pgis_asflatgeobuf_transfn()

Datum pgis_asflatgeobuf_transfn

(

PG_FUNCTION_ARGS

)

Definition at line 44 of file lwgeom_out_flatgeobuf.c.

{
        MemoryContext aggcontext, oldcontext;
        char *geom_name = NULL;
        bool create_index = false;
        flatgeobuf_agg_ctx *ctx;
 
        POSTGIS_DEBUG(2, "calling pgis_asflatgeobuf_transfn");
 
        /* We need to initialize the internal cache to access it later via postgis_oid() */
        postgis_initialize_cache();
 
        if (!AggCheckCallContext(fcinfo, &aggcontext))
                elog(ERROR, "pgis_asflatgeobuf_transfn: called in non-aggregate context");
        oldcontext = MemoryContextSwitchTo(aggcontext);
 
        if (PG_ARGISNULL(0)) {
                if (PG_NARGS() > 2 && !PG_ARGISNULL(2))
                        create_index = PG_GETARG_BOOL(2);
                if (PG_NARGS() > 3 && !PG_ARGISNULL(3))
                        geom_name = text_to_cstring(PG_GETARG_TEXT_P(3));
                ctx = flatgeobuf_agg_ctx_init(geom_name, create_index);
        } else {
                ctx = (flatgeobuf_agg_ctx *) PG_GETARG_POINTER(0);
        }
 
        if (!type_is_rowtype(get_fn_expr_argtype(fcinfo->flinfo, 1)))
                elog(ERROR, "pgis_asflatgeobuf_transfn: parameter row cannot be other than a rowtype");
        ctx->row = PG_GETARG_HEAPTUPLEHEADER(1);
 
        flatgeobuf_agg_transfn(ctx);
        MemoryContextSwitchTo(oldcontext);
        PG_RETURN_POINTER(ctx);
}

References flatgeobuf_agg_ctx_init(), flatgeobuf_agg_transfn(), and flatgeobuf_agg_ctx::row.

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