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


i want calculate average time question.. 

a= load '/user/priyanka/book1.csv' (qid:chararray,at:datetime); b= foreach generate qid question,(datetime)at time; c= group b question; d= foreach c generate group, (datetime) avg(b.time);

getting error here:

please use explicit cast.

example of qid:56783978 , at: 23:45:30

how solve?

in last line calling avg on bag of datetime records. avg works on numeric types. https://pig.apache.org/docs/r0.11.0/api/org/apache/pig/builtin/avg.html

you might want convert times unix epochs. can calculate average of unix timestamps because numeric. http://pig.apache.org/docs/r0.11.0/api/org/apache/pig/builtin/tounixtime.html


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