Question

我正在使用下面的DB2查询来获取特定字符长度来自CLASSICICATION Coulmn的条件，条件是“ \”之前的条件0，但出现错误。

select SERVICE_REQUEST,

(case when 
    (SUBSTR(CLASSIFICATION,LOCATE('\',CLASSIFICATION)-2,1))='0' then
        RIGHT(CLASSIFICATION,LENGTH(CLASSIFICATION)-LOCATE('\',CLASSIFICATION))
    ELSE CLASSIFICATION
end) 
as CLASSIFICATION2

 from REPORTDB3.MAXIMO_INDIA_SR_MONTHLY_REPORT where length(SERVICE_REQUEST)=7

错误：

An error occurred while processing the results. - 
The statement was not executed because a numeric argument of a scalar function is out of range.. SQLCODE=-138, SQLSTATE=22011, DRIVER=4.19.56

您能帮我吗？

关于， Sambit

已经不再需要Stackoverflow了

Answer 1

我相信您应该关注CLASSIFICATION列数据存在以下问题的情况：
-完全没有\个字符
-第1个第2个位置中的\字符
在这种情况下，您的查询会将负的第二个参数传递给SUBSTR函数，这是不允许的。

with REPORTDB3_MAXIMO_INDIA_SR_MONTHLY_REPORT(CLASSIFICATION, SERVICE_REQUEST) as (
values 
  ('ab0c|def', '1234567')
, ('\def', '1234567')
, ('a\def', '1234567')
, ('ab0c\def', '1234567')
)
select SERVICE_REQUEST, CLASSIFICATION,
case SUBSTR(CLASSIFICATION, case when pos>2 then pos end -2, 1)
  when '0' then SUBSTR(CLASSIFICATION, pos+1)
  else CLASSIFICATION
end as CLASSIFICATION2
from (
select SERVICE_REQUEST, CLASSIFICATION, LOCATE('\', CLASSIFICATION) as pos
from REPORTDB3_MAXIMO_INDIA_SR_MONTHLY_REPORT
where length(SERVICE_REQUEST)=7
)

更正我遇到错误的DB2查询

1 个答案: