fallbackSplit()

static void fallbackSplit ( GistEntryVector *  entryvec, GIST_SPLITVEC *  v  )

static

Definition at line 1279 of file gserialized_gist_2d.c.

{
        OffsetNumber i,
                                maxoff;
        BOX2DF     *unionL = NULL,
                           *unionR = NULL;
        int                     nbytes;
 
        maxoff = entryvec->n - 1;
 
        nbytes = (maxoff + 2) * sizeof(OffsetNumber);
        v->spl_left = (OffsetNumber *) palloc(nbytes);
        v->spl_right = (OffsetNumber *) palloc(nbytes);
        v->spl_nleft = v->spl_nright = 0;
 
        for (i = FirstOffsetNumber; i <= maxoff; i = OffsetNumberNext(i))
        {
                BOX2DF     *cur = (BOX2DF *) DatumGetPointer(entryvec->vector[i].key);
 
                if (i <= (maxoff - FirstOffsetNumber + 1) / 2)
                {
                        v->spl_left[v->spl_nleft] = i;
                        if (unionL == NULL)
                        {
                                unionL = (BOX2DF *) palloc(sizeof(BOX2DF));
                                *unionL = *cur;
                        }
                        else
                                adjustBox(unionL, cur);
 
                        v->spl_nleft++;
                }
                else
                {
                        v->spl_right[v->spl_nright] = i;
                        if (unionR == NULL)
                        {
                                unionR = (BOX2DF *) palloc(sizeof(BOX2DF));
                                *unionR = *cur;
                        }
                        else
                                adjustBox(unionR, cur);
 
                        v->spl_nright++;
                }
        }
 
        if (v->spl_ldatum_exists)
                adjustBox(unionL, (BOX2DF *) DatumGetPointer(v->spl_ldatum));
        v->spl_ldatum = BoxPGetDatum(unionL);
 
        if (v->spl_rdatum_exists)
                adjustBox(unionR, (BOX2DF *) DatumGetPointer(v->spl_rdatum));
        v->spl_rdatum = BoxPGetDatum(unionR);
 
        v->spl_ldatum_exists = v->spl_rdatum_exists = false;
}

References adjustBox().

Referenced by gserialized_gist_picksplit_2d().

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