我需要通过 callproc 调用“sp_executesql”的帮助（我需要它作为 RPC）。这是我的代码：
import pymssql
conn = pymssql.connect(host='11.22.33.44:1433', user='sa', password='XYZ', database='AdventureWorks')
cur = conn.cursor()
cur.callproc("sp_executesql", 'SELECT * FROM AdventureWorks.HumanResources.Employee WHERE BusinessEntityID = 109')
我收到此错误：
File "executesql.py", line 4, in <module>
cur.callproc("sp_executesql", 'SELECT * FROM AdventureWorks.HumanResources.Employee WHERE BusinessEntityID = 109')
File "pymssql.pyx", line 357, in pymssql.Cursor.callproc (pymssql.c:4238)
self._returnvalue = proc.execute()
File "_mssql.pyx", line 1289, in _mssql.MSSQLStoredProcedure.execute (_mssql.c:12177)
check_cancel_and_raise(rtc, self.conn)
File "_mssql.pyx", line 1322, in _mssql.check_cancel_and_raise (_mssql.c:12473)
return maybe_raise_MSSQLDatabaseException(conn)
File "_mssql.pyx", line 1366, in _mssql.maybe_raise_MSSQLDatabaseException (_mssql.c:13067)
raise ex
_mssql.MSSQLDatabaseException: (214, "Procedure expects parameter '@statement' of type 'ntext/nchar/nvarchar'.DB-Lib error message 214, severity 16:\nGeneral SQL Server error: Check messages from the SQL Server\n")
运行其他存储过程很顺利。将字符串作为 unicode (u'Select...') 运行会出现此错误：
Traceback (most recent call last):
File "executesql.py", line 4, in <module>
cur.callproc("sp_executesql", u'SELECT * FROM AdventureWorks.HumanResources.Employee WHERE BusinessEntityID = 109')
File "pymssql.pyx", line 354, in pymssql.Cursor.callproc (pymssql.c:4177)
raise NotSupportedError('Unable to determine database type')
pymssql.NotSupportedError: Unable to determine database type
你知道如何克服这个吗？
SQL Server 是 Microsoft SQL Server 2012 - 11.0.2100.60 (X64) Feb 10 2012 19:39:15 版权所有 (c) Microsoft Corporation Enterprise Edition (64-bit) on Windows NT 6.1 (Build 7601: Service Pack 1) (Hypervisor)
非常感谢