HiRDB hasn't equivalents for LNNVL function. SQLWays leaves it as is and adds message /* SQLWays: Could not convert 'LNNVL' */.

Oracle:

select * from t where lnnvl(col1 > 2); 

HiRDB:

select * from t where lnnvl(col1 > 2);
/* SQLWays: Could not convert 'lnnvl' */