several aggregate functions do not check the number of arguments and do not 
correctly check for a type "bag"
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                 Key: PIG-673
                 URL: https://issues.apache.org/jira/browse/PIG-673
             Project: Pig
          Issue Type: Bug
         Environment: i686 i386 GNU/Linux

            Reporter: Araceli Henley



DIFF expects two bags as the argument. But in this negative test case we pass:
1) there is a single argument to diff instead of two,
2) The argument should be a bag but is an int.

TEST: AggregateFunc_190

 A =LOAD '/user/pig/tests/data/types/DataAll' USING PigStorage() AS ( Fint:int, 
Flong:long, Fdouble:double, Ffloat:float, Fchar:chararray, 
Fchararray:chararray, Fbytearray:bytearray, Fmap:map[], Fbag:BAG{ t:tuple( 
name, age, avg ) }, Ftuple:( name:chararray, age:int, avg:float) );
B =GROUP A ALL; 
X =FOREACH B GENERATE  DIFF( A.Fint) + DIFF( A.Fint); 
STORE X INTO '/user/pig/tests/results/araceli.1234381533/AggregateFunc_190.out' 
USING PigStorage();

ERROR 1000: Error during parsing. Atomic field expected but found non-atomic 
field

TEST AggregateFunc_1901 

A =LOAD '/user/pig/tests/data/types/DataAll' USING PigStorage() AS ( Fint:int, 
Flong:long, Fdouble:double, Ffloat:float, Fchar:chararray, 
Fchararray:chararray, Fbytearray:bytearray, Fmap:map[], Fbag:BAG{ t:tuple( 
name, age, avg ) }, Ftuple:( name:chararray, age:int, avg:float) );
B =GROUP A ALL; 
X =FOREACH B GENERATE  DIFF( A.Fint, A.Fint) + DIFF( A.Fint, A.Fint);
 STORE X INTO 
'/user/pig/tests/results/araceli.1234467894/AggregateFunc_1901.out' USING 
PigStorage();

ERROR 1000: Error during parsing. Atomic field expected but found non-atomic 
field

TEST AggregateFunc_1902 

 A =LOAD '/user/pig/tests/data/types/DataAll' USING PigStorage() AS ( Fint:int, 
Flong:long, Fdouble:double, Ffloat:float, Fchar:chararray, 
Fchararray:chararray, Fbytearray:bytearray, Fmap:map[], Fbag:BAG{ t:tuple( 
name, age, avg ) }, Ftuple:( name:chararray, age:int, avg:float) );
B =GROUP A ALL; 
X =FOREACH B GENERATE  DIFF( A.Fint, A.Fint + A.Fint); 
STORE X INTO 
'/user/pig/tests/results/araceli.1234467894/AggregateFunc_1902.out' USING 
PigStorage();

throws error: ERROR 1039: Incompatible types in Add Operator left hand side:bag 
right hand side:bag

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