Oracle中获取会话信息的两个函数分享

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1、 USERENV(OPTION)   　　返回当前的会话信息.   　　OPTION='ISDBA'若当前是DBA角色,则为TRUE,否则FALSE.   　　OPTION='LANGUAGE'返回数据库的字符集.   　　OPTION='SESSIONID'为当前会话标识符.   　　OPTION='ENTRYID'返回可审计的会话标识符.   　　OPTION='LANG'返回会话语言名称的ISO简记.   　　OPTION='INSTANCE'返回当前的实例.       OPTION='terminal'返回当前计算机名   　　SELECT USERENV('LANGUAGE') FROM DUAL; 2、sys_context

代码如下: 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.与系统视图v$session组合使用可以获得更多信息(客户端所使用的应用程序等) 

代码如下: 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;