object getClob(connection conn, string querystring)

Reads value of a clob field returned by querystring. This function works for one field at time.

Parameters	`conn -` Database connection to a Oracle database `querystring -` Select querystring (example. select lob from table)
Returns	string containing clob data, or `null` if no rows were found.
Throws	`SQLException -` If SQL error occured `IOException -` If error occured while writing to a clob