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POEF 4.0 Linq generates weird query when using string.contains with a variable instead of hard coded string
 

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  1. POEF 4.0 Linq generates weird query when using string.contains with a variable instead of hard coded string
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    <p>When I'm using the following code block(C#):</p> <pre><code>var query = context.Set.Where(o =&gt; o.Email.Contains("Mail@gmail.com")); var stringQuery = ((System.Data.Objects.ObjectQuery)query).ToTraceString(); </code></pre> <p>linq generates the following query:</p> <pre><code>SELECT * FROM [SET] AS [Extent1] WHERE [Extent1].[Email] LIKE '%Mail@gmail.com%' </code></pre> <p>When I'm using the following code block:</p> <pre><code>string email = "Mail@gmail.com"; var query = context.Set.Where(o =&gt; o.Email.Contains(email)); var stringQuery = ((System.Data.Objects.ObjectQuery)query).ToTraceString(); </code></pre> <p>linq generates the following query:</p> <pre><code>SELECT * FROM [Set] AS [Extent1] WHERE [Extent1].[Email] LIKE @p__linq__0 ESCAPE N'~' </code></pre> <p>How can I get linq to generate the query like in the first case without having the string hardcoded, and instead passed as a string parameter?</p>
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    1. USChad Ferguson
    1. USuser1531186
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    1. COwhy do you want this? it seems perfectly fine to me
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      1. POEF 4.0 Linq generates weird query when using string.contains with a variable instead of hard coded string
      1. USGerrie Schenck
    2. COthe performance of the first query in the DB is way better than the second one.
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    3. COI'm also experiencing the huge performance difference. Its about 1:5 for me
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      1. USadentum
 

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