[postgis-users] ST_Union on empty polygon loses SRID

[Jonathan Schultz]

Thanks for the quick response!

> => select postgis_full_version();
>                                                                                                    postgis_full_version                                                                                                    
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>  POSTGIS="3.1.0alpha1 f7a3648" [EXTENSION] PGSQL="120" GEOS="3.10.1-CAPI-1.16.0" PROJ="7.2.1" LIBXML="2.9.10" LIBJSON="0.13.1" LIBPROTOBUF="1.3.3" WAGYU="0.4.3 (Internal)" (core procs from "3.0.2 2fb2a18" need upgrade)

This is from Debian/unstable. Looks like I just need to wait for an 
update and the problem will go away.