-Re: pig support for in operator
Jonathan Coveney 2012-12-14, 07:03
This is a join. This is equivalent to.
A = load 'test_data' as (value);
B = foreach 'filter_data' as (x:int);
C = join A by value, B by x using 'replicated';
D = foreach C generate value as value;
One thing pig does not currently do nicely is let you create a relation
from nothing (ie define the relation to filter against inline) but this can
be worked around easily and the point remains.
2012/12/13 Young Ng <[EMAIL PROTECTED]>
> I think you can accomplish this task by writing a UDF which takes two
> one for the check list, the other for the value to check, and return a
> to indicate if it's true.
> Young Wu
> On Dec 13, 2012, at 6:07 PM, Haitao Yao <[EMAIL PROTECTED]> wrote:
> > hi, all
> > Can pig support in operator, like this:
> > A = load 'test_data' as (value);
> > B = filter A by value in (1,2,3,4,5);
> > I think this is really useful.
> > thanks.
> > Haitao Yao
> > [EMAIL PROTECTED]
> > weibo: @haitao_yao
> > Skype: haitao.yao.final