HiRDB hasn't equivalent for Unistr function. SQLWays leaves it as is and adds message /*Сould not convert ' Unistr '*/.

Oracle:

SELECT UNISTR('abc\00e5\00f1\00f6') FROM t;

HiRDB:

SELECT UNISTR('abc\00e5\00f1\00f6') FROM t;
/* Сould not convert 'UNISTR' */