HiRDB hasn't equivalent for Round(date) function with one parameter. SQLWays leaves it as is and adds message /* Сould not convert 'ROUND' */.

Oracle:

SELECT ROUND(col1) FROM t; 

HiRDB:

SELECT ROUND(col1) FROM t;
/* Сould not convert 'ROUND' */

HiRDB has equivalent for Round(date) function with second parameter as month date format. SQLWays changes it to roundmonth function.

Oracle:

SELECT ROUND(col1,'month'), 
ROUND(col1,'mon'), 
ROUND(col1,'mm'), 
ROUND(col1,'rm') FROM t;

HiRDB:

SELECT roundmonth(col1), 
roundmonth(col1), 
roundmonth(col1), 
roundmonth(col1) FROM t;

HiRDB hasn't equivalent for Round(date) function with second parameter as not month date format. SQLWays leaves it as is and adds message /* Сould not convert 'ROUND' */.

Oracle:

SELECT ROUND(col2,'day') FROM t;

HiRDB:

select ROUND(col2,'day') from t;
/* Сould not convert 'ROUND' */

HiRDB hasn't equivalent for Round(date) function with unknown parameter’s data type. SQLWays leaves it as is and adds message /* Сould not convert 'ROUND' */.

Oracle:

create table test_func_types1
(
 c1 float,
 c2 float
);
SELECT ROUND(c3) FROM test_func_types1;
SELECT ROUND(c4,1) FROM test_func_types1;
SELECT ROUND(c5, 'month') FROM test_func_types1;
SELECT ROUND(c6, 'day') FROM test_func_types1;

HiRDB:

create table test_func_types1
(
 c1 float,
 c2 float
);
SELECT ROUND(c3) FROM test_func_types1;
/* SQLWays: This conversion has inappropriate possibility */
SELECT ROUND(c4,1) FROM test_func_types1;
/* SQLWays: This conversion has inappropriate possibility */
SELECT roundmonth(c5) FROM test_func_types1;
SELECT ROUND(c6, 'day') FROM test_func_types1;
/* Сould not convert 'ROUND' */