Cursor and Triggers.Please guide

Question

This is a cross post.no offence please
I have written a trigger with a cursor
and been advised to close the cursor
in code called by triggers
Can anyone tell me why this is useful?

Answer 1

As Tom Kyte points out
http://asktom.oracle.com/pls/ask/f?p=4950:8:11220850869708805739::NO::F4950_P8_DISPLAYID,F4950_P8_CRITERIA:1089433252941
and we can check:
SQL> select n.name, s.value from
  2  v$mystat s, v$statname n
  3  where s.statistic# = n.statistic#
  4  and n.name like '%cursor%';
&nbsp
NAME                                          VALUE
opened cursors cumulative                       665
opened cursors current                           26
session cursor cache hits                         0
session cursor cache count                        0
cursor authentications                           46
&nbsp
SQL> declare
  2   cursor s is select * from emp;
  3  begin
  4   open s;
  5  end;
  6  /
&nbsp
PL/SQL procedure successfully completed.
&nbsp
SQL> select n.name, s.value from
  2  v$mystat s, v$statname n
  3  where s.statistic# = n.statistic#
  4  and n.name like '%cursor%';
&nbsp
NAME                                          VALUE
opened cursors cumulative                       670
opened cursors current                           26
session cursor cache hits                         0
session cursor cache count                        0
cursor authentications                           47local cursor is closed whan it is gone out of scope.
Scope here is an anonimous block.
Whan the scope is "global", cursor keeps it's state
between calls.
Rgds.