Log Message:
-----------
Document the recently-understood hazard that a rollback can release row-level
locks that logically should not be released, because when a subtransaction
overwrites XMAX all knowledge of the previous lock state is lost. It seems
unlikely that we will be able to fix this before 8.3...
Modified Files:
--------------
pgsql/doc/src/sgml/ref:
select.sgml (r1.93 -> r1.94)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/select.sgml.diff?r1=1.93&r2=1.94)