Returns a BLOB representation of a string of any type. The first argument is a string expression whose value can be a character string, graphic string, or binary string. The second argument is an integer to specify the length attribute for the resulting binary string. The value must be between 1 and 15,728,640.
Example:
The following function returns a BLOB for the string 'This is a BLOB'.
SELECT BLOB('This is a BLOB') FROM T1