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Should I use option recompile?
Use of OPTION(RECOMPILE) generally will lead to optimal plan choice and will provide different (and generally correct) cardinality estimation at every query execution, base every time on the value(s) of parameteres provided.
What does Option recompile do in SQL Server?
RECOMPILE – specifies that after the query is executed, its query execution plan stored in cache is removed from cache. When the same query is executed again, there will be no existing plan in cache, so the query will have to be recompiled.
Does dynamic SQL affect performance?
Dynamic SQL is a very reasonable solution. In fact, it can prevent some performance problems that arise when SQL statements are optimized the first time a procedure is run. This can result in sub-optimal execution plans for other parameters.
What is parameter sniffing?
Parameter Sniffing is the process of looking to the first passed parameters values when compiling the stored procedure in order to create an optimal execution plan that fits these parameters values and use it for all values.
Which is better inline query or stored procedure?
every query is submited it will be compiled & then executed. where as stored procedure is compiled when it is submitted for the first time & this compiled content is stored in something called procedure cache,for subsequent calls no compilation,just execution & hence better performance than query.
When should you use dynamic SQL?
You should use dynamic SQL in cases where static SQL does not support the operation you want to perform, or in cases where you do not know the exact SQL statements that must be executed by a PL/SQL procedure. These SQL statements may depend on user input, or they may depend on processing work done by the program.
Is Dynamic SQL bad practice?
It is more of a recommendation not to use it as yes it can lead to a SQL injection if your input is not sanitized, and yes using dynamic SQL in modules that get called often can be detrimental to it’s performance.
When to use option ( recompile ) in dynamic SQL?
There are times that using OPTION (RECOMPILE) makes sense. In my experience the only time this is a viable option is when you are using dynamic SQL. Before you explore whether this makes sense in your situation I would recommend rebuilding your statistics. This can be done by running the following:
When to use option ( recompile ) or SP?
In such a situation you can tell the SQL statement to use the option OPTION (RECOMPILE) or an SP to use WITH RECOMPILE. To tell the Engine this is a “Single Use Plan” and not to use a Cached Plan which likely does not apply.
How to enable recompile in SQL Server management studio?
First, let us create a stored procedure that contains the keyword OPTION (RECOMPILE). Now enable the execution plan for your query window in SQL Server Management Studio (SSMS).
When to recompile a stored procedure in SQL Server?
This is a great adjustment and SQL Server makes every single time when the stored procedure is executed. Of course, there is an additional cost associated when this stored procedure has been executed every single time as it has to recompile.