Scripting - Server Side (PHP, Perl, etc.Windows Presentation Foundation (WPF) & XAML forum.The generated query plan doesn't replace a plan stored in cache when the same query runs without the RECOMPILE hint. NET Installation and Configuration Issues Instructs the SQL Server Database Engine to generate a new, temporary plan for the query and immediately discard that plan after the query completes execution. Is there any way to recompile all SPs in the database to avoid timeout errors? I read on WEB that it is possible to include WITH RECOMPILE statement into SP, but I'm afraid to break anything else. I cannot replicate this situation to make sure that recompiling solves the problem. When a procedure is compiled for the first time or recompiled, the procedure's query plan is optimized. Your requirement is like asking how to define a query where the FROM is defined before the SELECT. I do not know what happened to that SP due to my weak knowledg of the database stuff. Recompile a Stored Procedure Before You Begin. As per the syntax documentation the WITH clause, and the procedure options (with includes RECOMPILE ), goes before the AS. I returned both, so restored the original text of SP, compiled, ran the process from VB and got the result very fast, within same 2 seconds. Then compare their performance, both from the client application and in the SQL Server plan cache if you. I uncommented the second Select and commented the first one, compiled - 2 seconds. See different kinds of recompile hints in action. I commented the UNION and following Select, compiled and ran the process - just 2 seconds. I started to look for a way to make SP faster. I set CommandTimeout = 0 to find out how long does it take if not interrupted. Now let’s execute the stored procedure we created with RECOMPILE and then check the plan cache: 1 2 3 4 5 6 7 8 9 10 11 12 EXEC pGetOrderInfo 57302 GO 10 SELECT qs. Resently one of the users set 1 year date range and got timeout error. If we expand the querysqltext column (middle text removed for space reasons) you can see that the text includes OPTION (RECOMPILE). Usually users of VB6 application which uses this SP used to select pretty narrow data range, no more than 1 month. Created using WITH RECOMPILE, the proc will build the plan on each execution without one, it will stick to a single plan (but will save time on recompilation itself). I have SP which is used to select some records with set of filters and UNION. SELECT FROM orders WHERE orderdate BETWEEN beginreport AND fromreport will be a full scan if the date range is large or an index scan if it's small. The OPTION (RECOMPILE) at the end protects you from plans that can vary greatly based on the values of the same parameters from execution to execution (for example, WHERE name LIKE N's' should yield a different plan shape than WHERE name LIKE N'Q' ).
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