v30-0004-Faster-partition-pruning.patch contains:
+create table coll_pruning_multi (a text) partition by range
(substr(a, 1) collate "en_GB", substr(a, 1) collate "en_US");
This'll likely work okay on Linux. Other collate tests seem to use
COLLATE "POSIX or "C" so that work cross-platform.
--
David Rowley http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services