Hello, the abbrev_converter is applied whenever it is defined. The values are sorted using the abbreviated comparator first using the shortened version, and if there is a tie the system asks the real full comparator to resolve it.
This article seems to be rather comprehensive: https://brandur.org/sortsupport On Sat, Jun 12, 2021 at 9:51 AM Han Wang <hanwg...@gmail.com> wrote: > Hi all, > > I am trying to implement a sort support function for geometry data types > in PostGIS with the new feature `SortSupport`. However, I have a question > about this. > > I think it is hardly to apply a sort support function to a complex data > type without the `abbrev_converter` to simply the data structure into a > single `Datum`. However, I do not know how the system determines when to > apply the converter. > > I appreciate any answers or suggestions. I am looking forward to hearing > from you. > > Best regards, > Han > -- Darafei "Komяpa" Praliaskouski OSM BY Team - http://openstreetmap.by/
