插入無值到火鳥表

Question

我試圖插入包含無值成一隻火鳥表蟒蛇變量，但它會引發錯誤（當我插入隨機值，它工作正常）：

fdb.fbcore.DatabaseError: ('Error while executing SQL statement:\n- SQLCODE: -802\n- arithmetic exception, numeric overf 
low, or string truncation\n- string right truncation', -802, 335544321) 

python代碼如下：

import fdb 

con = fdb.connect(dsn='OFFICINE.gdb', user='SYSDBA', password='masterkey') 
cur = con.cursor() 

spec = None 

cur.execute("update ENTETEFACT set SPECIALITE = '%s' where N_FACTURE = '04139412' " %spec) 
con.commit() 

Answer 1

爲什麼你正在嘗試字符串格式化而不是傳遞參數？

cur.execute("update ENTETEFACT set SPECIALITE = %s where N_FACTURE = '04139412' ", [spec])