pgis_asmvt_transfn()

Datum pgis_asmvt_transfn

(

PG_FUNCTION_ARGS

)

Definition at line 78 of file lwgeom_out_mvt.c.

References mvt_agg_context::extent, mvt_agg_context::geom_name, mvt_agg_init_context(), mvt_agg_transfn(), mvt_agg_context::name, PG_FUNCTION_INFO_V1(), pgis_asmvt_finalfn(), and mvt_agg_context::row.

Referenced by ST_AsMVTGeom().

{
#ifndef HAVE_LIBPROTOBUF
        elog(ERROR, "Missing libprotobuf-c");
        PG_RETURN_NULL();
#else
        MemoryContext aggcontext;
        struct mvt_agg_context *ctx;

        if (!AggCheckCallContext(fcinfo, &aggcontext))
                elog(ERROR, "pgis_asmvt_transfn: called in non-aggregate context");
        MemoryContextSwitchTo(aggcontext);

        if (PG_ARGISNULL(0)) {
                ctx = palloc(sizeof(*ctx));
                ctx->name = "default";
                if (PG_NARGS() > 2 && !PG_ARGISNULL(2))
                        ctx->name = text_to_cstring(PG_GETARG_TEXT_P(2));
                ctx->extent = 4096;
                if (PG_NARGS() > 3 && !PG_ARGISNULL(3))
                        ctx->extent = PG_GETARG_INT32(3);
                ctx->geom_name = NULL;
                if (PG_NARGS() > 4 && !PG_ARGISNULL(4))
                        ctx->geom_name = text_to_cstring(PG_GETARG_TEXT_P(4));
                mvt_agg_init_context(ctx);
        } else {
                ctx = (struct mvt_agg_context *) PG_GETARG_POINTER(0);
        }

        if (!type_is_rowtype(get_fn_expr_argtype(fcinfo->flinfo, 1)))
                elog(ERROR, "pgis_asmvt_transfn: parameter row cannot be other than a rowtype");
        ctx->row = PG_GETARG_HEAPTUPLEHEADER(1);

        mvt_agg_transfn(ctx);
        PG_FREE_IF_COPY(ctx->row, 1);
        PG_RETURN_POINTER(ctx);
#endif
}

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