txid_snapshot_in(PG_FUNCTION_ARGS)
{
	char	   *str = PG_GETARG_CSTRING(0);
	TxidSnapshot *snap;

	snap = parse_snapshot(str);

	PG_RETURN_POINTER(snap);
}
txid_snapshot_in(PG_FUNCTION_ARGS)
{
	char	   *str = PG_GETARG_CSTRING(0);
	TxidSnapshot *snap;

	snap = parse_snapshot(str);

	PG_RETURN_POINTER(snap);
}