pg_nd_stats_from_tuple()

static ND_STATS* pg_nd_stats_from_tuple ( HeapTuple  stats_tuple, int  mode  )

static

Definition at line 894 of file gserialized_estimate.c.

{
        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;
}

References STATISTIC_KIND_2D, and STATISTIC_KIND_ND.

Referenced by gserialized_gist_sel(), and pg_get_nd_stats().

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