>>-TIMESTAMP_ISO--(--expression--)-----------------------------><
The schema is SYSFUN.
Returns a timestamp value based on date, time or timestamp argument. If the argument is a date, it inserts zero for all the time elements. If the argument is a time, it inserts the value of CURRENT DATE for the date elements and zero for the fractional time element.
The argument must be a date, timestamp, or a valid character string representation of a date or timestamp that is neither a CLOB nor a LONG VARCHAR.
The result of the function is TIMESTAMP. The result can be null; if the argument is null, the result is the null value.