Skip Headers

Oracle® Database Reference 10g Release 2 (10.2) Part Number B14237-02 |
Home | Book List | Contents | Index | Master Index | Feedback

Previous | Next
| View PDF

# V$SESSION

This view lists session information for each current session.

Column | Datatype | Description
--- | --- | ---
`SADDR` | `RAW(4 | 8)` | Session address
`SID` | `NUMBER` | Session identifier
`SERIAL#` | `NUMBER` | Session serial number. Used to uniquely identify a session's objects. Guarantees that session-level commands are applied to the correct session objects if the session ends and another session begins with the same session ID.
`AUDSID` | `NUMBER` | Auditing session ID
`PADDR` | `RAW(4 | 8)` | Address of the process that owns the session
`USER#` | `NUMBER` | Oracle user identifier
`USERNAME` | `VARCHAR2(30)` | Oracle username
`COMMAND` | `NUMBER` | Command in progress (last statement parsed); for a list of values, see Table 7-5. These values also appear in the `AUDIT_ACTIONS` table.
`OWNERID` | `NUMBER` | The column contents are invalid if the value is `2147483644`. Otherwise, this column contains the identifier of the user who owns the migratable session. For operations using Parallel Slaves, interpret this value as a 4-byte value. The low-order 2 bytes of which represent the session number, and the high-order bytes the instance ID of the query coordinator.
`TADDR` | `VARCHAR2(8)` | Address of transaction state object
`LOCKWAIT` | `VARCHAR2(8)` | Address of lock waiting for; null if none
`STATUS` | `VARCHAR2(8)` | Status of the session: `ACTIVE` - Session currently executing SQL `INACTIVE` `KILLED` - Session marked to be killed `CACHED` - Session temporarily cached for use by Oracle*XA `SNIPED` - Session inactive, waiting on the client
`SERVER` | `VARCHAR2(9)` | Server type (`DEDICATED`| `SHARED`| `PSEUDO`| `NONE`)
`SCHEMA#` | `NUMBER` | Schema user identifier
`SCHEMANAME` | `VARCHAR2(30)` | Schema user name
`OSUSER` | `VARCHAR2(30)` | Operating system client user name
`PROCESS` | `VARCHAR2(12)` | Operating system client process ID
`MACHINE` | `VARCHAR2(64)` | Operating system machine name
`TERMINAL` | `VARCHAR2(30)` | Operating system terminal name
`PROGRAM` | `VARCHAR2(48)` | Operating system program name
`TYPE` | `VARCHAR2(10)` | Session type
`SQL_ADDRESS` | `RAW(4 | 8)` | Used with `SQL_HASH_VALUE` to identify the SQL statement that is currently being executed
`SQL_HASH_VALUE` | `NUMBER` | Used with `SQL_ADDRESS` to identify the SQL statement that is currently being executed
`SQL_ID` | `VARCHAR2(13)` | SQL identifier of the SQL statement that is currently being executed
`SQL_CHILD_NUMBER` | `NUMBER` | Child number of the SQL statement that is currently being executed
`PREV_SQL_ADDR` | `RAW(4 | 8)` | Used with `PREV_HASH_VALUE` to identify the last SQL statement executed
`PREV_HASH_VALUE` | `NUMBER` | Used with `SQL_HASH_VALUE` to identify the last SQL statement executed
`PREV_SQL_ID` | `VARCHAR2(13)` | SQL identifier of the last SQL statement executed
`PREV_CHILD_NUMBER` | `NUMBER` | Child number of the last SQL statement executed
`MODULE` | `VARCHAR2(48)` | Name of the currently executing module as set by calling the `DBMS_APPLICATION_INFO.SET_MODULE` procedure
`MODULE_HASH` | `NUMBER` | Hash value of the above `MODULE`
`ACTION` | `VARCHAR2(32)` | Name of the currently executing action as set by calling the `DBMS_APPLICATION_INFO.SET_ACTION` procedure
`ACTION_HASH` | `NUMBER` | Hash value of the above action name
`CLIENT_INFO` | `VARCHAR2(64)` | Information set by the `DBMS_APPLICATION_INFO.SET_CLIENT_INFO` procedure
`FIXED_TABLE_SEQUENCE` | `NUMBER` | This contains a number that increases every time the session completes a call to the database and there has been an intervening select from a dynamic performance table. This column can be used by performance monitors to monitor statistics in the database. Each time the performance monitor looks at the database, it only needs to look at sessions that are currently active or have a higher value in this column than the highest value that the performance monitor saw the last time. All the other sessions have been idle since the last time the performance monitor looked at the database.
`ROW_WAIT_OBJ#` | `NUMBER` | Object ID for the table containing the row specified in `ROW_WAIT_ROW#`
`ROW_WAIT_FILE#` | `NUMBER` | Identifier for the datafile containing the row specified in `ROW_WAIT_ROW#`. This column is valid only if the session is currently waiting for another transaction to commit and the value of `ROW_WAIT_OBJ#` is not `-1`.
`ROW_WAIT_BLOCK#` | `NUMBER` | Identifier for the block containing the row specified in `ROW_WAIT_ROW#`. This column is valid only if the session is currently waiting for another transaction to commit and the value of `ROW_WAIT_OBJ#` is not `-1`.
`ROW_WAIT_ROW#` | `NUMBER` | Current row being locked. This column is valid only if the session is currently waiting for another transaction to commit and the value of `ROW_WAIT_OBJ#` is not `-1`.
`LOGON_TIME` | `DATE` | Time of logon
`LAST_CALL_ET` | `NUMBER` | If the session `STATUS` is currently `ACTIVE`, then the value represents the elapsed time in seconds since the session has become active. If the session `STATUS` is currently `INACTIVE`, then the value represents the elapsed time in seconds since the session has become inactive.
`PDML_ENABLED` | `VARCHAR2(3)` | This column has been replaced by column `PDML_STATUS`
`FAILOVER_TYPE` | `VARCHAR2(13)` | Indicates whether and to what extent transparent application failover (TAF) is enabled for the session: `NONE` - Failover is disabled for this session `SESSION` - Client is able to fail over its session following a disconnect `SELECT` - Client is able to fail over queries in progress as well See Also: Oracle Database Concepts for more information on TAF Oracle Database Net Services Administrator's Guide for information on configuring TAF
`FAILOVER_METHOD` | `VARCHAR2(10)` | Indicates the transparent application failover method for the session: `NONE` - Failover is disabled for this session `BASIC` - Client itself reconnects following a disconnect `PRECONNECT` - Backup instance can support all connections from every instance for which it is backed up
`FAILED_OVER` | `VARCHAR2(3)` | Indicates whether the session is running in failover mode and failover has occurred (`YES`) or not (`NO`)
`RESOURCE_CONSUMER_GROUP` | `VARCHAR2(32)` | Name of the session's current resource consumer group
`PDML_STATUS` | `VARCHAR2(8)` | If `ENABLED`, the session is in a PARALLEL DML enabled mode. If `DISABLED`, PARALLEL DML enabled mode is not supported for the session. If `FORCED`, the session has been altered to force PARALLEL DML.
`PDDL_STATUS` | `VARCHAR2(8)` | If `ENABLED`, the session is in a PARALLEL DDL enabled mode. If `DISABLED`, PARALLEL DDL enabled mode is not supported for the session. If `FORCED`, the session has been altered to force PARALLEL DDL.
`PQ_STATUS` | `VARCHAR2(8)` | If `ENABLED`, the session is in a PARALLEL QUERY enabled mode. If `DISABLED`, PARALLEL QUERY enabled mode is not supported for the session. If `FORCED`, the session has been altered to force PARALLEL QUERY.
`CURRENT_QUEUE_DURATION` | `NUMBER` | If queued (`1`), the current amount of time the session has been queued. If not currently queued, the value is `0`.
`CLIENT_IDENTIFIER` | `VARCHAR2(64)` | Client identifier of the session
`BLOCKING_SESSION_STATUS` | `VARCHAR2(11)` | Blocking session status: `VALID` `NO HOLDER` `GLOBAL` `NOT IN WAIT` `UNKNOWN`
`BLOCKING_INSTANCE` | `NUMBER` | Instance identifier of blocking session
`BLOCKING_SESSION` | `NUMBER` | Session identifier of blocking session
`SEQ#` | `NUMBER` | Sequence number that uniquely identifies the wait. Incremented for each wait.
`EVENT#` | `NUMBER` | Event number
`EVENT` | `VARCHAR2(64)` | Resource or event for which the session is waiting See Also: Appendix C, "Oracle Wait Events"
`P1TEXT` | `VARCHAR2(64)` | Description of the first additional parameter
`P1` | `NUMBER` | First additional parameter
`P1RAW` | `RAW(4)` | First additional parameter
`P2TEXT` | `VARCHAR2(64)` | Description of the second additional parameter
`P2` | `NUMBER` | Second additional parameter
`P2RAW` | `RAW(4)` | Second additional parameter
`P3TEXT` | `VARCHAR2(64)` | Description of the third additional parameter
`P3` | `NUMBER` | Third additional parameter
`P3RAW` | `RAW(4)` | Third additional parameter
`WAIT_CLASS_ID` | `NUMBER` | Identifier of the wait class
`WAIT_CLASS#` | `NUMBER` | Number of the wait class
`WAIT_CLASS` | `VARCHAR2(64)` | Name of the wait class
`WAIT_TIME` | `NUMBER` | A nonzero value is the session's last wait time. A zero value means the session is currently waiting.
`SECONDS_IN_WAIT` | `NUMBER` | If `WAIT_TIME` = `0`, then `SECONDS_IN_WAIT` is the seconds spent in the current wait condition. If `WAIT_TIME` > `0`, then `SECONDS_IN_WAIT` is the seconds since the start of the last wait, and `SECONDS_IN_WAIT` - `WAIT_TIME` / `100` is the active seconds since the last wait ended.
`STATE` | `VARCHAR2(19)` | Wait state: `0 - WAITING` (the session is currently waiting) `-2 - WAITED UNKNOWN TIME` (duration of last wait is unknown) `-1 - WAITED SHORT TIME` (last wait <1/100th of a second) `>0 - WAITED KNOWN TIME` (`WAIT_TIME` = duration of last wait)
`SERVICE_NAME` | `VARCHAR2(64)` | Service name of the session
`SQL_TRACE` | `VARCHAR2(8)` | Indicates whether SQL tracing is enabled (`ENABLED`) or disabled (`DISABLED`)
`SQL_TRACE_WAITS` | `VARCHAR2(5)` | Indicates whether wait tracing is enabled (`TRUE`) or not (`FALSE`)
`SQL_TRACE_BINDS` | `VARCHAR2(5)` | Indicates whether bind tracing is enabled (`TRUE`) or not (`FALSE`)

Table 7-5 COMMAND Column of V$SESSION and Corresponding Commands

Number | Command | Number | Command
--- | --- | --- | ---
`1` | `CREATE TABLE` | `2` | `INSERT`
`3` | `SELECT` | `4` | `CREATE CLUSTER`
`5` | `ALTER CLUSTER` | `6` | `UPDATE`
`7` | `DELETE` | `8` | `DROP CLUSTER`
`9` | `CREATE INDEX` | `10` | `DROP INDEX`
`11` | `ALTER INDEX` | `12` | `DROP TABLE`
`13` | `CREATE SEQUENCE` | `14` | `ALTER SEQUENCE`
`15` | `ALTER TABLE` | `16` | `DROP SEQUENCE`
`17` | `GRANT OBJECT` | `18` | `REVOKE OBJECT`
`19` | `CREATE SYNONYM` | `20` | `DROP SYNONYM`
`21` | `CREATE VIEW` | `22` | `DROP VIEW`
`23` | `VALIDATE INDEX` | `24` | `CREATE PROCEDURE`
`25` | `ALTER PROCEDURE` | `26` | `LOCK`
`27` | `NO-OP` | `28` | `RENAME`
`29` | `COMMENT` | `30` | `AUDIT OBJECT`
`31` | `NOAUDIT OBJECT` | `32` | `CREATE DATABASE LINK`
`33` | `DROP DATABASE LINK` | `34` | `CREATE DATABASE`
`35` | `ALTER DATABASE` | `36` | `CREATE ROLLBACK SEG`
`37` | `ALTER ROLLBACK SEG` | `38` | `DROP ROLLBACK SEG`
`39` | `CREATE TABLESPACE` | `40` | `ALTER TABLESPACE`
`41` | `DROP TABLESPACE` | `42` | `ALTER SESSION`
`43` | `ALTER USER` | `44` | `COMMIT`
`45` | `ROLLBACK` | `46` | `SAVEPOINT`
`47` | `PL/SQL EXECUTE` | `48` | `SET TRANSACTION`
`49` | `ALTER SYSTEM` | `50` | `EXPLAIN`
`51` | `CREATE USER` | `52` | `CREATE ROLE`
`53` | `DROP USER` | `54` | `DROP ROLE`
`55` | `SET ROLE` | `56` | `CREATE SCHEMA`
`57` | `CREATE CONTROL FILE` | `59` | `CREATE TRIGGER`
`60` | `ALTER TRIGGER` | `61` | `DROP TRIGGER`
`62` | `ANALYZE TABLE` | `63` | `ANALYZE INDEX`
`64` | `ANALYZE CLUSTER` | `65` | `CREATE PROFILE`
`66` | `DROP PROFILE` | `67` | `ALTER PROFILE`
`68` | `DROP PROCEDURE` | `70` | `ALTER RESOURCE COST`
`71` | `CREATE MATERIALIZED VIEW LOG` | `72` | `ALTER MATERIALIZED VIEW LOG`
`73` | `DROP MATERIALIZED VIEW LOG` | `74` | `CREATE MATERIALIZED VIEW`
`75` | `ALTER MATERIALIZED VIEW` | `76` | `DROP MATERIALIZED VIEW`
`77` | `CREATE TYPE` | `78` | `DROP TYPE`
`79` | `ALTER ROLE` | `80` | `ALTER TYPE`
`81` | `CREATE TYPE BODY` | `82` | `ALTER TYPE BODY`
`83` | `DROP TYPE BODY` | `84` | `DROP LIBRARY`
`85` | `TRUNCATE TABLE` | `86` | `TRUNCATE CLUSTER`
`91` | `CREATE FUNCTION` | `92` | `ALTER FUNCTION`
`93` | `DROP FUNCTION` | `94` | `CREATE PACKAGE`
`95` | `ALTER PACKAGE` | `96` | `DROP PACKAGE`
`97` | `CREATE PACKAGE BODY` | `98` | `ALTER PACKAGE BODY`
`99` | `DROP PACKAGE BODY` | `100` | `LOGON`
`101` | `LOGOFF` | `102` | `LOGOFF BY CLEANUP`
`103` | `SESSION REC` | `104` | `SYSTEM AUDIT`
`105` | `SYSTEM NOAUDIT` | `106` | `AUDIT DEFAULT`
`107` | `NOAUDIT DEFAULT` | `108` | `SYSTEM GRANT`
`109` | `SYSTEM REVOKE` | `110` | `CREATE PUBLIC SYNONYM`
`111` | `DROP PUBLIC SYNONYM` | `112` | `CREATE PUBLIC DATABASE LINK`
`113` | `DROP PUBLIC DATABASE LINK` | `114` | `GRANT ROLE`
`115` | `REVOKE ROLE` | `116` | `EXECUTE PROCEDURE`
`117` | `USER COMMENT` | `118` | `ENABLE TRIGGER`
`119` | `DISABLE TRIGGER` | `120` | `ENABLE ALL TRIGGERS`
`121` | `DISABLE ALL TRIGGERS` | `122` | `NETWORK ERROR`
`123` | `EXECUTE TYPE` | `157` | `CREATE DIRECTORY`
`158` | `DROP DIRECTORY` | `159` | `CREATE LIBRARY`
`160` | `CREATE JAVA` | `161` | `ALTER JAVA`
`162` | `DROP JAVA` | `163` | `CREATE OPERATOR`
`164` | `CREATE INDEXTYPE` | `165` | `DROP INDEXTYPE`
`167` | `DROP OPERATOR` | `168` | `ASSOCIATE STATISTICS`
`169` | `DISASSOCIATE STATISTICS` | `170` | `CALL METHOD`
`171` | `CREATE SUMMARY` | `172` | `ALTER SUMMARY`
`173` | `DROP SUMMARY` | `174` | `CREATE DIMENSION`
`175` | `ALTER DIMENSION` | `176` | `DROP DIMENSION`
`177` | `CREATE CONTEXT` | `178` | `DROP CONTEXT`
`179` | `ALTER OUTLINE` | `180` | `CREATE OUTLINE`
`181` | `DROP OUTLINE` | `182` | `UPDATE INDEXES`
`183` | `ALTER OPERATOR` |  |