pyodbc 不会引发 SQL Server 错误

Question

我正在尝试使用pyodbc（使用 Python 2.7）调用存储过程以将记录插入到 SQL Server 2012 表中。我正在传递一个临时表。

我转储了我的 sql，当通过 SQL Server 管理控制台执行时，它产生了以下外键错误：

Msg 547, Level 16, State 0, Procedure spInsertBondTickerValues, Line 26
The INSERT statement conflicted with the FOREIGN KEY constraint "FK__BondTickerValue__756D6ECB".
The conflict occurred in database "QuantDev", table "dbo.Tickers".
The statement has been terminated.

但是，pyodbc 没有引发异常。我将如何测试生成的游标或连接以了解发生了问题，以及如何获取错误消息？

非常感谢。

编辑这是完整的 sql 文本：

DECLARE @rawTbl [dbo].TickerValueTableType
INSERT INTO @rawTbl (Ticker, BBName, LastValue, ValueTime, SourceDescr) VALUES
('IBM', 'Equity', 179.230000, '2013-11-01 00:00:00.000000', 'Bloomberg'),
('SPX', 'Index', 1803.710000, '2013-12-10 00:00:00.000000', 'Bloomberg')
EXEC [dbo].spInsertBondTickerValues @rawTbl

EDIT 2 以下是相关的 Python 代码：

def execSQLwithCommit(self, sql):
    cursor = self.conn.cursor()
    cursor.execute(sql)
    self.conn.commit()

以前通过什么方式建立连接的地方

self.conn = pyodbc.connect(app      = appName,
                           driver   = '{SQL Server Native client 11.0}',
                           server   = server,
                           database = db,
                           Trusted_Connection = 'yes')

Answer 1

我能够使用以下代码重新创建您的问题，但它会静默失败：

import pyodbc
cnxn = pyodbc.connect('DSN=myDb;')
cursor = cnxn.cursor()
sql = """   
DECLARE @rawTbl dbo.ClientAddressInputType;
INSERT INTO @rawTbl (ClientID, Addr1) VALUES 
(2, 'higgy'), 
(3, 'jiggy'); 
EXEC dbo.AddClientAddress @rawTbl
"""
cursor.execute(sql)
cursor.commit()
cnxn.close()

但是，我可以通过在sql 字符串的开头添加SET NOCOUNT ON; 来获取引发适当IntegrityError 异常的代码：

import pyodbc
cnxn = pyodbc.connect('DSN=myDb;')
cursor = cnxn.cursor()
sql = """   
SET NOCOUNT ON;
DECLARE @rawTbl dbo.ClientAddressInputType;
INSERT INTO @rawTbl (ClientID, Addr1) VALUES 
(2, 'higgy'), 
(3, 'jiggy'); 
EXEC dbo.AddClientAddress @rawTbl
"""
cursor.execute(sql)
cursor.commit()
cnxn.close()

导致

Traceback (most recent call last):
  File "C:\Users\Gord\Desktop\pyOdbc.py", line 12, in <module>
    cursor.execute(sql)
IntegrityError: ('23000', '[23000] [Microsoft][SQL Server Native Client 10.0][SQL Server]The INSERT statement conflicted with the FOREIGN KEY constraint "FK_ClientAddresses_Clients". The conflict occurred in database "myDb", table "dbo.Clients", column \'ClientID\'. (547) (SQLExecDirectW); [01000] [Microsoft][SQL Server Native Client 10.0][SQL Server]The statement has been terminated. (3621)')