HiRDB hasn't equivalent for Substrb function. SQLWays leaves it as is and adds message /*This conversion has inappropriate possibility*/.

Oracle:

SELECT SUBSTRB('ABCDEFG',3,4), SUBSTRB('ABCDEFG',3) FROM t;

HiRDB:

SELECT SUBSTR('ABCDEFG',3,4), SUBSTR('ABCDEFG',3) FROM t;
/*This conversion has inappropriate possibility*/