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Pig >> mail # user >> removing last item in a bag


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Re: removing last item in a bag
Hi, Chan:
That's fine. How did you generate the bag with different size in runtime.
It will be easier for me to come out a solution by this information. Thanks.

Johnny
On Tue, Mar 12, 2013 at 5:28 PM, Chan, Tim <[EMAIL PROTECTED]> wrote:

> Hi Johnny,
>
> I forgot to mention the bag will be varying sizes, so I can not use the
> method you described.
>
>
>
>
> On Tue, Mar 12, 2013 at 4:50 PM, Johnny Zhang <[EMAIL PROTECTED]>
> wrote:
>
> > Hi, Chan:
> > I guess you might generate the bag like this
> > A = load 'test.txt' as (f1:chararray,f2:chararray,f3:chararray);
> > B = group A by f1;
> > C = foreach B generate *;
> > describe C;
> > C: {group: chararray,{(f1: chararray)},{(f2: chararray)},{(f3:
> chararray)}}
> >
> > if this is the case, you can do:
> > A = load 'test.txt' as (f1:chararray,f2:chararray,f3:chararray);
> > B = group A by f1;
> > C = foreach B generate group, A.f1, A.f2;
> > describe C;
> > C: {group: chararray,{(f1: chararray)},{(f2: chararray)}}
> >
> > does this make sense? otherwise can you share your script which generates
> > the bag?
> >
> > Johnny Zhang
> >
> >
> > On Tue, Mar 12, 2013 at 4:33 PM, Chan, Tim <[EMAIL PROTECTED]> wrote:
> >
> > > How do I remove the last item in a bag.
> > >
> > > For example:
> > >
> > > (group_1,{(2012-12-15,a),(2012-12-17,a),(2012-12-23,c)})
> > >
> > >
> > > I would like to remove the last item so that the following is the
> result:
> > >
> > >
> > > (group_1,{(2012-12-15,a),(2012-12-17,a)})
> > >
> >
>