pgis_geometry_accum_transfn()

Datum pgis_geometry_accum_transfn

(

PG_FUNCTION_ARGS

)

Definition at line 122 of file lwgeom_accum.c.

{
        Oid arg1_typeid = get_fn_expr_argtype(fcinfo->flinfo, 1);
        MemoryContext aggcontext;
        ArrayBuildState *state;
        pgis_abs *p;
        Datum elem;
 
        if (arg1_typeid == InvalidOid)
                ereport(ERROR,
                        (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
                         errmsg("could not determine input data type")));
 
        if ( ! AggCheckCallContext(fcinfo, &aggcontext) )
        {
                /* cannot be called directly because of dummy-type argument */
                elog(ERROR, "%s called in non-aggregate context", __func__);
                aggcontext = NULL;  /* keep compiler quiet */
        }
 
        if ( PG_ARGISNULL(0) )
        {
                MemoryContext old = MemoryContextSwitchTo(aggcontext);
                p = (pgis_abs*) palloc(sizeof(pgis_abs));
                p->a = NULL;
                p->data = (Datum) NULL;
 
                if (PG_NARGS() == 3)
                {
                        Datum argument = PG_GETARG_DATUM(2);
                        Oid dataOid = get_fn_expr_argtype(fcinfo->flinfo, 2);
 
                        p->data = datumCopy(argument, get_typbyval(dataOid), get_typlen(dataOid));
 
                }
                MemoryContextSwitchTo(old);
        }
        else
        {
                p = (pgis_abs*) PG_GETARG_POINTER(0);
        }
        state = p->a;
        elem = PG_ARGISNULL(1) ? (Datum) 0 : PG_GETARG_DATUM(1);
        state = accumArrayResult(state,
                                 elem,
                                 PG_ARGISNULL(1),
                                 arg1_typeid,
                                 aggcontext);
        p->a = state;
 
        PG_RETURN_POINTER(p);
}

References pgis_abs::a, and pgis_abs::data.