please say the meaning of this code in your TEST_LIST_ITEM!! thank you(develper/2000)

[carbon107]

PROCEDURE set_up_list (plist in varchar2,pgroup in varchar2) IS
verrflag number:=0;
elistpopulationproblem exception;
BEGIN
verrflag := populate_group(pgroup); --WHAT IS MEANING??
if verrflag = 0 then ---WHY VERRRFLAG=0
clear_list(plist); --CLEAR_LIST IS WHAT
populate_list(plist,pgroup);
elsif verrflag = 1403 then ---WHY VERRFLAG=1403
null;
else
raise elistpopulationproblem; ---RAISE IS WHAT
end if;
exception
when others then
message('exception:could not populate'||plist||'with query in group ' ||pgroup||'.');
END;

[qfsb_p]

populate_group——对数据进行合法化检查

VERRRFLAG=0 ——表示合法则。。。

clear_list(plist)——清楚列表

verrflag = 1403 ——返回的oracle错误代码为1403则。。。。

elistpopulationproblem——否则抛出异常

populate_group,clear_list,elistpopulationproblem是用户自定义函数