db2 - SQLCODE:-420，SQLSTATE:22018，SQLERRMC:BIGINT

Question

[运行DB2 UDB版本9]为什么此SQL语句起作用

SELECT 
       CASE
       WHEN A.DAILYDOWNLOADSIZE is null THEN 0
    else bigint(A.DAILYDOWNLOADSIZE)
       END "DAILYDOWNLOADSIZE",
       CASE
       WHEN A.DAILYDOWNLOADTIME is null THEN 0
    else bigint(A.DAILYDOWNLOADTIME)
       END "DAILYDOWNLOADTIME"
FROM 
EDMPROD.MQT_STB_FACTS A 

...当这个不

SELECT DISTINCT 
bigint(A.CAMID) AS "CAMID",
bigint(A.RID) AS "RID",
A.SOFTWAREVERSION,
A.MODELNUMBER,
A.MANUFACTURERID,
A.MODDATE,
A.POSTTIME,
A.DELIVERYMETHOD,
bigint(A.UPTIME )  AS "UPTIME",
bigint(A.NUMBEROFRESETSSINCELASTSWDL )  AS "NUMBEROFRESETSSINCELASTSWDL",
bigint(A.NUMBEROFSEARCHSIGNALOSDTUNER1 ) AS "NUMBEROFSEARCHSIGNALOSDTUNER1",
bigint(A.NUMBEROFSEARCHSIGNALOSDTUNER2 ) AS "NUMBEROFSEARCHSIGNALOSDTUNER2",
bigint(A.NUMBEROFUSERDISKREFORMATS ) AS "NUMBEROFUSERDISKREFORMATS",
bigint(A.NUMBEROFSYSTEMDISKREFORMATS ) AS "NUMBEROFSYSTEMDISKREFORMATS",
bigint(A.NUMBEROFRECOVEREDDISKERRORS ) AS "NUMBEROFRECOVEREDDISKERRORS",
IPINFO,
       CASE
       WHEN A.DAILYDOWNLOADSIZE is null THEN 0
    else bigint(A.DAILYDOWNLOADSIZE)
       END "DAILYDOWNLOADSIZE",
       CASE
       WHEN A.DAILYDOWNLOADTIME is null THEN 0
    else bigint(A.DAILYDOWNLOADTIME)
       END "DAILYDOWNLOADTIME",
bigint(A.TOTALNUMBEROFDOWNLOADSSTARTED ) AS "TOTALNUMBEROFDOWNLOADSSTARTED",
bigint(A.TOTALNUMOFCOMPLETEDDLS ) AS "TOTALNUMOFCOMPLETEDDLS",
CURRENT_DATE AS "LOAD_DATE"
FROM 
EDMPROD.MQT_STB_FACTS A 

我收到错误SQL0420N在
功能“ BIGINT”。 SQLSTATE = 22018。

通过对查询进行故障诊断，我确认了罪魁祸首是两列DAILYDOWNLOADSIZE和DAILYDOWNLOADTIME。两者都必须从character（15）转换为bigint。

第二个SQL语句不起作用是什么？

Answer 1

我对此一无所知，因此在登台表（EDMPROD.MQT_STB_FACTS）中做了一个简单的更改。

我没有将列键入为字符，然后将其强制转换为bigint，而是删除并重新创建了数据类型设置为BIGINT（8）的表。

我从SQL语句中删除了强制转换，错误消失了。

去搞清楚..........