pgis_asmvt_serialfn()

Datum pgis_asmvt_serialfn

(

PG_FUNCTION_ARGS

)

Definition at line 210 of file lwgeom_out_mvt.c.

{
#ifndef HAVE_LIBPROTOBUF
        elog(ERROR, "ST_AsMVT: Compiled without protobuf-c support");
        PG_RETURN_NULL();
#else
        mvt_agg_context *ctx;
        bytea *result;
        elog(DEBUG2, "%s called", __func__);
        if (!AggCheckCallContext(fcinfo, NULL))
                elog(ERROR, "%s called in non-aggregate context", __func__);
 
        if (PG_ARGISNULL(0))
        {
                bytea *emptybuf = palloc(VARHDRSZ);
                SET_VARSIZE(emptybuf, VARHDRSZ);
                PG_RETURN_BYTEA_P(emptybuf);
        }
 
        ctx = (mvt_agg_context *) PG_GETARG_POINTER(0);
        result = mvt_ctx_serialize(ctx);
        if (ctx->trans_context)
                MemoryContextDelete(ctx->trans_context);
        ctx->trans_context = NULL;
        PG_RETURN_BYTEA_P(result);
#endif
}

References mvt_ctx_serialize(), result, and mvt_agg_context::trans_context.

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