read is a method of the class SapDB_LongReader.
With this method you read a LONG value (LOB).
read (count = -1)
Number of characters to be read
? If you called the method without parameters: rest of the LONG value
? If the end of the LONG value has been reached: empty string
This allows you to use objects of the class SapDB_LongReader like objects of the class file.