问题描述
我遇到了猪的问题。我试图通过将它们组合在一起并计算数量来计算某个项目出现在某处的次数。然后我订购它们并将数量限制在前十名。当我转储有序集时,它工作正常,但是当我尝试转储有限集时,它每次都失败。我已经环顾四周,但一无所获。我能得到一些帮助吗?这是下面的代码。
lines = LOAD '/share/smallspoilers' USING PigStorage(':') AS (location:chararray,lNum:chararray,item:chararray,iNum:chararray);
newLines = FOREACH lines GENERATE(item),REPLACE(location,'"','') AS location;
newerLines = FOREACH newLines GENERATE(item),' ','') AS location;
newestLines = FOREACH newerLines GENERATE(location),REPLACE(item,'') AS item;
finalLines = FOREACH newestLines GENERATE(location),'') AS item;
filteredLines = FILTER finalLines BY (item matches 'Lamp');
grouped = GROUP filteredLines BY location;
counted = FOREACH grouped GENERATE group,COUNT(filteredLines) AS total;
ordered = ORDER counted BY total DESC;
prac = LIMIT ordered 10;
dump prac;
解决方法
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