read_geos_from_partition()

static GEOSGeometry * read_geos_from_partition ( WindowObject  win_obj, uint32_t  i, bool *  is_null  )

static

Definition at line 90 of file lwgeom_window.c.

{
        GSERIALIZED* g;
        LWGEOM* lwg;
        GEOSGeometry* gg;
        Datum arg = WinGetFuncArgInPartition(win_obj, 0, i, WINDOW_SEEK_HEAD, false, is_null, NULL);
 
        if (*is_null) {
                /* So that the indexes in our clustering input array can match our partition positions,
                 * toss an empty point into the clustering inputs, as a pass-through.
                 * NOTE: this will cause gaps in the output cluster id sequence.
                 * */
                lwg = lwpoint_as_lwgeom(lwpoint_construct_empty(0, 0, 0));
                gg = LWGEOM2GEOS(lwg, LW_FALSE);
                lwgeom_free(lwg);
                return gg;
        }
 
        g = (GSERIALIZED*) PG_DETOAST_DATUM_COPY(arg);
        lwg = lwgeom_from_gserialized(g);
        gg = LWGEOM2GEOS(lwg, LW_TRUE);
        lwgeom_free(lwg);
        if (!gg) {
                *is_null = LW_TRUE;
        }
        return gg;
}

References LW_FALSE, LW_TRUE, LWGEOM2GEOS(), lwgeom_free(), lwgeom_from_gserialized(), lwpoint_as_lwgeom(), and lwpoint_construct_empty().

Referenced by ST_ClusterIntersectingWin().

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