Hi Tariq, Thank you for explanation. I have multiple conditions to verify in a relation. How can check multiple expressions for one field?
Thanks Soniya On Sun, Apr 28, 2013 at 4:20 AM, Mohammad Tariq <[email protected]> wrote: > Hello Soniya, > > It's like the ternary or the conditional operator available in java > and works just like that. Here is the example provided in the reference > manual : > > *Suppose we have relation A.* > > A = LOAD 'data' AS (f1:int, f2:int, B:bag{T:tuple(t1:int,t2:int)}); > > DUMP A; > (10,1,{(2,3),(4,6)}) > (10,3,{(2,3),(4,6)}) > (10,6,{(2,3),(4,6),(5,7)}) > > *In this example the modulo operator is used with fields f1 and f2.* > > X = FOREACH A GENERATE f1, f2, f1%f2; > > DUMP X; > (10,1,0) > (10,3,1) > (10,6,4) > > *In this example the bincond operator is used with fields f2 and B. The > condition is "f2 equals 1"; if the condition is true, return 1; if the > condition is false, return the count of the number of tuples in B.* > > X = FOREACH A GENERATE f2, (f2==1?1:COUNT(B)); > > DUMP X; > (1,1L) > (3,2L) > (6,3L) > > > It clearly shows that when "f2==1", which is the first case the exp > evaluates to true, hence "1" is returned and count(B) is returned in rest > of the 2 cases as exp evaluates to false. > > What were you trying to do and what exactly is the problem which you are > facing? > > Warm Regards, > Tariq > https://mtariq.jux.com/ > cloudfront.blogspot.com > > > On Sat, Apr 27, 2013 at 8:23 PM, soniya B <[email protected]> > wrote: > > > Hi, > > > > Anyone can explain me about use of BinCond function with an example? I > am > > trying a lot but didn't work it. > > > > Regards > > Soniya > > >
