如果超过 78 个字符，则使用 TIMESTAMP 的 TO_CHAR 会引发 ORA-01877

我面临一个奇怪的问题

我正在尝试将一些数字转换为“单词”，只需这样做：

TO_CHAR(TO_TIMESTAMP(LPAD( nvl(trunc(99999999),0) , 9, '0'), 'FF9'),'FFSP')      AS amt_in_words

效果很好，输出是 “九千九百万九百九十九千九百九十九”

但是当我们尝试输入像 99999998 这样的数字时会发生什么？

TO_CHAR(TO_TIMESTAMP(LPAD( nvl(trunc(99999998),0) , 9, '0'), 'FF9'),'FFSP')      AS amt_in_words

它抛出错误“ORA-01877：字符串对于内部缓冲区来说太长”

好吧，这是一个较小的数字，它应该可以工作，但事实并非如此 我的理论是：它失败了，因为结果文本的长度是79个字符，并且由于某种原因失败了

建议1：使用强制转换（EXPR as VARCHAR(100) ） 但它给出了同样的错误

有任何想法吗？

澄清： 不幸的是，我正在研究 Oracle Fusion BI buplisher，似乎我不能使用任何 Pl/sql 过程，只能使用普通的选择查询

PL/SQL 似乎不会遇到同样的问题，因此您可以编写自己的函数来进行转换：

create or replace function spell_number(p_number number) return varchar2 is
  l_str varchar2(200);
begin
  l_str := to_char(to_timestamp(lpad(nvl(trunc(p_number), 0) , 9, '0'), 'FF9'), 'FFSP');
  return l_str;
end;
/

然后甚至更长的值也可以工作：

select spell_number(99999999) from dual;

AMT_IN_WORDS                                                                                       
----------------------------------------------------------------------------------------------------
NINETY-NINE MILLION NINE HUNDRED NINETY-NINE THOUSAND NINE HUNDRED NINETY-NINE                      


select spell_number(99999998) from dual;

AMT_IN_WORDS                                                                                       
----------------------------------------------------------------------------------------------------
NINETY-NINE MILLION NINE HUNDRED NINETY-NINE THOUSAND NINE HUNDRED NINETY-EIGHT                     

select spell_number(999999999) from dual;

AMT_IN_WORDS                                                                                       
----------------------------------------------------------------------------------------------------
NINE HUNDRED NINETY-NINE MILLION NINE HUNDRED NINETY-NINE THOUSAND NINE HUNDRED NINETY-NINE         

任何超过 9 位的数字都会忽略最低有效数字，但这似乎是 SP 格式的限制：

with t (num) as (
  select 99999998 from dual
  union all select 99999999 from dual
  union all select 999999999 from dual
  union all select 1000000000 from dual
  union all select 1000000001 from dual
  union all select 1000000010 from dual
  union all select 9999999999 from dual
  union all select 10000000000 from dual
  union all select 99999999999 from dual
  union all select 100000000000 from dual
)
select num, spell_number(num) as amt_in_words from t;

          NUM AMT_IN_WORDS                                                                                       
------------- ----------------------------------------------------------------------------------------------------
     99999998 NINETY-NINE MILLION NINE HUNDRED NINETY-NINE THOUSAND NINE HUNDRED NINETY-EIGHT                     
     99999999 NINETY-NINE MILLION NINE HUNDRED NINETY-NINE THOUSAND NINE HUNDRED NINETY-NINE                      
    999999999 NINE HUNDRED NINETY-NINE MILLION NINE HUNDRED NINETY-NINE THOUSAND NINE HUNDRED NINETY-NINE         
   1000000000 ONE HUNDRED  MILLION                                                                                
   1000000001 ONE HUNDRED  MILLION                                                                                
   1000000010 ONE HUNDRED  MILLION ONE                                                                            
   9999999999 NINE HUNDRED NINETY-NINE MILLION NINE HUNDRED NINETY-NINE THOUSAND NINE HUNDRED NINETY-NINE         
  10000000000 ONE HUNDRED  MILLION                                                                                
  99999999999 NINE HUNDRED NINETY-NINE MILLION NINE HUNDRED NINETY-NINE THOUSAND NINE HUNDRED NINETY-NINE         
 100000000000 ONE HUNDRED  MILLION