relational

Author	SHA1	Message	Date
LtWorf	3978259f4a	- improved an optimization, to produce a simpler select condition under certain circumstances git-svn-id: http://galileo.dmi.unict.it/svn/relational/trunk@343 014f5005-505e-4b48-8d0a-63407b615a7c	2011-11-07 19:01:33 +07:00