Обсуждение: fulldisjunction - fd: Moved the index queries to work with paramters and

Log Message:
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Moved the index queries to work with paramters and improved the formula to check if to use an index prior to deciding
ifto use an index using the planner. It shows a clear improvement in performance. 

Modified Files:
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    fd:
        algstructs.c (r1.11 -> r1.12)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/fulldisjunction/fd/algstructs.c.diff?r1=1.11&r2=1.12)
        algstructs.h (r1.9 -> r1.10)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/fulldisjunction/fd/algstructs.h.diff?r1=1.9&r2=1.10)
        algutils.c (r1.14 -> r1.15)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/fulldisjunction/fd/algutils.c.diff?r1=1.14&r2=1.15)
        algutils.h (r1.9 -> r1.10)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/fulldisjunction/fd/algutils.h.diff?r1=1.9&r2=1.10)
        odmbfd.c (r1.15 -> r1.16)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/fulldisjunction/fd/odmbfd.c.diff?r1=1.15&r2=1.16)