转：
在实际PL/SQL编程中，我们要对动态取出来的一组数据，进行For循环处理，其基本程序逻辑为：
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create or replace procedure getidlist
is l_idlist varchar2(200);
begin l_idlist:='1,2,3,4';
for brrs in (select * from bldroom where bldroomid in (l_idlist))
loop
brrs.structure:='钢混';
end loop;
end;
/show err; |
1、编译该程序，可以正常通过；
2、执行该程序exec getidlist，系统提示：ORA-01722: invalid number，ORA-06512: at "TT.GETIDLIST", line 6
解决方案：
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CREATE OR REPLACE TYPE type_split IS TABLE OF VARCHAR2 (4000);
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create or replace function split(p_list varchar2,p_sep varchar2 := ',') return type_split pipelined
IS l_idx pls_integer;
v_list varchar2(50) := p_list;
begin
loop
l_idx := instr(v_list,p_sep);
if l_idx > 0 then
pipe row(substr(v_list,1,l_idx-1));
v_list := substr(v_list,l_idx+length(p_sep));
else
pipe row(v_list);
exit;
end if;
end loop;
return;
end split;
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此时修改getidlist代码如下：
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create or replace procedure getidlist
is l_idlist varchar2(200);
begin l_idlist:='1,2,3,4';
for brrs in (select * from bldroom where bldroomid in (select column_value from table(split(l_idlist,','))))
loop
brrs.structure:='钢混';
end loop;
end;
/show err; |
执行：exec getidlist;
提示错误：ORA-22905: cannot access rows from a non-nested table item
再次修改getidlist代码如下：
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create or replace procedure getidlist
is brRow bldroom%rowtype;
l_idlist varchar2(200);
begin l_idlist:='1,2,3,4';
for idrs in (select column_value from table(split(l_idlist,',')))
loop
select * into brRow from bldroom where bldroomid=idrs.column_value;
brRow.structure:='ssss';
end loop;
end;
/show err; |
OK,搞定。
附：PL/SQL表---table()函数用法
摘录
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/*利用table()函数，我们可以将PL/SQL返回的结果集代替table。oracle内存表在查询和报表的时候用的比较多，它的速度相对物理表要快几十倍。*//*simple example：1、table()结合数组：*/create or replace type t_test as object(
id integer,
rq date,
mc varchar2(60));create or replace type t_test_table as table of t_test;
create or replace function f_test_array(n in number default null) return t_test_table
asv_test t_test_table := t_test_table();beginfor i in 1 .. nvl(n,100) loop
v_test.extend();v_test(v_test.count) := t_test(i,sysdate,'mc'||i);
end loop;
return v_test;
end f_test_array;
/select * from table(f_test_array(10));
select * from the(select f_test_array(10) from dual);
/*2、table()结合PIPELINED函数：*/create or replace function f_test_pipe(n in number default null) return t_test_table PIPELINED
asv_test t_test_table := t_test_table();beginfor i in 1 .. nvl(n,100) loop
pipe row(t_test(i,sysdate,'mc'||i));
end loop;
return;
end f_test_pipe;
/select * from table(f_test_pipe(20));
select * from the(select f_test_pipe(20) from dual);
/*3、table()结合系统包：*/create table test (id varchar2(20));
insert into test values('1');
commit;
explain plan for select * from test;
select * from table(dbms_xplan.display);
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关于错误：ORA-22905: cannot access rows from a non-nested table item 的解决方案，不知各位大侠有没有更好的解决方案？请指教。