gserialized_gist_consistent()

Datum gserialized_gist_consistent

(

PG_FUNCTION_ARGS

)

Definition at line 1254 of file gserialized_gist_nd.c.

{
        GISTENTRY *entry = (GISTENTRY*) PG_GETARG_POINTER(0);
        StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
        bool result;
        char gidxmem[GIDX_MAX_SIZE];
        GIDX *query_gbox_index = (GIDX*)gidxmem;
 
        /* PostgreSQL 8.4 and later require the RECHECK flag to be set here,
           rather than being supplied as part of the operator class definition */
        bool *recheck = (bool *) PG_GETARG_POINTER(4);
 
        /* We set recheck to false to avoid repeatedly pulling every "possibly matched" geometry
           out during index scans. For cases when the geometries are large, rechecking
           can make things twice as slow. */
        *recheck = false;
 
        POSTGIS_DEBUG(4, "[GIST] 'consistent' function called");
 
        /* Quick sanity check on query argument. */
        if ( DatumGetPointer(PG_GETARG_DATUM(1)) == NULL )
        {
                POSTGIS_DEBUG(4, "[GIST] null query pointer (!?!), returning false");
                PG_RETURN_BOOL(false); /* NULL query! This is screwy! */
        }
 
        /* Quick sanity check on entry key. */
        if ( DatumGetPointer(entry->key) == NULL )
        {
                POSTGIS_DEBUG(4, "[GIST] null index entry, returning false");
                PG_RETURN_BOOL(false); /* NULL entry! */
        }
 
        /* Null box should never make this far. */
        if ( gserialized_datum_get_gidx_p(PG_GETARG_DATUM(1), query_gbox_index) == LW_FAILURE )
        {
                POSTGIS_DEBUG(4, "[GIST] null query_gbox_index!");
                PG_RETURN_BOOL(false);
        }
 
        /* Treat leaf node tests different from internal nodes */
        if (GIST_LEAF(entry))
        {
                result = gserialized_gist_consistent_leaf(
                             (GIDX*)DatumGetPointer(entry->key),
                             query_gbox_index, strategy);
        }
        else
        {
                result = gserialized_gist_consistent_internal(
                             (GIDX*)DatumGetPointer(entry->key),
                             query_gbox_index, strategy);
        }
 
        PG_RETURN_BOOL(result);
}

References gserialized_gist_consistent_internal(), gserialized_gist_consistent_leaf(), and LW_FAILURE.

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