hadoop - Pig multiply a number from a table to all the values of another table -


i have 2 tables:

a: (feature:chararray, value:float)  b:(multiplier:charray, value:float)

where table thousands of rows , b has 1 row.

what wanna take rows in , multiply a.value b.value.

e.g.

a:[('f1', 1.5) , ('f2', 2.3)]  b:[('mul', 2)]

i'd product table c

c: [('f1', 3), ('f2', 4.6)]

is there easy way so?

you can cross , foreach ... generate.

x = cross b; y = foreach x generate a::feature, a::value * b::value;

the above code has not been tested.


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