_postgis_gserialized_stats()

Datum _postgis_gserialized_stats

(

PG_FUNCTION_ARGS

)

Definition at line 2020 of file gserialized_estimate.c.

References _postgis_gserialized_sel(), FALSE, nd_stats_to_json(), PG_FUNCTION_INFO_V1(), pg_get_nd_stats_by_name(), text2cstring(), and text_p_get_mode().

Referenced by estimate_selectivity().

{
        Oid table_oid = PG_GETARG_OID(0);
        text *att_text = PG_GETARG_TEXT_P(1);
        ND_STATS *nd_stats;
        char *str;
        text *json;
        int mode = 2; /* default to 2D mode */
        bool only_parent = FALSE; /* default to whole tree stats */

        /* Check if we've been asked to not use 2d mode */
        if ( ! PG_ARGISNULL(2) )
                mode = text_p_get_mode(PG_GETARG_TEXT_P(2));

        /* Retrieve the stats object */
        nd_stats = pg_get_nd_stats_by_name(table_oid, att_text, mode, only_parent);
        if ( ! nd_stats )
                elog(ERROR, "stats for \"%s.%s\" do not exist", get_rel_name(table_oid), text2cstring(att_text));

        /* Convert to JSON */
        str = nd_stats_to_json(nd_stats);
        json = cstring2text(str);
        pfree(str);
        pfree(nd_stats);
        PG_RETURN_TEXT_P(json);
}

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