public void dbremove(DbTxn txnid, String file, String database, int flags)
throws DbException, FileNotFoundException;
The DbEnv.dbremove method removes the database specified by the
file and database arguments. If no database is
specified, the underlying file represented by file is removed,
incidentally removing all databases that it contained.
Applications should never remove databases with open Db handles,
or in the case of removing a file, when any database in the file has an
open handle. For example, some architectures do not permit the removal
of files with open system handles. On these architectures, attempts to
remove databases currently in use by any thread of control in the system
If the operation is to be transaction-protected, the txnid
parameter is a transaction handle returned from DbEnv.txn_begin;
The flags value must be set to 0 or
the following value:
- Enclose the DbEnv.dbremove call within a transaction. If the call succeeds,
changes made by the operation will be recoverable. If the call fails,
the operation will have made no changes.
The DbEnv.dbremove method throws an exception that encapsulates a non-zero error value on
environment variable DB_HOME may be used as the path of the
database environment home.
DbEnv.dbremove is affected by any database directory specified using the
DbEnv.set_data_dir method, or by setting the "set_data_dir" string
in the environment's DB_CONFIG file.
The DbEnv.dbremove method may fail and throw an exception encapsulating a non-zero error for the following conditions:
- An invalid flag value or parameter was specified.
A database in the file is currently open.
Called before DbEnv.open was called.
If the file or directory does not exist, the DbEnv.dbremove method will
throw a FileNotFoundException exception.
The DbEnv.dbremove method may fail and throw an exception for errors specified for other Berkeley DB and C library or system methods.
If a catastrophic error has occurred, the DbEnv.dbremove method may fail and
throw a DbRunRecoveryException,
in which case all subsequent Berkeley DB calls will fail in the same way.
Database Environments and Related Methods
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