当我通过应用程序执行存储过程时，SQL Server抛出超时，但是当我在Management Studio中执行存储过程时，SQL Server没有抛出超时

Question

I have a stored procedure that is something like this:

PROCEDURE [dbo].[myStoredProcedure]
 @period varchar(7),
 @pgSize int,
 @pg int,
 @sort varchar(50)
AS
BEGIN
    DECLARE @exec nvarchar(1000)
    DECLARE @order varchar(100)
    DECLARE @where varchar(100)

    CREATE TABLE #temp (
        fieldOne varchar(7),
        fieldTwo varchar(7),
        fieldThree int,
        fieldFour varchar(7)
    )   

    If exists(select 1 from tableA Where date = @period)
    Begin
        INSERT INTO #temp
        SELECT DISTINCT a.fieldOne, b.fieldTwo, td.fieldThree, b.fieldFour
        FROM tableA a
        LEFT JOIN docType td ON td.code = a.docType
        INNER JOIN tableB b ON a.code = b.code
        AND b.state= 'A'
        AND a.date = convert(int, @period);
    END
    ELSE
    BEGIN
        INSERT INTO #temp
        SELECT DISTINCT a.fieldOne, b.fieldTwo, td.fieldThree, b.fieldFour
        FROM tableAHistoric a
        LEFT JOIN docType td ON td.code = a.docType
        INNER JOIN tableBHistoric b ON a.code = b.code
        AND b.state= 'A'
        AND a.date = convert(int, @period);
    END

    -- Eliminate registers such that there is another register with the same fieldOne but different fieldTwo, and keep the one that has smaller fieldThree or,
    -- in case they are equal, keep the one with smallest fieldFour
    DELETE t1
    FROM #temp t1
    INNER JOIN #temp t2 ON t1.fieldOne = t2.fieldOne AND t1.fieldTwo <> t2.fieldTwo
    WHERE t1.fieldThree > t2.fieldThree OR (t1.fieldThree = t2.fieldThree AND t1.fieldFour > t2.fieldFour)

    SET @order = ' order by ' + CASE LEFT(@sort, 1) WHEN '-' THEN SUBSTRING(@sort, 2, LEN(@sort) - 1) + ' desc' ELSE @sort END 

    IF @pg = 1
    BEGIN
        SET @exec = CONCAT(
                'select * from #temp ', 
                @order, 
                ' offset (@pg-1) * @pgSize rows  fetch next @pgSize rows only '
                )

        EXEC sp_executesql @exec, N'@pg int, @pgSize int', @pg = @pg, @pgSize = @pgSize
        SELECT rows = COUNT(*) FROM #temp
    END
    ELSE
    BEGIN
        SET @exec = CONCAT(
                'select * from #temp ', 
                @order, 
                ' offset (@pg-1) * @pgSize rows  fetch next @pgSize rows only '
                )
        EXECUTE sp_executesql @exec, N'@pg int, @pgSize int', @pg = @pg, @pgSize = @pgSize
    END 

If I query this from SQL Server Management Studio with the following parameters:

EXEC myStoredProcedure '201603', 10, 1, 'fieldOne'

It returns within a second.

If I hardcode '201603' in the variable @period and execute the stored procedure from my Node.js application, it returns within a second as well.

However, if I pass that parameter while executing the stored procedure through the Node.js application, I get a timeout. I've registered that the stored procedure either never gets to execute the INSERT or never finishes before a timeout. The timeout is set in 15 seconds, and I've set it to 2 minutes to test, but the results are the same: timeout. What's funny is that it happens only for that value: '201603'. The result should return 889 registers. I've tested it with other values that return 200 results, and they have no problem.

For reference, the field date is an integer. But even if I convert the parameter @period in the WHERE clause, nothing changes.

What could be the problem? What should I look into?

Thanks.

Answer 1

It could be a cached execution plan.

Try adding "OPTION (RECOMPILE)" at the bottom of your SP