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POSP cache plan not generated
 

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  1. POSP cache plan not generated
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    <p>There is something weird in this statement COALESCE(@param_ids + ',', '')</p> <p>@param_ids are passed in as param and it is @param_ids VARCHAR(MAX)</p> <p>Any idea why the SQL-Server could not able to produce a cache plan for below scenario. This issue has been escalted to Microsoft they are still working on it.</p> <p>Not working scenario - No cache plan is generated Step 1 </p> <p>Alter a SP</p> <pre><code> IF (LTRIM(RTRIM(ISNULL(@param_ids,''))) = '') BEGIN SELECT @param_ids = COALESCE(@param_ids + ',', '') + CONVERT(VARCHAR(50),ID) FROM [dbo].Content_Type WITH (NOLOCK) END </code></pre> <p>Step 2 Exec Sp with params</p> <p>Step 3 (No cache plan)</p> <pre><code>SELECT * FROM sys.dm_exec_cached_plans CROSS APPLY sys.dm_exec_sql_text(plan_handle) WHERE [dbid] = DB_ID('databasename') AND [objectid] = OBJECT_ID('databasename.dbo.us_spname') GO </code></pre> <p>Working scenario - cache plan is generated Step 1 </p> <p>Alter a SP</p> <pre><code> IF (LTRIM(RTRIM(ISNULL(@param_ids,''))) = '') BEGIN --SELECT @param_ids = COALESCE(@param_ids + ',', '') + CONVERT(VARCHAR(50),ID) --FROM [dbo].Content_Type WITH (NOLOCK) SELECT @param_ids = COALESCE('aaaaaaa' + ',', '') + CONVERT(VARCHAR(50),ID) FROM [dbo].Content_Type WITH (NOLOCK) END </code></pre> <p>Step 2 Exec Sp with params</p> <p>Step 3 (cache plan exits)</p> <pre><code>SELECT * FROM sys.dm_exec_cached_plans CROSS APPLY sys.dm_exec_sql_text(plan_handle) WHERE [dbid] = DB_ID('databasename') AND [objectid] = OBJECT_ID('databasename.dbo.us_spname') GO </code></pre> <p>Thankx</p>
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    1. USDannycool
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    1. COWhile I try it on my local I get different dbID and DB_ID('databasename'). Please include DB_ID('databasename'),OBJECT_ID('databasename.dbo.us_spname') in your select statement I think they might be different for both case
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      1. USashish.chotalia
    2. COCan you post the full stored procedure? I can reproduce this, but it seems if the whole procedure is within the if clause it wouldn't need to have a plan (other than return the given @param_ids) if you pass in values.
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      1. USBill N
 

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