SQL代码：-420，SQLSTATE：22018，SQLERRMC：BIGINT

[运行 DB2 UDB 版本 9] 为什么此 SQL 语句有效

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 

我收到一个错误SQL0420N 在字符串参数中发现无效字符 函数“BIGINT”。 SQLSTATE=22018.

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

第二条 SQL 语句不起作用是什么？？？

我对此失去了理智，因此我对临时表（EDMPROD.MQT_STB_FACTS）进行了简单的更改。

我没有将列输入为字符，然后将它们转换为 bigint，而是删除并重新创建了表，并将数据类型设置为 BIGINT(8)。

我从 SQL 语句中删除了强制转换，错误就消失了。

去搞清楚..........