Adds max_child_sortkey to acs_objects, uses select for update to incr
tree_sortkey (fixes concurrency problems and substantially improves
performance), drop group_elem_idx_container_idx (not useful) and
acs_objects_context_object_idx (which is superflous since there is an
identical unique constraint). changes acs_objects_get_tree_sortkey to
be isstrict/iscachable fixes a bug in acs_objects_context_id_up_tr on
both oracle an postgres.
See
http://openacs.org/forums/message-view?message_id=142769 for discussion.
