SQL Server - Stored Procedure Return in Case Result Expression - sql

Question

I'd like to use a return from a procedure in a CASE statement. It can't be a function because that procedure returns an inserted key.
UPDATE TIM
SET CD_LINHA_EVENTO =
CASE WHEN
TIM.CD_SUBESTRUTURA_PARAMETRO = (SELECT TOP 1 SPZ.CD_SUBESTRUTURA_PARAMETRO FROM SUBESTRUTURA_PARAMETRO SPZ WITH (NOLOCK) WHERE SPZ.CD_SUBESTRUTURA = TIM.CD_SUBESTRUTURA
AND SPZ.FL_SELECAO = 1 ORDER BY SPZ.NR_ORDEM)
THEN
**EXEC [dbo].[SPRTO_NumeracaoEventos]**
ELSE
(SELECT MAX(TIM2.CD_LINHA_EVENTO) FROM #TB_INSERTED_MODIFIED TIM2 WITH(NOLOCK))
END
FROM #TB_INSERTED_MODIFIED TIM WITH (NOLOCK)
stored procedure [SPRTO_NumeracaoEventos]:
INSERT INTO TB_NUMERACAO_EVENTOS (VALOR) VALUES ('')
RETURN SCOPE_IDENTITY()
Thank you!

Answer 1

I wasn't able to figure out your table schema well enough to provide a direct answer, but I put together a way to use inserted identity values within an update trigger. Hopefully you can adapt this to fit your specific use case.
Have a look at this SQL Fiddle
As noted in the comments in the fiddle, this strategy is based on using the OUTPUT clause to capture identity values into a table variable. See http://msdn.microsoft.com/en-us/library/ms177564.aspx for more on the OUTPUT clause.
For rows where the case is true, we insert one row per true case into the secondary table and capture the identities to a table variable, then we update the underlying table with a row number join between the inserted virtual table and the identity table variable. Then we run another update for the rows where the case is false. Here's the relevant trigger code from my fiddle example.
-- Create a table variable to hold identity ID values from OUTPUT clause
DECLARE #table_2_ids TABLE (id INT NOT NULL)
-- Insert to our secondary table where the condition is true and capture the identity values to table variable
INSERT table_2 (textval)
OUTPUT inserted.id INTO #table_2_ids
SELECT 'from trigger'
FROM inserted
WHERE flag = 1
-- Use row number to match up rows from inserted where the condition is true to the identity value table variable
-- Update matched identity id to underlying table
UPDATE t
SET table_2_id = r.id, textval = textval + ' and trigger inserted to table_2'
FROM table_1 t
JOIN (SELECT id, ROW_NUMBER() OVER (ORDER BY id) rn FROM inserted WHERE flag = 1) i ON i.id = t.id
JOIN (SELECT id, ROW_NUMBER() OVER (ORDER BY id) rn FROM #table_2_ids) r ON r.rn = i.rn
-- and now update where condition is false
UPDATE t
SET textval = textval + ' and trigger did not insert to table_2'
FROM table_1 t
WHERE flag = 0