MonetDB: holindex - Change of cost model formula.

[Eleni Petraki]

Changeset: b68a6e95a0de for MonetDB
URL: http://dev.monetdb.org/hg/MonetDB?cmd=changeset;node=b68a6e95a0de
Modified Files:
        monetdb5/extras/crackers/crackers_holistic.c
Branch: holindex
Log Message:

Change of cost model formula.
Negative weight means that we already have the optimal index.


diffs (12 lines):

diff --git a/monetdb5/extras/crackers/crackers_holistic.c 
b/monetdb5/extras/crackers/crackers_holistic.c
--- a/monetdb5/extras/crackers/crackers_holistic.c
+++ b/monetdb5/extras/crackers/crackers_holistic.c
@@ -108,7 +108,7 @@ changeWeight(FrequencyNode* node,int N,i
        double d; /*distance from optimal piece(L1)*/
        p = 2 * (node->c);
        Sp =((double)N)/p;      
-       d = ABS(Sp - L1);
+       d = Sp - L1;
        /*fprintf(stderr,"p=%d Sp=%lf d=%lf\n",p,Sp,d);*/
        if (node->f2!=0)
                node->weight = ((double)(node->f1)/(double)(node->f2)) * d;
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