oracle 11g ORA-06502:PL/SQL:数字或值错误:字符串缓冲区太小
Posted
技术标签:
【中文标题】oracle 11g ORA-06502:PL/SQL:数字或值错误:字符串缓冲区太小【英文标题】:oracle 11g ORA-06502: PL/SQL: numeric or value error: character string buffer too small 【发布时间】:2021-03-22 08:15:21 【问题描述】:在oracle 11g r2中,我们想获取所有的列和拼接,它发出:ORA-06502: PL/SQL: numeric or value error: string buffer too small,如何修改?
第一步:创建表:
create table test.history_session as select * from dba_hist_active_sess_history where 1=1;
第 2 步:测试:
declare
column_list1 varchar2(32767);
column_list2 varchar2(32767);
i number;
l number;
BEGIN
column_list1:='';
column_list2:='';
i:=0;
l:=0;
FOR v_column_name IN (SELECT owner, table_name, column_name,data_length,data_type FROM dba_tab_columns WHERE owner ='TEST' and table_name='HISTORY_SESSION'
and data_type in ('VARCHAR2','NVARCHAR2','NUMBER','CHAR') and data_length <=255 order by column_name) LOOP
if v_column_name.data_type='NUMBER' then
v_column_name.column_name:='to_char('||v_column_name.column_name||',''99999999999999999.99'')';
end if;
if l <3700 then
column_list1:=column_list1||v_column_name.column_name||chr(10)||'||''|'''||'||';
else
column_list2:=column_list2||v_column_name.column_name||chr(10)||'||''|'''||'||';
end if;
l:=l+v_column_name.data_length+10;
end loop;
dbms_output.put_Line(nvl(column_list1,' ')||nvl(column_list2,' '));
end;
/
错误:
declare
*
ERROR at line 1:
ORA-06502: PL/SQL: numeric or value error: character string buffer too small
ORA-06512: at line 14
我想知道如何修改?
【问题讨论】:
【参考方案1】:您不能将光标的变量设置为其他东西;这是错误的:
v_column_name.column_name:='to_char('||v_column_name.column_name| ...
改为声明一个局部变量,然后根据需要进行这些转换。像这样(以SCOTT
用户身份运行,所以我改用USER_TAB_COLUMNS
)。
SQL> CREATE TABLE history_session
2 (
3 id NUMBER
4 );
Table created.
SQL> DECLARE
2 column_list1 VARCHAR2 (32767);
3 column_list2 VARCHAR2 (32767);
4 l_column_name VARCHAR2 (200); --> local variable
5 i NUMBER;
6 l NUMBER;
7 BEGIN
8 column_list1 := '';
9 column_list2 := '';
10 i := 0;
11 l := 0;
12
13 FOR v_column_name IN ( SELECT --owner,
14 table_name,
15 column_name,
16 data_length,
17 data_type
18 FROM user_tab_columns
19 WHERE 1 = 1
20 -- AND owner = 'TEST'
21 AND table_name = 'HISTORY_SESSION'
22 AND data_type IN ('VARCHAR2',
23 'NVARCHAR2',
24 'NUMBER',
25 'CHAR')
26 AND data_length <= 255
27 ORDER BY column_name)
28 LOOP
29 IF v_column_name.data_type = 'NUMBER'
30 THEN
31 --v_column_name.column_name :=
32 l_column_name :=
33 'to_char('
34 || v_column_name.column_name
35 || ',''99999999999999999.99'')';
36 ELSE
37 l_column_name := v_column_name.column_name;
38 END IF;
39
40 IF l < 3700
41 THEN
42 column_list1 :=
43 column_list1 || l_column_name --v_column_name.column_name
44 || CHR (10) || '||''|''' || '||';
45 ELSE
46 column_list2 :=
47 column_list2 || l_column_name --v_column_name.column_name
48 || CHR (10) || '||''|''' || '||';
49 END IF;
50
51 l := l + v_column_name.data_length + 10;
52 END LOOP;
53
54 DBMS_OUTPUT.put_Line (NVL (column_list1, ' ') || NVL (column_list2, ' '));
55 END;
56 /
to_char(ID,'99999999999999999.99')
||'|'||
PL/SQL procedure successfully completed.
SQL>
结果看起来不太好,但我会把它留给你 - 修复它,现在该过程有点工作。
【讨论】:
以上是关于oracle 11g ORA-06502:PL/SQL:数字或值错误:字符串缓冲区太小的主要内容,如果未能解决你的问题,请参考以下文章
Oracle 生成 AWR 报告报错:ORA-06502,怎么破?
Oracle 生成 AWR 报告报错:ORA-06502,怎么破?
oracle ORA-06502:PL/SQL:数字或值错误:批量绑定:截断绑定
Oracle 存储过程无法生成 csv 文件 - ORA-06502: PL/SQL: numeric or value error: string buff