如何計算豬列中的兩列組的數量

Question

我從'n'列數列中生成了兩列（起點和終點）。現在我想爲這兩列組合計數。我無法得到結果。我得到錯誤的，錯誤1070：無法解析使用計數進口： 下面是我的腳本，

mydata = load '/Projects/Flightdata/1987/Rawdata' using PigStorage(',') as (year:int, month:int, dom:int, dow:int, deptime:long, crsdeptime:long, arrtime:long, crsarrtime:long, uniqcarcode:chararray, flightnum:long, tailnum:chararray, actelaptime:long, crselaptime:long, airtime:long, arrdeltime:long, depdeltime:long, origcode:chararray, destcode:chararray, dist:long, taxintime:long, taxiouttime:long, flightcancl:int, canclcode:chararray, diverted:int, carrierdel:long, weatherdel:long, nasdel:long, securitydel:long, lateaircraftdel:long); 

Step2 = foreach mydata generate origcode, destcode; 
grpby = group Step2 by (origcode, destcode) ; 
step3 = foreach grpby generate group.origcode as source, group.destcode as destination, Count(step2); 

在這裏我要生成地和目的地的每個組合計數。 任何指導都會有所幫助。

Answer 1

請參閱的隱語功能Pig documentation about case sensitivity

的名稱是區分大小寫的。