Peter Eisentraut <peter_e(at)gmx(dot)net> writes:
> Exporting PGINTERVALSTYLE causes errors of the following kind when 
> connecting to an older server version:
> psql: FATAL:  unrecognized configuration parameter "intervalstyle"
Ooops.
> (What is the use case for this variable anyway?  Is it there just 
> because PGDATESTYLE was there previously?)
Pretty much.  I'd be fine with taking it out entirely.
			regards, tom lane