DBMS_UTILITY.FORMAT_ERROR_STACK
http://blog.csdn.net/strawbingo/archive/2008/10/29/3175996.aspx
Oracle Magazine:
eg:
DECLARE
V_INDEX_NAM VARCHAR2(500);
BEGIN
select index_name
INTO V_INDEX_NAM
from dba_ind_statistics
where wner = 'CUSTOMER'
and index_name = 'PK_PB';
EXCEPTION
WHEN OTHERS THEN
dbms_output.put_line (SQLERRM);
dbms_output.put_line( dbms_utility.format_error_backtrace);
END;
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