python3.2 - 使用cx-oracle更新clob

Question

我將一些代碼從perl遷移到python。我可以讀取CLOB我需要用下面的代碼更新：

* cur.execute（ 「」」選擇，a.Category ，a.Status ... ，c.name ，a.orig_operator FROM表 where stuff「」「） for result in cur： startTimes = result [18] .read（）#stringify from lob stopTimes = result [19] .read（） lobsterCode = result [17] .read ）*

我似乎找不到關於如何更新一個clob列的例子？使用perl我選擇更新，獲取bin_locator，然後使用DBI中的ora_lob_write。我正在尋找示例顯示python equilivent

Answer 1

道歉，我沒有Python 3.2。這是Python 2.7。

在Oracle：

scott@XE_11g> CREATE TABLE t (id NUMBER, c CLOB); 

Table created. 

scott@XE_11g> INSERT INTO t VALUES (1, 'Happy families are all alike; every unhappy family is unhappy in its own way.'); 

1 row created. 

scott@XE_11g> INSERT INTO t VALUES (2, q'[You don't know about me without you have read a book by the name of The Adventures of Tom Sawyer; but that ain't no matter.]'); 

1 row created. 

scott@XE_11g> COMMIT; 

Commit complete. 

scott@XE_11g> 

現在，在Python：

import cx_Oracle 

connection = cx_Oracle.connect('scott/tiger@XE') 
cursor = connection.cursor() 
new_clob = cursor.var(cx_Oracle.CLOB) 
new_clob.setvalue(0,'It was a bright cold day in April, and the clocks were striking thirteen. ') 
key_id = cursor.var(cx_Oracle.NUMBER) 
key_id.setvalue(0,2) 

cursor.execute("""UPDATE t 
        SET c = :p_clob 
        WHERE id = :p_key""" 
,    p_clob = new_clob 
,    p_key = key_id 
       ) 
connection.commit() 

而且，早在甲骨文再次：

scott@XE_11g> SELECT c FROM t WHERE id = 2; 

C 
---------------------------------------------------------------------------------------------------- 
It was a bright cold day in April, and the clocks were striking thirteen. 

scott@XE_11g> 

希望這有助於。