If you want aggregate the dat by the truncated date, I think the only way to do it is using other field with the truncated date.
You can use a update request processor to calculate the truncated data (https://wiki.apache.org/solr/UpdateRequestProcessor) or add the field in indexing time. date:"2016-03-31T12:00:0Z" truncated_date_s:'2016-03-31' or truncated_date_i:20160331 (this should be more memory efficient) \-- /Yago Riveiro  On Mar 31 2016, at 10:08 am, Emir Arnautovic <emir.arnauto...@sematext.com> wrote: > Hi Robert, You can use range faceting and set use facet.range.gap to set how dates are "truncated". > > Regards, Emir > > On 31.03.2016 10:52, Robert Brown wrote: > Hi, > > Is it possible to facet by a date (solr.TrieDateField) but truncated > to the day, or even the hour? > > If not, are there any other options apart from storing that truncated > data in another (string?) field? > > Thanks, > Rob > > > > \-- Monitoring * Alerting * Anomaly Detection * Centralized Log Management Solr & Elasticsearch Support * <http://sematext.com/>
