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Oracle® Database Reference
11g Release 2 (11.2)

E40402-10
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V$DATABASE

V$DATABASE displays information about the database from the control file.

Column Datatype Description
DBID NUMBER Database identifier calculated when the database is created and stored in all file headers
NAME VARCHAR2(9) Name of the database
CREATED DATE Creation date of the database. If the control file was re-created using the CREATE CONTROLFILE statement, then this column displays the date that the control file was re-created.
RESETLOGS_CHANGE# NUMBER System change number (SCN) at open resetlogs
RESETLOGS_TIME DATE Timestamp of open resetlogs
PRIOR_RESETLOGS_CHANGE# NUMBER SCN at prior resetlogs
PRIOR_RESETLOGS_TIME DATE Timestamp of prior resetlogs
LOG_MODE VARCHAR2(12) Archive log mode:
  • NOARCHIVELOG

  • ARCHIVELOG

  • MANUAL

CHECKPOINT_CHANGE# NUMBER Last SCN checkpointed
ARCHIVE_CHANGE# NUMBER Database force archiving SCN. Any redo log with a start SCN below this will be forced to archive out.
CONTROLFILE_TYPE VARCHAR2(7) Type of control file:
  • STANDBY - Indicates that the database is in standby mode

  • CLONE - Indicates a clone database

  • BACKUP | CREATED - Indicates the database is being recovered using a backup or created control file

  • CURRENT - database is available for general use

CONTROLFILE_CREATED DATE Creation date of the control file
CONTROLFILE_SEQUENCE# NUMBER Control file sequence number incremented by control file transactions
CONTROLFILE_CHANGE# NUMBER Last SCN in backup control file; null if the control file is not a backup
CONTROLFILE_TIME DATE Last timestamp in backup control file; null if the control file is not a backup
OPEN_RESETLOGS VARCHAR2(11) (NOT ALLOWED | ALLOWED | REQUIRED) Indicates whether the next database open allows or requires the resetlogs option
VERSION_TIME DATE Version time
OPEN_MODE VARCHAR2(20) Open mode information:
  • MOUNTED

  • READ WRITE

  • READ ONLY

  • READ ONLY WITH APPLY - A physical standby database is open in real-time query mode

PROTECTION_MODE VARCHAR2(20) Protection mode currently in effect for the database:
  • MAXIMUM PROTECTION - Database is running in maximized protection mode

  • MAXIMUM AVAILABILITY - Database is running in maximized availability mode

  • RESYNCHRONIZATION - Database is running in resynchronization mode

  • MAXIMUM PERFORMANCE - Database is running in maximized performance mode

  • UNPROTECTED - Database is unprotected (this normally occurs when the primary database is mounted and not open)

PROTECTION_LEVEL VARCHAR2(20) Aggregated protection mode currently in effect for the database:
  • MAXIMUM PROTECTION - Database is running in maximized protection mode

  • MAXIMUM AVAILABILITY - Database is running in maximized availability mode

  • RESYNCHRONIZATION - Database is running in resynchronization mode

  • MAXIMUM PERFORMANCE - Database is running in maximized performance mode

  • UNPROTECTED - Database is unprotected (this normally occurs when the primary database is mounted and not open)

Note: This column is an aggregation of the PROTECTION_MODE of all standby archive log destinations.

REMOTE_ARCHIVE VARCHAR2(8) Value of the REMOTE_ARCHIVE_ENABLE initialization parameter
ACTIVATION# NUMBER Number assigned to the database instantiation
SWITCHOVER# NUMBER Number assigned to the database switchover
DATABASE_ROLE VARCHAR2(16) Current role of the database:
  • SNAPSHOT STANDBY

  • LOGICAL STANDBY

  • PHYSICAL STANDBY

  • PRIMARY

ARCHIVELOG_CHANGE# NUMBER Highest NEXT_CHANGE# (from the V$ARCHIVED_LOG view) for an archive log
ARCHIVELOG_COMPRESSION VARCHAR2(8) Status of the archive log compression (ENABLED) or (DISABLED)
SWITCHOVER_STATUS VARCHAR2(20) Indicates whether switchover is allowed:
  • NOT ALLOWED - On a primary database, this status indicates that there are no valid and enabled standby databases. On a standby database, this status indicates that a switchover request has not been received from the primary database.

  • SESSIONS ACTIVE - The database has active sessions. On a physical standby database, the WITH SESSION SHUTDOWN SQL clause must be specified to perform a role transition while in this state. On a logical standby database, a role transition can be performed while in this state, but the role transition will not complete until all current transactions have committed.

  • SWITCHOVER PENDING - On a physical standby database, this status indicates that a switchover request has been received from the primary database and is being processed. A physical standby database cannot switch to the primary role while in this transient state.

  • SWITCHOVER LATENT - On a physical standby database, this status indicates that a switchover request was pending, but the original primary database has been switched back to the primary role.

  • TO PRIMARY - The database is ready to switch to the primary role.

  • TO STANDBY - The database is ready to switch to either the physical or logical standby role.

  • TO LOGICAL STANDBY - The database has received a data dictionary from a logical standby database and is ready to switch to the logical standby role.

  • RECOVERY NEEDED - On a physical standby database, this status indicates that additional redo must be applied before the database can switch to the primary role.

  • PREPARING SWITCHOVER - On a primary database, this status indicates that a data dictionary is being received from a logical standby database in preparation for switching to the logical standby role. On a logical standby database, this status indicates that the data dictionary has been sent to the primary database and other standby databases.

  • PREPARING DICTIONARY - On a logical standby database, this status indicates that the data dictionary is being sent to the primary database and other standby databases in preparation for switching to the primary role.

  • FAILED DESTINATION - On a primary database, this status indicates that one or more standby destinations are in an error state.

  • RESOLVABLE GAP - On a primary database, this status indicates that one or more standby databases have a redo gap that can be automatically resolved by fetching the missing redo from the primary database or from another standby database.

  • UNRESOLVABLE GAP - On a primary database, this status indicates that one or more standby databases have a redo gap that cannot be automatically resolved by fetching the missing redo from the primary database or from another standby database.

  • LOG SWITCH GAP - On a primary database, this status indicates that one or more standby databases are missing redo due to a recent log switch.

DATAGUARD_BROKER VARCHAR2(8) Data Guard broker information:
  • ENABLED - Database is part of a broker configuration and broker management of the database is enabled

  • DISABLED - Database is part of a broker configuration and broker management of the database is disabled. This value is displayed if the user disabled broker management of the database or configuration, or if broker management was disabled due to a role change (for example, the old primary was disabled after a failover operation).

    the database is not part of a broker configuration.

    the broker is not running on the database.

GUARD_STATUS VARCHAR2(7) Protects data from being changed:
  • ALL - Indicates all users other than SYS are prevented from making changes to any data in the database.

  • STANDBY - Indicates all users other than SYS are prevented from making changes to any database object being maintained by logical standby.

  • NONE - Indicates normal security for all data in the database.

SUPPLEMENTAL_LOG_DATA_MIN VARCHAR2(8) Ensures that LogMiner (and any products building on LogMiner technology) will have sufficient information to support chained rows and various storage arrangements such as cluster tables:
  • NO - None of the database-wide supplemental logging directives are enabled

  • IMPLICIT - Minimal supplemental logging is enabled because all or a combination of primary key, unique key, and foreign key supplemental logging is enabled

  • YES - Minimal supplemental logging is enabled through an ALTER DATABASE ADD SUPPLEMENTAL LOG DATA statement

See Also: Oracle Database SQL Language Reference for additional information about the ALTER DATABASE ADD SUPPLEMENTAL LOG DATA statement

SUPPLEMENTAL_LOG_DATA_PK VARCHAR2(3) For all tables with a primary key, indicates whether all columns of the primary key are placed into the redo log whenever an update is performed (YES) or not (NO)

See Also: Oracle Database SQL Language Reference for more information about the ALTER DATABASE ADD SUPPLEMENTAL LOG supplemental_id_key_clause statement

SUPPLEMENTAL_LOG_DATA_UI VARCHAR2(3) For all tables with a unique key, indicates whether all other columns belonging to the unique key are placed into the redo log if any of the unique key columns are modified (YES) or not (NO)

See Also: Oracle Database SQL Language Reference for more information about the ALTER DATABASE ADD SUPPLEMENTAL LOG supplemental_id_key_clause statement

FORCE_LOGGING VARCHAR2(3) Indicates whether the database is under force logging mode (YES) or not (NO)
PLATFORM_ID NUMBER Platform identification number of the database
PLATFORM_NAME VARCHAR2(101) Platform name of the database
RECOVERY_TARGET_INCARNATION# NUMBER Incarnation number where all datafiles are recovered by the RECOVER DATABASE command
LAST_OPEN_INCARNATION# NUMBER Record number of the incarnation in V$DATABASE_INCARNATION that was last opened successfully
CURRENT_SCN NUMBER Current SCN; null if the database is not currently open. For a standby database, it is the checkpoint SCN of the mounted physical standby database during media recovery and is always less than the last applied SCN tracked in V$RECOVERY_PROGRESS.
FLASHBACK_ON VARCHAR2(18) Possible values are as follows:
  • YES - Flashback is on

  • NO - Flashback is off

  • RESTORE POINT ONLY - Flashback is on but one can only flashback to guaranteed restore points

SUPPLEMENTAL_LOG_DATA_FK VARCHAR2(3) For all tables with a foreign key, indicates whether all other columns belonging to the foreign key are placed into the redo log if any foreign key columns are modified (YES) or not (NO)

See Also: Oracle Database SQL Language Reference for more information about the ALTER DATABASE ADD SUPPLEMENTAL LOG supplemental_id_key_clause statement

SUPPLEMENTAL_LOG_DATA_ALL VARCHAR2(3) For all columns, indicates whether all the fixed-length maximum size columns of that row are placed into the redo log (YES) or not (NO)

See Also: Oracle Database SQL Language Reference for more information about the ALTER DATABASE ADD SUPPLEMENTAL LOG supplemental_id_key_clause statement

DB_UNIQUE_NAME VARCHAR2(30) Unique database name
STANDBY_BECAME_PRIMARY_SCN NUMBER SCN at which a physical standby database became a primary database. This SCN is useful for converting a failed primary database into a physical standby database after a forced failover.

See Also: Oracle Data Guard Concepts and Administration

FS_FAILOVER_STATUS VARCHAR2(22) Fast-start failover status:
  • DISABLED

  • BYSTANDER

  • SYNCHRONIZED

  • UNSYNCHRONIZED

  • SUSPENDED

  • STALLED

  • LOADING DICTIONARY

  • PRIMARY UNOBSERVED

  • REINSTATE REQUIRED

  • REINSTATE FAILED

  • TARGET OVER LAG LIMIT

  • TARGET UNDER LAG LIMIT

See Also: Oracle Data Guard Broker for detailed descriptions of these values

Note: If the value of this column is DISABLED, then the values for the FS_FAILOVER_CURRENT_TARGET, FS_FAILOVER_THRESHOLD, FS_FAILOVER_OBSERVER_PRESENT, and FS_FAILOVER_OBSERVER_HOST columns in this table are not meaningful.

FS_FAILOVER_CURRENT_TARGET VARCHAR2(30) DB_UNIQUE_NAME of the standby that is the current FSFO target standby for the Data Guard configuration
FS_FAILOVER_THRESHOLD NUMBER Time (in seconds) that the observer will attempt to reconnect with a disconnected primary before attempting FSFO with the target standby
FS_FAILOVER_OBSERVER_PRESENT VARCHAR2(7) Indicates whether the observer is currently connected to the local database (YES) or not (NO)

Note: This column is consistent throughout an Oracle RAC environment; that is, if the observer is connected to any instance, then all instances will show a value of YES.

FS_FAILOVER_OBSERVER_HOST VARCHAR2(512) Machine name that is currently hosting the observer process
CONTROLFILE_CONVERTED VARCHAR2(3) Indicates whether the control file was implicitly converted from its original type during restore (YES) or not (NO)

This column will be set to YES when RMAN restores a standby control file from a backup of the control file taken at the primary database or restores a backup control file from a backup taken at the physical standby database.

This column will change to NO when the file names are fixed using information in the recovery catalog schema.

PRIMARY_DB_UNIQUE_NAME VARCHAR2(30) For any Standby database (Physical, Logical, or Snapshot), this column will contain the DB_UNIQUE_NAME of the Primary database that this Standby last received current redo from.

If this standby has not received any current redo since last being started, then this column will be null.

For a Primary database that had previously been a Standby, this column will contain the DB_UNIQUE_NAME of the last Primary that this database received current redo from while acting as a Standby.

For a Primary database that has never been a Standby, this column will be null.

SUPPLEMENTAL_LOG_DATA_PL VARCHAR2(3) Indicates whether additional information is logged in the redo log (YES) or not (NO) during invocation of procedures in Oracle-supplied packages for which procedural replication is supported.

See Also: Oracle Data Guard Concepts and Administration for a list of Oracle-supplied packages that are procedurally replicated to a logical standby database

MIN_REQUIRED_CAPTURE_CHANGE# NUMBER Minimum REQUIRED_CHECKPOINT_SCN for all local capture processes on the database