pg_nd_stats_from_tuple()

static ND_STATS* pg_nd_stats_from_tuple ( HeapTuple  stats_tuple, int  mode  )

static

Definition at line 856 of file gserialized_estimate.c.

References STATISTIC_KIND_2D, and STATISTIC_KIND_ND.

Referenced by gserialized_gist_sel(), and pg_get_nd_stats().

{
        int stats_kind = STATISTIC_KIND_ND;
        int rv;
        ND_STATS *nd_stats;

        /* If we're in 2D mode, set the kind appropriately */
        if ( mode == 2 ) stats_kind = STATISTIC_KIND_2D;

    /* Then read the geom status histogram from that */

#if POSTGIS_PGSQL_VERSION < 100
        float4 *floatptr;
        int nvalues;

        rv = get_attstatsslot(stats_tuple, 0, 0, stats_kind, InvalidOid,
                                                NULL, NULL, NULL, &floatptr, &nvalues);

        if ( ! rv ) {
                POSTGIS_DEBUGF(2,
                                "no slot of kind %d in stats tuple", stats_kind);
                return NULL;
        }

        /* Clone the stats here so we can release the attstatsslot immediately */
        nd_stats = palloc(sizeof(float) * nvalues);
        memcpy(nd_stats, floatptr, sizeof(float) * nvalues);

        /* Clean up */
        free_attstatsslot(0, NULL, 0, floatptr, nvalues);
#else /* PostgreSQL 10 or higher */
        AttStatsSlot sslot;
        rv = get_attstatsslot(&sslot, stats_tuple, stats_kind, InvalidOid,
                                                 ATTSTATSSLOT_NUMBERS);
        if ( ! rv ) {
                POSTGIS_DEBUGF(2,
                                "no slot of kind %d in stats tuple", stats_kind);
                return NULL;
        }

        /* Clone the stats here so we can release the attstatsslot immediately */
        nd_stats = palloc(sizeof(float4) * sslot.nnumbers);
        memcpy(nd_stats, sslot.numbers, sizeof(float4) * sslot.nnumbers);

        free_attstatsslot(&sslot);
#endif

    return nd_stats;
}

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