How to retrieve multiple rows from a SQL Server stored procedure using Pyodbc in Jupyter Notebook - sql

Question

I have a stored procedure in SQL Server which takes 3 input parameters and can produce multiple rows as output. In fact, it is returning 20 rows in my current case. For instance, if I manually execute the stored procedure from SSMS, I get the following code and partial output, respectively:
Code:
DECLARE #return_value int
EXEC #return_value = [Coverage-Source].[ReadCoverageMapping]
#client = N'Capital BlueCross',
#lineOfBusiness = N'Commercial',
#distributionChannel = N'Retail'
SELECT 'Return Value' = #return_value
GO
Output:
ID Attribute Value CoverageName
-----------------------------------------
1 Copay Yes Retail Base
2 Copay No Retail
. . . .
. . . .
Return Value
20
Now, while I try to read the stored procedure from jupyter notebook using pyodbc, I get an error
Procedure or function ReadCoverageMapping has too many arguments specified
I want output something like this:
ID Attribute Value CoverageName
------------------------------------------
1 Copay Yes Retail Base
2 Copay No Retail
. . . .
. . . .
I tried this code:
client = 'Capital BlueCross'
lineOfBusiness = 'Commercial'
distributionChannel = 'Retail'
cnxn = pyodbc.connect(r'Driver={SQL
Server};Server=MyServer;Database=COV_SRCE_TEST;Trusted_Connection=yes;')
sql = """\
DECLARE #out nvarchar(max);
EXEC [cov_srce_test].[coverage-source].ReadCoverageMapping #client = ?, #lineOfBusiness = ?,
#distributionChannel = ?, #param_out = #out OUTPUT;
SELECT #out AS the_output;
"""
values = (client, lineOfBusiness, distributionChannel)
cnxn.execute(sql, values)
rows = cnxn.fetchall()
while rows:
print(rows)
if cnxn.nextset():
rows = cnxn.fetchall()
else:
rows = None
Is there any way to achieve this? I tried using multiple ways, but couldn't find a solution.

Answer 1

Those batches are different. Looks like it should be:
sql = """\
DECLARE #return_value int
EXEC #return_value = [Coverage-Source].[ReadCoverageMapping]
#client = ?,
#lineOfBusiness = ?,
#distributionChannel = ?
SELECT 'Return Value' = #return_value
"""
which will output two resultsets, one from the stored procedure, and a second one for the Return value which you can probably omit.