I need to call a SqlServer stored procedure from python2.7 via pyodbc module with input parameter name.

I tried based on documentation by input parameter order:

cursor.execute('{CALL [SP_NAME](?,?)}',

('value', 'value'))

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'))

However this doesn't work. What's the correct syntax?

解決方案

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

The Bad News ("CALL")

I found that

sql = """\

{ CALL breakfast (@food=?, @person=?) }

"""

params = ('bacon','Gord')

crsr.execute(sql, params)

gave inconsistent results.

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

... and with the older {SQL Server} ODBC driver I just got the error

DataError: ('22018', '[22018] [Microsoft][ODBC SQL Server Driver]Invalid character value for cast specification (0) (SQLExecDirectW)')

The Good News ("EXEC")

I found that

sql = """\

EXEC breakfast @food=?, @person=?

"""

params = ('bacon','Gord')

crsr.execute(sql, params)

gave me the following (correct) result using both ODBC drivers

Gord likes to eat bacon

總結

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