Details
-
Bug
-
Status: Closed
-
Trivial
-
Resolution: Fixed
-
0.15.0
-
None
Description
http://pig.apache.org/docs/r0.15.0/func.html#isempty
The documentation example uses a left outer join, but this produces a flat tuple, which is invalid for IsEmpty. I believe the example in the docs should be:
SSN = load 'ssn.txt' using PigStorage() as (ssn:long); SSN_NAME = load 'students.txt' using PigStorage() as (ssn:long, name:chararray); /* do a cogroup of SSN with SSN_Name */ X = COGROUP SSN by ssn, SSN_NAME by ssn; /* only keep those ssn's for which there is no name */ Y = filter X by IsEmpty(SSN_NAME);