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POdatetime conversion on sql server stopped working
 

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  1. POdatetime conversion on sql server stopped working
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    <p>I am puzzled by an error that came out of the blue yesterday on my production server. I am doing a LINQ2SQL query such as:</p> <pre><code>var mis = from m in dtcx.valori join p in dtcx.TEPARAMs on m.PARAMCD equals p.PARAMCD where blah blah blah select new { dataRilevazione = m.dataRilevazione, id =m.data&gt;=new DateTime(2010,02,26)&amp;&amp;m.X==3&amp;&amp;m.Y==69?100: m.id, blah blha }; </code></pre> <p>this converts into SQL query which has the condition:</p> <pre><code>N'SELECT [t0].[dataRilevazione], (CASE WHEN ([t0].[data] &gt;= @p6) AND ([t0].[X] = @p7) AND ([t0].[Y] = @p8) THEN @p9 </code></pre> <p>with </p> <p><code>@p6='2010-02-26 00:00:00'</code></p> <p>this has worked like a charm for ages, since two days ago when it stopped working saying that there was a wrong conversion from varchar to datetime.</p> <p>as a matter of fact the problem is that 2010-02-26 00:00:00 is no more converted to a date! if I try </p> <p>print </p> <pre><code>convert(datetime,'2010-02-26 00:00:00' ) </code></pre> <p>I get the same error, which disappears using </p> <pre><code>convert(datetime,'2010-02-26 00:00:00', datetime) </code></pre> <p>since when all worked I did not change the user, nor its locale, nor anything that I am aware of.</p> <p>what can I do? thanks</p> <p><em><strong>UPDATE:</em></strong> profiling SQL Server, linq 2 sql seems to set the correct language:</p> <pre><code>-- network protocol: TCP/IP set quoted_identifier on set arithabort off set numeric_roundabort off set ansi_warnings on set ansi_padding on set ansi_nulls on set concat_null_yields_null on set cursor_close_on_commit off set implicit_transactions off set language us_english set dateformat mdy set datefirst 7 set transaction isolation level read committed </code></pre> <p><strong>so the language is set to us_english!</strong> Why the conversion still fails is beyond me! Every idea is appreciated...</p>
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    1. COWhat does `SELECT @@LANGUAGE` return? Also (this might be a typo on your behalf) in SQL Server `CONVERT ('2010-02-26 00:00:00', datetime)` will always error as this is syntactically incorrecr. You need to swap the datatype and value over (i.e., `CONVERT (datetime, '2010-02-26 00:00:00')`).
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      1. USChris J
    2. CODid you set p6 parameter to datetime like DECLARE @p6 datetime?
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    3. COchris, my typo el ninho, I have no control on the SQL side since it is generated by linq2sql
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