零的创建问题的总和

Question

我想将零存储在Hbase的一列中。所以，我在猪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; 

，然后我正在做这样的

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

其抛出错误控制台上像

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

有什么办法，我总能在这种情况下，用了写零使用SUM或者SUM在这里使用全零的方式将会很有帮助。

谢谢。

Answer 1

试试这个 -

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 (h1:chararray,h2:chararray,h3:chararray); 

groupedIp = group splitDate by h1; 

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