V$DATAFILE

V$DATAFILE displays datafile information from the control file.

See Also:

"V$DATAFILE_HEADER", which displays information from datafile headers

Column	Datatype	Description
`FILE#`	`NUMBER`	File identification number
`CREATION_CHANGE#`	`NUMBER`	Change number at which the datafile was created
`CREATION_TIME`	`DATE`	Timestamp of the datafile creation
`TS#`	`NUMBER`	Tablespace number
`RFILE#`	`NUMBER`	Tablespace relative datafile number
`STATUS`	`VARCHAR2(7)`	Type of file (system or user) and its status. Values: `OFFLINE`, `ONLINE`, `SYSTEM`, `RECOVER`, `SYSOFF` (an offline file from the `SYSTEM` tablespace)
`ENABLED`	`VARCHAR2(10)`	Describes how accessible the file is from SQL: `DISABLED` - No SQL access allowed `READ ONLY` - No SQL updates allowed `READ WRITE` - Full access allowed `UNKNOWN` - should not occur unless the control file is corrupted
`CHECKPOINT_CHANGE#`	`NUMBER`	SCN at last checkpoint
`CHECKPOINT_TIME`	`DATE`	Timestamp of the checkpoint#
`UNRECOVERABLE_CHANGE#`	`NUMBER`	Last unrecoverable change number made to this datafile. If the database is in `ARCHIVELOG` mode, then this column is updated when an unrecoverable operation completes. If the database is not in `ARCHIVELOG` mode, this column does not get updated.
`UNRECOVERABLE_TIME`	`DATE`	Timestamp of the last unrecoverable change. This column is updated only if the database is in `ARCHIVELOG` mode.
`LAST_CHANGE#`	`NUMBER`	Last change number made to this datafile (null if the datafile is being changed)
`LAST_TIME`	`DATE`	Timestamp of the last change
`OFFLINE_CHANGE#`	`NUMBER`	Offline change number of the last offline range. This column is updated only when the datafile is brought online.
`ONLINE_CHANGE#`	`NUMBER`	Online change number of the last offline range
`ONLINE_TIME`	`DATE`	Online timestamp of the last offline range
`BYTES`	`NUMBER`	Current datafile size (in bytes); `0` if inaccessible
`BLOCKS`	`NUMBER`	Current datafile size (in blocks); 0 if inaccessible
`CREATE_BYTES`	`NUMBER`	Size when created (in bytes)
`BLOCK_SIZE`	`NUMBER`	Block size of the datafile
`NAME`	`VARCHAR2(513)`	Name of the datafile
`PLUGGED_IN`	`NUMBER`	Describes whether the tablespace is plugged in. The value is `1` if the tablespace is plugged in and has not been made read/write, `0` if not.
`BLOCK1_OFFSET`	`NUMBER`	Offset from the beginning of the file to where the Oracle generic information begins. The exact length of the file can be computed as follows: `BYTES + BLOCK1_OFFSET`.
`AUX_NAME`	`VARCHAR2(513)`	Auxiliary name that has been set for this file via `CONFIGURE AUXNAME`
`FIRST_NONLOGGED_SCN`	`NUMBER`	First nonlogged SCN
`FIRST_NONLOGGED_TIME`	`DATE`	First nonlogged time
`FOREIGN_DBID`	`NUMBER`	Foreign DBID from which this data file came from. The value is 0 if this file is not a foreign database file.
`FOREIGN_CREATION_CHANGE#`	`NUMBER`	Creation SCN of a foreign datafile. The value is 0 if this file is not a foreign database file.
`FOREIGN_CREATION_TIME`	`DATE`	Creation time of a foreign datafile. The value is 0 if this file is not a foreign database file.
`PLUGGED_READONLY`	`VARCHAR2(3)`	`YES` if this is a transported read-only foreign file; otherwise `NO`.
`PLUGIN_CHANGE#`	`NUMBER`	SCN at which the foreign datafile was transported into the database. The value is 0 if this file is not a foreign database file.
`PLUGIN_RESETLOGS_CHANGE#`	`NUMBER`	The SCN of the `RESETLOGS` operation for the incarnation into which this foreign file was transported. The value is 0 if this file is not a foreign database file.
`PLUGIN_RESETLOGS_TIME`	`DATE`	The time of the `RESETLOGS` operation for the incarnation into which this foreign file was transported. The value is 0 if this file is not a foreign database file.