V$SESSION说明

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 )

 

 

able 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