T-SQL Execute from a stored procedure - sql

Question

I am trying to build an SQL inside a stored procedure and execute it using
EXEC sp_executesql
Now I defined a local table and tried to pass it in need to pass it in
CREATE TYPE mytabletypeAS TABLE (
StartDate DATETIME,
EndDate DATETIME,
Amount MONEY,
AccountId INT
);
The following happens in my stored procedure, what I am trying to do is to return the output produced by EXEC sp_executesql:
CREATE PROCEDURE attributevalues.sp_EvalClearingNetSpend
AS
BEGIN
DECLARE #OutPutTable AS mytabletype;
DECLARE #Sql AS NVARCHAR(MAX);
SET #Sql = 'INSERT INTO #OutPutTable SELECT StartDate,EndDate,Amount, AccountId FROM table1';
EXEC sp_executesql #Sql, N'#OutPutTable mytabletype OUTPUT', #OutPutTable OUTPUT;
SELECT * FROM #OutPutTable
END
The above is saying I cannot pass in OUTPUT with #OutPutTable
Help!!!

Answer 1

all i need to know is, is there a way I can get the values from a statement executed via EXEC and return it from my SP
Yes. But you can't do it with a table variable. You can pass a table variable into the nested batch with sp_executesql just like you pass one to a stored procedure, but it has to be marked readonly, and so you can't modify it.
You can see and modify existing temporary tables in nested batches, eg
drop table if exists table1
go
create table table1
(
StartDate DATETIME,
EndDate DATETIME,
Amount MONEY,
AccountId INT
)
insert into table1 values (getdate(),getdate(),1,1)
go
CREATE OR ALTER PROCEDURE EvalClearingNetSpend
AS
BEGIN
create table #t(
StartDate DATETIME,
EndDate DATETIME,
Amount MONEY,
AccountId INT)
Declare #Sql as NVARCHAR(MAX);
SET #Sql = 'INSERT INTO #T SELECT StartDate,EndDate,Amount, AccountId FROM table1';
EXEC sp_executesql #Sql
SELECT * FROM #T
END
go
exec EvalClearingNetSpend
outputs
StartDate EndDate Amount AccountId
----------------------- ----------------------- --------------------- -----------
2021-03-30 08:48:32.350 2021-03-30 08:48:32.350 1.00 1

Answer 2

This is an XY Problem. There is no need for the level of complexity you have put in the procedure. The table TYPE, the call to sys.sp_executesql, none of it is needed. Just put the SELECT statement of your "dynamic" query (it's not dynamic, as there's no object injection) in your Procedure:
CREATE PROCEDURE attributevalues.EvalClearingNetSpend AS --Removed sp_ prefix
BEGIN
SELECT StartDate,EndDate,Amount, AccountId FROM table1;
END;
GO
This completely avoids the error, that you are trying to use a table TYPE as an OUTPUT parameter, because you can't, but you don't need one here.

Answer 3

Not sure why you would go through the trouble of creating a Table Type parameter and populating it inside your from and then selecting from it. But lets say you do have to do this for some reason.
You can achieve this by doing this, no need to use output parameters at all, output parameter is used to return a scalar value, here you are getting a table back and then selecting from it:
CREATE PROCEDURE usp_EvalClearingNetSpend
AS
BEGIN
Declare #Sql as NVARCHAR(MAX);
SET #Sql = N' DECLARE #OutPutTable AS mytabletype;
INSERT INTO #OutPutTable
SELECT StartDate,EndDate,Amount, AccountId
FROM table1;
SELECT * FROM #OutPutTable
';
EXEC sp_executesql #Sql
END