零的总和创造问题

Question

我想在Hbase中的一列中存储零。所以，我在Pig脚本中做了以下操作。

    data = load 'access_log_Jul95' using PigStorage(' ') as (ip:chararray, dash1:chararray, dash2:chararray, date:chararray, date1:chararray, getRequset:chararray, location:chararray, http:chararray, code:int, size:int);

splitDate = foreach data generate  0 AS size:int , ip as ip,  FLATTEN(STRSPLIT(date, ':')) as h;

groupedIp = group splitDate by h.$1;

然后我就是这样做

a = foreach groupedIp generate SUM(splitDate.size); 

在控制台上抛出错误，如

 Could not infer the matching function for org.apache.pig.builtin.SUM as multiple or none of them fit. Please use an explicit cast

在这种情况下，如果不使用SUM或者SUM在这里使用全零的方式，我总是可以写零的方式。

感谢。

Answer 1

试试这个 -

1 | "File1.doc"
1 | "File2.xls"
1 | "File1.pdf"
2 | "File2.doc"
2 | "File1.xls"
2 | "File2.pdf"