Macro's are in and tested. No one will remove them. The unit tests ensure they keep working.
On Fri, Sep 11, 2015 at 3:38 PM, Elliot West <tea...@gmail.com> wrote: > Hi, > > I noticed some time ago the Hive Macro feature. To me at least this seemed > like an excellent addition to HQL, allowing the user to encapsulate complex > column logic as an independent HQL, reusable macro while avoiding the > complexities of Java UDFs. However, few people seem to be aware of them or > use them. If you are unfamiliar with macros they look like this: > > hive> create temporary macro MYSIGMOID(x DOUBLE) > > 2.0 / (1.0 + exp(-x)); > OK > > hive> select MYSIGMOID(1.0) from dual; > OK > > 1.4621171572600098 > > > As far as I can tell, they are no longer documented on the Hive wiki. > There is a tiny reference to them in the O'Reilly 'Programming Hive' book > (page 185). Can anyone advise me on the following: > > - Are there are plans to keep or remove this functionality? > - Are there are plans to document this functionality? > - Aside from limitations of HQL are there compelling reasons not to > use macros? > > Thanks - Elliot. > >
