)

Indicates the number of rows to cache when using remote data store row caching. This value is ignored unless Jet OLEDB:Enable Fat Cursors is True.

Jet OLEDB:Inconsistent (DBPROP_JETOLEDB_INCONSISTENT)

Indicates whether query results allow inconsistent updates.

Jet OLEDB:Locking Granularity (DBPROP_JETOLEDB_LOCKGRANULARITY)

Indicates whether a table is opened using row-level locking.

Jet OLEDB:ODBC Pass-Through Statement (DBPROP_JETOLEDB_ODBCPASSTHROUGH)

Indicates that Jet should pass the SQL text in a Command object to the back end unaltered.

Jet OLEDB:Partial Bulk Ops (DBPROP_JETOLEDB_BULKPARTIAL)

Indicates Jet's behavior when SQL DML operations fail.

Jet OLEDB:Pass Through Query Bulk-Op (DBPROP_JETOLEDB_PASSTHROUGHBULKOP)

Indicates whether queries that do not return a Recordset are passed unaltered to the data source.

Jet OLEDB:Pass Through Query Connect String (DBPROP_JETOLEDB_ODBCPASSTHROUGHCONNECTSTRING)

Indicates the Jet connect string used to connect to a remote data store. This value is ignored unless Jet OLEDB:ODBC Pass-Through Statement is True.

Jet OLEDB:Stored Query (DBPROP_JETOLEDB_STOREDQUERY)

Indicates whether the command text should be interpreted as a stored query instead of an SQL command.

Jet OLEDB:Validate Rules On Set (DBPROP_JETOLEDB_VALIDATEONSET)

Indicates whether the Jet validation rules are evaluated when column data is set or when the changes are committed to the database.

By default, the OLE DB Provider for Microsoft Jet opens Microsoft Jet databases in read/write mode. To open a database in read-only mode, set the Mode property on the ADO Connection object to adModeRead.

Command text in the Command object uses the Microsoft Jet SQL dialect. You can specify row-returning queries, action queries, and table names in the command text; however, stored procedures are not supported and should not be specified.

The Microsoft Jet database engine does not support dynamic cursors. Therefore, the OLE DB Provider for Microsoft Jet does not support the adLockDynamic cursor type. When a dynamic cursor is requested, the provider will return a keyset cursor and reset the CursorType property to indicate the type of Recordset returned. Further, if an updatable Recordset is requested (LockType is adLockOptimistic, adLockBatchOptimistic, or adLockPessimistic) the provider will also return a keyset cursor and reset the CursorType property.

The OLE DB Provider for Microsoft Jet inserts several dynamic properties into the Properties collection of the unopened Connection, Recordset, and Command objects.

The following tables are a cross-index of the ADO and OLE DB names for each dynamic property. The OLE DB Programmer's Reference refers to an ADO property name by the term, "Description." You can find more information about these properties in the OLE DB Programmer's Reference. Search for the OLE DB property name in the Index or see Appendix C: OLE DB Properties.

The following properties are added to the Properties collection of the Connection object.

ADO Property Name

OLE DB Property Name

Active Sessions

DBPROP_ACTIVESESSIONS

Asynchable Abort

DBPROP_ASYNCTXNABORT

Asynchable Commit

DBPROP_ASYNCTNXCOMMIT

Autocommit Isolation Levels

DBPROP_SESS_AUTOCOMMITISOLEVELS

Catalog Location

DBPROP_CATALOGLOCATION

Catalog Term

DBPROP_CATALOGTERM

Column Definition

DBPROP_COLUMNDEFINITION

Current Catalog

DBPROP_CURRENTCATALOG

Data Source

DBPROP_INIT_DATASOURCE

Data Source Name

DBPROP_DATASOURCENAME

Data Source Object Threading Model

DBPROP_DSOTHREADMODEL

DBMS Name

DBPROP_DBMSNAME

DBMS Version

DBPROP_DBMSVER

GROUP BY Support

DBPROP_GROUPBY

Heterogeneous Table Support

DBPROP_HETEROGENEOUSTABLES

Identifier Case Sensitivity

DBPROP_IDENTIFIERCASE

Isolation Levels

DBPROP_SUPPORTEDTXNISOLEVELS

Isolation Retention

DBPROP_SUPPORTEDTXNISORETAIN

Locale Identifier

DBPROP_INIT_LCID

Maximum Index Size

DBPROP_MAXINDEXSIZE

Maximum Row Size

DBPROP_MAXROWSIZE

Maximum Row Size Includes BLOB

DBPROP_MAXROWSIZEINCLUDESBLOB

Maximum Tables in SELECT

DBPROP_MAXTABLESINSELECT

Mode

DBPROP_INIT_MODE

Multiple Parameter Sets

DBPROP_MULTIPLEPARAMSETS

Multiple Results

DBPROP_MULTIPLERESULTS

Multiple Storage Objects

DBPROP_MULTIPLESTORAGEOBJECTS

Multi-Table Update

DBPROP_MULTITABLEUPDATE

NULL Collation Order

DBPROP_NULLCOLLATION

NULL Concatenation Behavior

DBPROP_CONCATNULLBEHAVIOR

OLE DB Version

DBPROP_PROVIDEROLEDBVER

OLE Object Support

DBPROP_OLEOBJECTS

Open Rowset Support

DBPROP_OPENROWSETSUPPORT

ORDER BY Columns in Select List

DBPROP_ORDERBYCOLUMNSINSELECT

Output Parameter Availability

DBPROP_OUTPUTPARAMETERAVAILABILITY

Pass By Ref Accessors

DBPROP_BYREFACCESSORS

Password

DBPROP_AUTH_PASSWORD

Persistent ID Type

DBPROP_PERSISTENTIDTYPE

Prepare Abort Behavior

DBPROP_PREPAREABORTBEHAVIOR

Prepare Commit Behavior

DBPROP_PREPARECOMMITBEHAVIOR

Procedure Term

DBPROP_PROCEDURETERM

Prompt

DBPROP_INIT_PROMPT

Provider Friendly Name

DBPROP_PROVIDERFRIENDLYNAME

Provider Name

DBPROP_PROVIDERFILENAME

Provider Version

DBPROP_PROVIDERVER

Read-Only Data Source

DBPROP_DATASOURCEREADONLY

Rowset Conversions on Command

DBPROP_ROWSETCONVERSIONSONCOMMAND

Schema Term

DBPROP_SCHEMATERM

Schema Usage

DBPROP_SCHEMAUSAGE

SQL Support

DBPROP_SQLSUPPORT

Structured Storage

DBPROP_STRUCTUREDSTORAGE

Subquery Support

DBPROP_SUBQUERIES

Table Term

DBPROP_TABLETERM

Transaction DDL

DBPROP_SUPPORTEDTXNDDL

User ID

DBPROP_AUTH_USERID

User Name

DBPROP_USERNAME

Window Handle

DBPROP_INIT_HWND

The following properties are added to the Properties collection of the Recordset object.

ADO Property Name

OLE DB Property Name

Access Order

DBPROP_ACCESSORDER

Append-Only Rowset

DBPROP_APPENDONLY

Blocking Storage Objects

DBPROP_BLOCKINGSTORAGEOBJECTS

Bookmark Type

DBPROP_BOOKMARKTYPE

Bookmarkable

DBPROP_IROWSETLOCATE

Bookmarks Ordered

DBPROP_ORDEREDBOOKMARKS

Cache Deferred Columns

DBPROP_CACHEDEFERRED

Change Inserted Rows

DBPROP_CHANGEINSERTEDROWS

Column Privileges

DBPROP_COLUMNRESTRICT

Column Set Notification

DBPROP_NOTIFYCOLUMNSET

Column Writable

DBPROP_MAYWRITECOLUMN

Defer Column

DBPROP_DEFERRED

Delay Storage Object Updates

DBPROP_DELAYSTORAGEOBJECTS

Fetch Backwards

DBPROP_CANFETCHBACKWARDS

Hold Rows

DBPROP_CANHOLDROWS

IAccessor

DBPROP_IAccessor

IColumnsInfo

DBPROP_IColumnsInfo

IColumnsRowset

DBPROP_IColumnsRowset

IConnectionPointContainer

DBPROP_IConnectionPointContainer

IConvertType

DBPROP_IConvertType

ILockBytes

DBPROP_ILockBytes

Immobile Rows

DBPROP_IMMOBILEROWS

IRowset

DBPROP_IRowset

IRowsetChange

DBPROP_IRowsetChange

IRowsetIdentity

DBPROP_IRowsetIdentity

IRowsetIndex

DBPROP_IRowsetIndex

IRowsetInfo

DBPROP_IRowsetInfo

IRowsetLocate

DBPROP_IRowsestLocate

IRowsetResynch

 

IRowsetScroll

DBPROP_IRowsetScroll

IRowsetUpdate

DBPROP_IRowsetUpdate

ISequentialStream

DBPROP_ISequentialStream

IStorage

DBPROP_IStorage

IStream

DBPROP_IStream

ISupportErrorInfo

DBPROP_ISupportErrorInfo

Literal Bookmarks

DBPROP_LITERALBOOKMARKS

Literal Row Identity

DBPROP_LITERALIDENTITY

Maximum Open Rows

DBPROP_MAXOPENROWS

Maximum Pending Rows

DBPROP_MAXPENDINGROWS

Maximum Rows

DBPROP_MAXROWS

Memory Usage

DBPROP_MEMORYUSAGE

Notification Granularity

DBPROP_NOTIFICATIONGRANULARITY

Notification Phases

DBPROP_NOTIFICATIONPHASES

Objects Transacted

DBPROP_TRANSACTEDOBJECT

Others' Changes Visible

DBPROP_OTHERUPDATEDELETE

Others' Inserts Visible

DBPROP_OTHERINSERT

Own Changes Visible

DBPROP_OWNUPDATEDELETE

Own Inserts Visible

DBPROP_OWNINSERT

Preserve on Abort

DBPROP_ABORTPRESERVE

Preserve on Commit

DBPROP_COMMITPRESERVE

Quick Restart

DBPROP_QUICKRESTART

Reentrant Events

DBPROP_REENTRANTEVENTS

Remove Deleted Rows

DBPROP_REMOVEDELETED

Report Multiple Changes

DBPROP_REPORTMULTIPLECHANGES

Return Pending Inserts

DBPROP_RETURNPENDINGINSERTS

Row Delete Notification

DBPROP_NOTIFYROWDELETE

Row First Change Notification

DBPROP_NOTIFYROWFIRSTCHANGE

Row Insert Notification

DBPROP_NOTIFYROWINSERT

Row Privileges

DBPROP_ROWRESTRICT

Row Resynchronization Notification

DBPROP_NOTIFYROWRESYNCH

Row Threading Model

DBPROP_ROWTHREADMODEL

Row Undo Change Notification

DBPROP_NOTIFYROWUNDOCHANGE

Row Undo Delete Notification

DBPROP_NOTIFYROWUNDODELETE

Row Undo Insert Notification

DBPROP_NOTIFYROWUNDOINSERT

Row Update Notification

DBPROP_NOTIFYROWUPDATE

Rowset Fetch Position Change Notification

DBPROP_NOTIFYROWSETFETCHPOSISIONCHANGE

Rowset Release Notification

DBPROP_NOTIFYROWSETRELEASE

Scroll Backwards

DBPROP_CANSCROLLBACKWARDS

Skip Deleted Bookmarks

DBPROP_BOOKMARKSKIPPED

Strong Row Identity

DBPROP_STRONGITDENTITY

Updatability

DBPROP_UPDATABILITY

Use Bookmarks

DBPROP_BOOKMARKS

The following properties are added to the Properties collection of the Command object.

ADO Property Name

OLE DB Property Name

Access Order

DBPROP_ACCESSORDER

Append-Only Rowset

DBPROP_APPENDONLY

Blocking Storage Objects

DBPROP_BLOCKINGSTORAGEOBJECTS

Bookmark Type

DBPROP_BOOKMARKTYPE

Bookmarkable

DBPROP_IROWSETLOCATE

Change Inserted Rows

DBPROP_CHANGEINSERTEDROWS

Column Privileges

DBPROP_COLUMNRESTRICT

Column Set Notification

DBPROP_NOTIFYCOLUMNSET

Defer Column

DBPROP_DEFERRED

Delay Storage Object Updates

DBPROP_DELAYSTORAGEOBJECTS

Fetch Backwards

DBPROP_CANFETCHBACKWARDS

Hold Rows

DBPROP_CANHOLDROWS

IAccessor

DBPROP_IAccessor

IColumnsInfo

DBPROP_IColumnsInfo

IColumnsRowset

DBPROP_IColumnsRowset

IConnectionPointContainer

DBPROP_IConnectionPointContainer

IConvertType

DBPROP_IConvertType

ILockBytes

DBPROP_ILockBytes

Immobile Rows

DBPROP_IMMOBILEROWS

IRowset

DBPROP_IRowset

IRowsetChange

DBPROP_IRowsetChange

IRowsetIdentity

DBPROP_IRowsetIdentity

IRowsetIndex

DBPROP_IRowsetIndex

IRowsetInfo

DBPROP_IRowsetInfo

IRowsetLocate

DBPROP_IRowsetLocate

IRowsetResynch

 

IRowsetScroll

DBPROP_IRowsetScroll

IRowsetUpdate

DBPROP_IRowsetUpdate

ISequentialStream

DBPROP_ISequentialStream

IStorage

DBPROP_IStorage

IStream

DBPROP_IStream

ISupportErrorInfo

DBPROP_ISupportErrorInfo

Literal Bookmarks

DBPROP_LITERALBOOKMARKS

Literal Row Identity

DBPROP_LITERALIDENTITY

Lock Mode

DBPROP_LOCKMODE

Maximum Open Rows

DBPROP_MAXOPENROWS

Maximum Pending Rows

DBPROP_MAXPENDINGROWS

Maximum Rows

DBPROP_MAXROWS

Notification Granularity

DBPROP_NOTIFICATIONGRANULARITY

Notification Phases

DBPROP_NOTIFICATIONPHASES

Objects Transacted

DBPROP_TRANSACTEDOBJECT

Others' Changes Visible

DBPROP_OTHERUPDATEDELETE

Others' Inserts Visible

DBPROP_OTHERINSERT

Own Changes Visible

DBPROP_OWNUPDATEDELETE

Own Inserts Visible

DBPROP_OWNINSERT

Preserve on Abort

DBPROP_ABORTPRESERVE

Preserve on Commit

DBPROP_COMMITPRESERVE

Quick Restart

DBPROP_QUICKRESTART

Reentrant Events

DBPROP_REENTRANTEVENTS

Remove Deleted Rows

DBPROP_REMOVEDELETED

Report Multiple Changes

DBPROP_REPORTMULTIPLECHANGES

Return Pending Inserts

DBPROP_RETURNPENDINGINSERTS

Row Delete Notification

DBPROP_NOTIFYROWDELETE

Row First Change Notification

DBPROP_NOTIFYROWFIRSTCHANGE

Row Insert Notification

DBPROP_NOTIFYROWINSERT

Row Privileges

DBPROP_ROWRESTRICT

Row Resynchronization Notification

DBPROP_NOTIFYROWRESYNCH

Row Threading Model

DBPROP_ROWTHREADMODEL

Row Undo Change Notification

DBPROP_NOTIFYROWUNDOCHANGE

Row Undo Delete Notification

DBPROP_NOTIFYROWUNDODELETE

Row Undo Insert Notification

DBPROP_NOTIFYROWUNDOINSERT

Row Update Notification

DBPROP_NOTIFYROWUPDATE

Rowset Fetch Position Change Notification

DBPROP_NOTIFYROWSETFETCHPOSITIONCHANGE

Rowset Release Notification

DBPROP_NOTIFYROWSETRELEASE

Scroll Backwards

DBPROP_CANSCROLLBACKWARDS

Server Data on Insert

DBPROP_SERVERDATAONINSERT

Skip Deleted Bookmarks

DBPROP_BOOKMARKSKIP

Strong Row Identity

DBPROP_STRONGIDENTITY

Updatability

DBPROP_UPDATABILITY

Use Bookmarks

DBPROP_BOOKMARKS

For specific implementation details and functional information about the OLE DB Provider for Microsoft Jet, see Jet Provider in the OLE DB documentation.

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