Use simple jython UDF. Its 3 lines of code 04.09.2013 18:04 пользователь "Sajid Raza" <windcl...@gmail.com> написал:
> For my two cents' worth I agree, it's nicer to have coalesce than the > conditional operator. > > On Sep 4, 2013, at 8:50 AM, Something Something <mailinglist...@gmail.com> > wrote: > > > What if you've 10 fields? > > > > > > On Wed, Sep 4, 2013 at 4:30 AM, Ruslan Al-Fakikh <metarus...@gmail.com > >wrote: > > > >> Hi, > >> > >> I think you could mimic it with an expression like this: > >> b = foreach a generate ((field1 is null) ? ((field2 is null) ? null : > >> field2) : field1); > >> > >> Hope that helps, > >> Ruslan > >> > >> > >> On Wed, Sep 4, 2013 at 9:50 AM, Something Something < > >> mailinglist...@gmail.com> wrote: > >> > >>> Is there a UDF in Piggybank (or somewhere) that will mimic > functionality > >> of > >>> the COALESCE function in MySQL: > >> > http://www.w3resource.com/mysql/comparision-functions-and-operators/coalesce-function.php > >>> > >>> I know it will be very (very) easy to write this, but just don't want > to > >>> create one if one already exists. I looked but couldn't find one. > >>> > >>> Please let me know. Thanks. > >> >
