Yes, the "missing" parameter is what I was looking for. Many thanks, Zhiqing
On Tue, 24 May 2022 at 21:28, Shawn Heisey <[email protected]> wrote: > On 5/24/22 13:48, WU, Zhiqing wrote: > > Is there any setting in Facet API I could change to get the 'field = > null' > > group? > > I found a "facet.missing" parameter which might do what you're after. > > > https://solr.apache.org/guide/8_8/faceting.html#field-value-faceting-parameters > > Thanks, > Shawn > >
