Python - pyodbc 调用带有参数名称的存储过程
我需要使用输入参数名称通过pyodbc模块从python2.7调用SqlServer存储过程.
I need to call a SqlServer stored procedure from python2.7 via pyodbc module with input parameter name.
我根据输入参数顺序尝试基于 文档:
I tried based on documentation by input parameter order:
cursor.execute('{CALL [SP_NAME](?,?)}',
('value', 'value'))
它有效，但我需要传递存储过程的参数名称，因为存储过程输入参数的顺序总是在变化.所以我需要按名称传递它们.
It works, but I need to pass parameter name of stored procedure because order of stored procedure input parameter always changes. So I need to pass them by name.
cursor.execute('{CALL [SP_NAME](@param1name,@param2name)}',
('value', 'value'))
然而这行不通.正确的语法是什么?
However this doesn't work. What's the correct syntax?
推荐答案
我在 SQL Server 2008 R2 中使用以下存储过程对此进行了测试:
I tested this using the following stored procedure in SQL Server 2008 R2:
CREATE PROCEDURE [dbo].[breakfast]
@person varchar(50) = 'nobody',
@food varchar(50) = 'tofu'
AS
BEGIN
SET NOCOUNT ON;
SELECT @person + ' likes to eat ' + @food
END
坏消息(CALL")
我发现
sql = """
{ CALL breakfast (@food=?, @person=?) }
"""
params = ('bacon','Gord')
crsr.execute(sql, params)
给出不一致的结果.
使用 {SQL Server Native Client 10.0} ODBC 驱动程序，它忽略参数 names 并将参数视为位置参数，产生 ...
With the {SQL Server Native Client 10.0} ODBC driver it ignored the parameter names and treated the parameters as positional, yielding ...
bacon likes to eat Gord
... 使用旧的 {SQL Server} ODBC 驱动程序，我刚刚收到错误
... and with the older {SQL Server} ODBC driver I just got the error
DataError: ('22018', '[22018] [Microsoft][ODBC SQL Server Driver]转换规范的字符值无效 (0) (SQLExecDirectW)')
DataError: ('22018', '[22018] [Microsoft][ODBC SQL Server Driver]Invalid character value for cast specification (0) (SQLExecDirectW)')
好消息(EXEC")
我发现了
sql = """
EXEC breakfast @food=?, @person=?
"""
params = ('bacon','Gord')
crsr.execute(sql, params)
使用两个 ODBC 驱动程序给了我以下(正确的)结果
gave me the following (correct) result using both ODBC drivers
Gord likes to eat bacon
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