gserialized_gist_union()

Datum gserialized_gist_union

(

PG_FUNCTION_ARGS

)

Definition at line 1409 of file gserialized_gist_nd.c.

References gidx_copy(), gidx_merge(), gserialized_gist_same(), and PG_FUNCTION_INFO_V1().

Referenced by gserialized_gist_penalty().

{
        GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
        int *sizep = (int *) PG_GETARG_POINTER(1); /* Size of the return value */
        int     numranges, i;
        GIDX *box_cur, *box_union;

        POSTGIS_DEBUG(4, "[GIST] 'union' function called");

        numranges = entryvec->n;

        box_cur = (GIDX*) DatumGetPointer(entryvec->vector[0].key);

        box_union = gidx_copy(box_cur);

        for ( i = 1; i < numranges; i++ )
        {
                box_cur = (GIDX*) DatumGetPointer(entryvec->vector[i].key);
                gidx_merge(&box_union, box_cur);
        }

        *sizep = VARSIZE(box_union);

        POSTGIS_DEBUGF(4, "[GIST] union called, numranges(%i), pageunion %s", numranges, gidx_to_string(box_union));

        PG_RETURN_POINTER(box_union);

}

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