>>-LN--(--expression--)----------------------------------------><
The schema is SYSFUN.
Returns the natural logarithm of the argument (same as LOG).
The argument can be of any built-in numeric data type. It is converted to double-precision floating-point number for processing by the function.
The result of the function is a &dpfpn;. The result can be null; if the argument is null, the result is the null value.