I've spend much time on this:
orcl = cx_Oracle.connect(usrpass+'@'+dbase)
c = orcl.cursor()
c.execute(sq)
dane = c.fetchall()
orcl.close() # before reading LOB to str
wkt = dane[0][0].read()
And I get: DatabaseError: Invalid handle!
But the following code works, because connection is closed after reading LOB to STR:
orcl = cx_Oracle.connect(usrpass+'@'+dbase)
c = orcl.cursor()
c.execute(sq)
dane = c.fetchall()
wkt = dane[0][0].read()
orcl.close() # after reading LOB to str[http://stackoverflow.com/questions/8646968/how-do-i-read-cx-oracle-lob-data-in-python/12590977#12590977]
