Sql query vs stored procedure in source task of DFT in SSIS

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I have some SSIS packages wherein inside the DFTs the source task contains a sql query to fetch data from a database and then processed and then stored to another table.

But the problem is DFT is taking so much time to pull the rows into the buffer for processing, hence the execution times are going very high. So as an alternative, I kept that complex query into a stored procedure in SQL server and called it from the DFTs OLEDB Source task. To my surprise the DFT which took hours of time to execute now finished processing in matter of minutes !!

Now I am in a dilemma whether to go with stored procedures for all the packages also?? Any ideas which method is the best way to follow(Query or Proc ?). Please suggest. I searched in online to have some concrete explanation supporting which way is better, but I couldn't find any solid answer.

What I have tried:

Tried replacing Query with Stored proc, it showed tremendous improvements in execution time.

Posted 25-Apr-16 2:57am

dinesh42

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Nigam,Ashish 25-Apr-16 9:35am

I think Proc is best way

CHill60 25-Apr-16 9:41am

Why? Give the OP some reason to also think it is the best way

CHill60 25-Apr-16 9:39am

I'm also surprised that you showed such a huge improvement. My own experience was so little difference as to not be noticeable. Historically SPs can cause other problems in Data Flow Tasks

See these links for further information:
Stored Procedure vs direct SQL command in SSIS data flow source - Stack Overflow[^]
Using SQL Server Stored Procedures in SSIS Data Flow Sources - SQLServerCentral[^]

You made no other changes other than putting the SQL into an SP?

dinesh42 30-Aug-16 8:48am

I didn't do any changes, that query is running perfectly for quite some time but recently for the past few days it is behaving like that. Not sure what could be the reason and at the same time there is no much increase in the count of records that underlying tables have !

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