我有这个代码:
dsn = cx_Oracle.makedsn(hostname, port, sid)
orcl = cx_Oracle.connect(username + '/' + password + '@' + dsn)
curs = orcl.cursor()
sql = "select TEMPLATE from my_table where id ='6'"
curs.execute(sql)
rows = curs.fetchall()
print rows
template = rows[0][0]
orcl.close()
print template.read()
当我做print rows
时,我明白了:
[(<cx_Oracle.LOB object at 0x0000000001D49990>,)]
但是,当我做print template.read()
时,我收到此错误:
cx_Oracle.DatabaseError:句柄无效!
我如何获取和读取这些数据?谢谢。
我发现在使用cx_Oracle.LOB.read()方法之前关闭Oracle的连接时会发生这种情况。
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()
我得到:DatabaseError:句柄无效! 但是以下代码有效:
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
弄清楚了。我必须做这样的事情:
curs.execute(sql)
for row in curs:
print row[0].read()
你基本上必须遍历fetchall对象
dsn = cx_Oracle.makedsn(hostname, port, sid)
orcl = cx_Oracle.connect(username + '/' + password + '@' + dsn)
curs = orcl.cursor()
sql = "select TEMPLATE from my_table where id ='6'"
curs.execute(sql)
rows = curs.fetchall()
for x in rows:
list_ = list(x)
print(list_)