擅长:python、mysql、java
<p>尝试使用以下语法:</p>
<pre><code>airlines_new = FOREACH Airlines_data_schema GENERATE Year,Month,DayofMonth,DayofWeek, myfuncs.zero(DepTime_actual) AS DepTime_actual_new,myfuncs.zero.CRSDeptime AS CRSDeptime_new,myfuncs.zero.Arrtime_actual AS Arrtime_actual_new,myfuncs.zero.CRSArrtime AS CRSArrtime_new,UniqueCarrier,FlightNum,TailNum_Plane,ActualElapsedTime,CRSElapsedTime,Airtime,Arrdelay,Depdelay,Origin,Dest,Distance,Taxiin,Taxiout,Cancelled,CancellationCode,Diverted,CarrierDelay,WeatherDelay,NASDelay,SecurityDelay,LateAircraftDelay ;
</code></pre>