Oracle Bug 4458790 06502: PL/SQL: numeric or value error: character string buffer too small

Oralce的一些版本，当在函数里执行了min/max操作，并且这个min/MAX的参数是一个char型的字段

将出错，这是一个BUG,BUG号Bug 4458790

我测试了win的9.2.0.7没有问题，但是10.2.0.1由问题


SQL> select * from v$version;


BANNER
----------------------------------------------------------------
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod

PL/SQL Release 10.2.0.1.0 - Production

CORE 10.2.0.1.0 Production

TNS for 32-bit Windows: Version 10.2.0.1.0 - Production

NLSRTL Version 10.2.0.1.0 - Production



5 rows selected.




SQL> create table test(name char(5));


Table created.


SQL> insert into test values('a');


1 row created.


SQL> commit;


Commit complete.


SQL> create or replace function myf (p in varchar2) return char

2 is

3 v_1 char;

4 begin

5 select min(name) into v_1 from test;

6 return(v_1);

7 end myf;

8 /



Function created.


SQL> select myf('a') from dual;
select myf('a') from dual

*
ERROR at line 1:
ORA-06502: PL/SQL: numeric or value error: character string buffer too small

ORA-06512: at "A.MYF", line 5



解决方案



将表字段由char为varchar2型



drop table test;
create table test(name varchar2(5));
insert into test values('A');


SQL> select myf('a') from dual;


MYF('A')

---------------------------------
A



1 row selected.[@more@]

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