JetOpenDatabase Function

Article
08/26/2021

Applies to: Windows | Windows Server

JetOpenDatabase Function

The JetOpenDatabase function opens a previously attached database, using the JetAttachDatabase or JetAttachDatabase2 functions, for use with a database session. This function can be called multiple times for the same database.

    JET_ERR JET_API JetOpenDatabase(
      __in          JET_SESID sesid,
      __in          const tchar* szFilename,
      __in_opt      const tchar* szConnect,
      __out         JET_DBID* pdbid,
      __in          JET_GRBIT grbit
    );

Parameters

sesid

The database session context to use for the API call.

szFilename

The name of the database to open.

szConnect

Reserved. Set to NULL.

pdbid

Pointer to a buffer that, on a successful call, contains the identifier of the database. If the call fails, the value is undefined.

grbit

A group of bits that specify zero or more of the following options.

Value	Meaning
JET_bitDbExclusive	Allows only a single session to attach a database. Normally, several sessions can open a database.
JET_bitDbReadOnly	Prevents modifications to the database.

Return Value

This function returns the JET_ERR datatype with one of the following return codes. For more information about the possible ESE errors, see Extensible Storage Engine Errors and Error Handling Parameters.

Return code	Description
JET_errSuccess	The operation completed successfully.
JET_errDatabaseInUse	Exclusive access was requested, but could not be granted.
JET_errDatabaseInvalidPath	An invalid path was given in szFilename. szFilename must be non-NULL and refer to a valid file.
JET_errDatabaseLocked	Another session has already opened the database exclusively (using JET_bitDbExclusive).
JET_errDatabaseNotFound	The database was not previously attached (See JetAttachDatabase).
JET_errInvalidDatabase	An attempt was made to open a file that is not a valid database file.
JET_errOneDatabasePerSession	An attempt was made to open more than one database, and JET_paramOneDatabasePerSession was set. For more information, see System Parameters.
JET_wrnFileOpenReadOnly	The file was attached as read-only, but JetOpenDatabase did not pass JET_bitDbReadOnly. The database is still opened with read-only access.

Requirements

Requirement	Value
Client	Requires Windows Vista, Windows XP, or Windows 2000 Professional.
Server	Requires Windows Server 2008, Windows Server 2003, or Windows 2000 Server.
Header	Declared in Esent.h.
Library	Use ESENT.lib.
DLL	Requires ESENT.dll.
Unicode	Implemented as JetOpenDatabaseW (Unicode) and JetOpenDatabaseA (ANSI).

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JetOpenDatabase Function