ASCII scalar function
The ASCII function returns the ASCII code value of the leftmost character of the argument as an integer.
The schema is SYSFUN.
- An expression that returns a built-in character string value. In a Unicode database, the expression
can also return a graphic string, in which case it is first converted to a character string before
the function is evaluated. The maximum length is:
- 4000 bytes for a VARCHAR
- 1,048,576 bytes for a CLOB
The result of the function is always INTEGER.
The result can be null; if the argument is null, the result is the null value.