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POAlternative to use cursors in SQL Server stored procedure
 

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  1. POAlternative to use cursors in SQL Server stored procedure
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    <p>It's not like that I am having trouble executing my cursors which are enclosed in a stored procedure. But I want to find more efficient way to achieve the same.</p> <p>Here it goes.</p> <p>Stored procedure : <code>RawFeed.sql</code> (runs every 5 minutes)</p> <pre><code>Set @GetATM = Cursor For Select DeviceCode,ReceivedOn From RawStatusFeed Where CRWR=2 AND Processed=0 Order By ReceivedOn Desc Open @GetATM Fetch Next From @GetATM Into @ATM,@ReceivedOn While @@FETCH_STATUS = 0 Begin Set @RawFeed=@ATM+' '+Convert(VarChar,@ReceivedOn,121)+' '+'002307'+' '+@ATM+' : Card Reader/Writer - FAULTY ' Exec usp_pushRawDataAndProcess 1,@RawFeed Fetch Next From @GetATM Into @ATM,@ReceivedOn End Set @GetATM = Cursor For Select DeviceCode,ReceivedOn From RawStatusFeed Where CRWR=0 AND Processed=0 Order By ReceivedOn Desc Open @GetATM Fetch Next From @GetATM Into @ATM,@ReceivedOn While @@FETCH_STATUS = 0 Begin Set @RawFeed=@ATM+' '+Convert(Varchar,@ReceivedOn,121)+' '+'002222'+' '+@ATM+' : Card Reader/Writer - OK ' Exec usp_pushRawDataAndProcess 1,@RawFeed Fetch Next From @GetATM Into @ATM,@ReceivedOn End </code></pre> <p>Likewise I have 10 more <code>SET</code> statements which differ on <code>WHERE</code> condition parameter &amp; string enclosed in <code>@RawFeed</code> variable.</p> <p>For each row I get I execute another stored procedure on that particular row.</p> <p>My question is </p> <blockquote> <p><em>Is there any better way to achieve the same without using cursors?</em></p> </blockquote> <p>Variable @<code>RawFeed</code> Contains following <code>string</code> which is input to <code>usp_pushRawDataAndProcess</code> stored procedure. now this will divide whole string and do some operation like <code>INSERT,UPDATE,DELETE</code> on some tables.</p> <p>WE JUST CAN NOT PROCESS MORE THAN 1 STRING IN <code>usp_pushRawDataAndProcess</code> </p> <pre><code>NMAAO226 2012-09-22 16:10:06.123 002073 NMAAO226 : Journal Printer - OK WMUAO485 2012-09-22 16:10:06.123 002222 WMUAO485 : Card Reader/Writer - OK </code></pre>
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    1. COTautologically, any way that doesn't use cursors is better.
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    2. COThe answer rather depends on what `usp_pushRawDataAndProcess` does. What does it do?
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    3. COusp_pushRawDataAndProcess gets a long string it divide that string and depending on value present in that sub string it INSERT,UPDATE,DELETE records in few tables in DB.
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