Pig Query Doubt

[Sivaji]

Hi i am struck ed in PIG query can please help me any one below are reuirement

two bags 

 BagA
(101,Hari)
(102,Nani)
(105,Siva)

BagB
(102,Nani)
(106,Ram)

expected out 1: BagA-BagB
                       (101,Hari)
                      (105,Siva)

expected out 1: BagA-BagB
                       (101,Hari)
                      (105,Siva)
                      (106,Ram)
can you please any one help me how we are going to do this Prob ?

[Vallinayagam]

Hello,

For your first query SUBTRACT function will do the job, which returns a new Bag composed of tuples of BagA are not in the BagB.

For your second query DIFF function works well, which returns a new Bag composed of tuples of one Bag (BagA / BagB) but not in the other.

Note : Assuming both the Bags are fit into memory, If this is not the case performance degradation would happen.

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Many Thanks,
S.Vallinayagam