Quickest way to check if a Hana table is empty

I would like to know the most efficient way to determine if a Hana table or dataset is empty, within the context of an 'IF' statement.

In the example procedure below I am doing a 'count' but I don't think that can be the most efficient way.  I don't know how the SQL 'EXISTS' clause could be used efficiently in an IF clause, or maybe there is some other Hana function?

create procedure blah... AS

BEGIN

  declare numrows integer;

  mydata = select ...;

  select count(*) into numrows from :mydata;

  if numrows > 0 then

      do some stuff

  end if;

END;