Oracle中獲取會話信息的兩個函數分享，oracle會話

Oracle中獲取會話信息的兩個函數分享，oracle會話

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'返回數據庫的字符集. 
　　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;