Oracle中獲取會話信息的兩個函數(shù)分享

更新時間：2014年12月20日 14:58:06 投稿：junjie

這篇文章主要介紹了Oracle中獲取會話信息的兩個函數(shù)分享,本文分別講解了USERENV和兩個函數(shù)sys_context,并對可以獲取哪些信息作了介紹,需要的朋友可以參考下

1、 USERENV(OPTION)
　　返回當前的會話信息.
　　OPTION='ISDBA'若當前是DBA角色,則為TRUE,否則FALSE.
　　OPTION='LANGUAGE'返回數(shù)據(jù)庫的字符集.
　　OPTION='SESSIONID'為當前會話標識符.
　　OPTION='ENTRYID'返回可審計的會話標識符.
　　OPTION='LANG'返回會話語言名稱的ISO簡記.
　　OPTION='INSTANCE'返回當前的實例.
OPTION='terminal'返回當前計算機名
　　SELECT USERENV('LANGUAGE') FROM DUAL;
2、sys_context

復制代碼代碼如下:

select   

SYS_CONTEXT('USERENV','TERMINAL') terminal,   

SYS_CONTEXT('USERENV','LANGUAGE') language,   

SYS_CONTEXT('USERENV','SESSIONID') sessionid,   

SYS_CONTEXT('USERENV','INSTANCE') instance,   

SYS_CONTEXT('USERENV','ENTRYID') entryid,   

SYS_CONTEXT('USERENV','ISDBA') isdba,   

SYS_CONTEXT('USERENV','NLS_TERRITORY') nls_territory,   

SYS_CONTEXT('USERENV','NLS_CURRENCY') nls_currency,   

SYS_CONTEXT('USERENV','NLS_CALENDAR') nls_calendar,   

SYS_CONTEXT('USERENV','NLS_DATE_FORMAT') nls_date_format,   

SYS_CONTEXT('USERENV','NLS_DATE_LANGUAGE') nls_date_language,   

SYS_CONTEXT('USERENV','NLS_SORT') nls_sort,   

SYS_CONTEXT('USERENV','CURRENT_USER') current_user,   

SYS_CONTEXT('USERENV','CURRENT_USERID') current_userid,   

SYS_CONTEXT('USERENV','SESSION_USER') session_user,   

SYS_CONTEXT('USERENV','SESSION_USERID') session_userid,   

SYS_CONTEXT('USERENV','PROXY_USER') proxy_user,   

SYS_CONTEXT('USERENV','PROXY_USERID') proxy_userid,   

SYS_CONTEXT('USERENV','DB_DOMAIN') db_domain,   

SYS_CONTEXT('USERENV','DB_NAME') db_name,   

SYS_CONTEXT('USERENV','HOST') host,   

SYS_CONTEXT('USERENV','OS_USER') os_user,   

SYS_CONTEXT('USERENV','EXTERNAL_NAME') external_name,   

SYS_CONTEXT('USERENV','IP_ADDRESS') ip_address,   

SYS_CONTEXT('USERENV','NETWORK_PROTOCOL') network_protocol,   

SYS_CONTEXT('USERENV','BG_JOB_ID') bg_job_id,   

SYS_CONTEXT('USERENV','FG_JOB_ID') fg_job_id,   

SYS_CONTEXT('USERENV','AUTHENTICATION_TYPE') authentication_type,   

SYS_CONTEXT('USERENV','AUTHENTICATION_DATA') authentication_data   

from dual

3.與系統(tǒng)視圖v$session組合使用可以獲得更多信息(客戶端所使用的應用程序等)

復制代碼代碼如下:

select * 

  from v$session se, 

       (select SYS_CONTEXT('USERENV', 'TERMINAL') terminal, 

               SYS_CONTEXT('USERENV', 'LANGUAGE') language, 

               SYS_CONTEXT('USERENV', 'SESSIONID') sessionid, 

               SYS_CONTEXT('USERENV', 'INSTANCE') instance, 

               SYS_CONTEXT('USERENV', 'ENTRYID') entryid, 

               SYS_CONTEXT('USERENV', 'ISDBA') isdba, 

               SYS_CONTEXT('USERENV', 'NLS_TERRITORY') nls_territory, 

               SYS_CONTEXT('USERENV', 'NLS_CURRENCY') nls_currency, 

               SYS_CONTEXT('USERENV', 'NLS_CALENDAR') nls_calendar, 

               SYS_CONTEXT('USERENV', 'NLS_DATE_FORMAT') nls_date_format, 

               SYS_CONTEXT('USERENV', 'NLS_DATE_LANGUAGE') nls_date_language, 

               SYS_CONTEXT('USERENV', 'NLS_SORT') nls_sort, 

               SYS_CONTEXT('USERENV', 'CURRENT_USER') current_user, 

               SYS_CONTEXT('USERENV', 'CURRENT_USERID') current_userid, 

               SYS_CONTEXT('USERENV', 'SESSION_USER') session_user, 

               SYS_CONTEXT('USERENV', 'SESSION_USERID') session_userid, 

               SYS_CONTEXT('USERENV', 'PROXY_USER') proxy_user, 

               SYS_CONTEXT('USERENV', 'PROXY_USERID') proxy_userid, 

               SYS_CONTEXT('USERENV', 'DB_DOMAIN') db_domain, 

               SYS_CONTEXT('USERENV', 'DB_NAME') db_name, 

               SYS_CONTEXT('USERENV', 'HOST') host, 

               SYS_CONTEXT('USERENV', 'OS_USER') os_user, 

               SYS_CONTEXT('USERENV', 'EXTERNAL_NAME') external_name, 

               SYS_CONTEXT('USERENV', 'IP_ADDRESS') ip_address, 

               SYS_CONTEXT('USERENV', 'NETWORK_PROTOCOL') network_protocol, 

               SYS_CONTEXT('USERENV', 'BG_JOB_ID') bg_job_id, 

               SYS_CONTEXT('USERENV', 'FG_JOB_ID') fg_job_id, 

               SYS_CONTEXT('USERENV', 'AUTHENTICATION_TYPE') authentication_type, 

               SYS_CONTEXT('USERENV', 'AUTHENTICATION_DATA') authentication_data 

          from dual) base 

 where se.AUDSID = base.sessionid;