gserialized_estimated_extent()

Datum gserialized_estimated_extent

(

PG_FUNCTION_ARGS

)

Definition at line 2265 of file gserialized_estimate.c.

References ND_STATS_T::extent, FALSE, GBOX::flags, FLAGS_SET_GEODETIC, FLAGS_SET_M, FLAGS_SET_Z, geometry_estimated_extent(), ND_BOX_T::max, ND_BOX_T::min, PG_FUNCTION_INFO_V1(), pg_get_nd_stats_by_name(), text2cstring(), GBOX::xmax, GBOX::xmin, GBOX::ymax, and GBOX::ymin.

Referenced by geometry_estimated_extent(), and gserialized_gist_sel().

{
        char *nsp = NULL;
        char *tbl = NULL;
        text *col = NULL;
        char *nsp_tbl = NULL;
        Oid tbl_oid;
        ND_STATS *nd_stats;
        GBOX *gbox;
        bool only_parent = FALSE;

        if ( PG_NARGS() == 4 )
        {
                nsp = text2cstring(PG_GETARG_TEXT_P(0));
                tbl = text2cstring(PG_GETARG_TEXT_P(1));
                col = PG_GETARG_TEXT_P(2);
                only_parent = PG_GETARG_BOOL(3);
                nsp_tbl = palloc(strlen(nsp) + strlen(tbl) + 6);
                sprintf(nsp_tbl, "\"%s\".\"%s\"", nsp, tbl);
                tbl_oid = DatumGetObjectId(DirectFunctionCall1(regclassin, CStringGetDatum(nsp_tbl)));
                pfree(nsp_tbl);
        }
        else if ( PG_NARGS() == 3 )
        {
                nsp = text2cstring(PG_GETARG_TEXT_P(0));
                tbl = text2cstring(PG_GETARG_TEXT_P(1));
                col = PG_GETARG_TEXT_P(2);
                nsp_tbl = palloc(strlen(nsp) + strlen(tbl) + 6);
                sprintf(nsp_tbl, "\"%s\".\"%s\"", nsp, tbl);
                tbl_oid = DatumGetObjectId(DirectFunctionCall1(regclassin, CStringGetDatum(nsp_tbl)));
                pfree(nsp_tbl);
        }
        else if ( PG_NARGS() == 2 )
        {
                tbl = text2cstring(PG_GETARG_TEXT_P(0));
                col = PG_GETARG_TEXT_P(1);
                nsp_tbl = palloc(strlen(tbl) + 3);
                sprintf(nsp_tbl, "\"%s\"", tbl);
                tbl_oid = DatumGetObjectId(DirectFunctionCall1(regclassin, CStringGetDatum(nsp_tbl)));
                pfree(nsp_tbl);
        }
        else
        {
                elog(ERROR, "estimated_extent() called with wrong number of arguments");
                PG_RETURN_NULL();
        }

        /* Estimated extent only returns 2D bounds, so use mode 2 */
        nd_stats = pg_get_nd_stats_by_name(tbl_oid, col, 2, only_parent);

        /* Error out on no stats */
        if ( ! nd_stats ) {
                elog(WARNING, "stats for \"%s.%s\" do not exist", tbl, text2cstring(col));
                PG_RETURN_NULL();
        }

        /* Construct the box */
        gbox = palloc(sizeof(GBOX));
        FLAGS_SET_GEODETIC(gbox->flags, 0);
        FLAGS_SET_Z(gbox->flags, 0);
        FLAGS_SET_M(gbox->flags, 0);
        gbox->xmin = nd_stats->extent.min[0];
        gbox->xmax = nd_stats->extent.max[0];
        gbox->ymin = nd_stats->extent.min[1];
        gbox->ymax = nd_stats->extent.max[1];

        pfree(nd_stats);
        PG_RETURN_POINTER(gbox);
}

Here is the call graph for this function:

Here is the caller graph for this function: