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

Oracle:

select to_binary_double(c1) from t;

HiRDB:

select to_binary_double(c1) from t;
/* SQLWays: Could not convert 'to_binary_double' */