Describes how databases can be created and opened using the database name.
In order to support the DBMS client-server interface, the RDbNamedDatabase class provides the interface for creating and opening databases identified by name.
The mechanism is generic; the database is identified by its name and the database format. The format is a name that is used to identify the implementation used for creating or opening that database. There is a default format, which has the name "epoc". The default format is a store database in the root stream of the database file.
If required, other formats can be provided in extension DBMS driver libraries. These formats need no be file-based. Additional DBMS driver libraries are dynamically bound to the API at run-time, if one can be found to support the format requested.
Formats which are UidTyped files, such as the default, can allow the client to specify a 3rd Uid by extending the format name with the Uid name (as generated by the Name() member function of TUid , an 8 digit hexadecimal number enclosed in square brackets).
If specified, this is also checked when a database is opened. e.g. creating a FileStore database “C:\My Database” with a 3rd Uid of 0x10001234:
_LIT(KMydatabase,"C:\\My Database"); _LIT(KDemoUid,""); RDbNamedDatabase database; TInt r=database.Create(fs,KMydatabase,KDemoUid);
For comparison, the equivalent code required to create an RDbStoreDatabase in the root of a CPermanentFileStore would have been:
_LIT(KMydatabase,"C:\\My Database"); CFileStore* fstore=CPermanentFileStore::ReplaceLC(fs,KMydatabase,EFileWrite); fstore->SetTypeL(TUidType(fstore->Layout(),KDatabaseUid,TUid::Uid(0x10001234))); RDbStoreDatabase database; fstore->SetRootL(database.CreateL(fstore)); fstore->CommitL();
A named database may be encrypted; the default is an un-encrypted database.
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