Oracle初始化或INIT.ORA參數內用下划線開頭的都是隱含參數或不支持的參數。
通過執行下面的查詢能獲得所隱含參數﹕
select *
from SYS.X$KSPPI
where substr(KSPPINM,1,1) = '_';
下面的查詢顯示所有參數名和當前值﹕
select a.ksppinm "Parameter", b.ksppstvl "Session Value", c.ksppstvl "Instance Value"
from x$ksppi a, x$ksppcv b, x$ksppsv c
where a.indx = b.indx and a.indx = c.indx
and substr(ksppinm,1,1)='_'
order by a.ksppinm;
来自 “ ITPUB博客 ” ,链接:https://blog.itpub.net/33600/viewspace-266397/
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