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POUsing Linq to Entity in retrieving rows from huge database
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  1. POUsing Linq to Entity in retrieving rows from huge database
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    copied!<p>I have the DB that contains billions of rows. I created function that recieve from user number of parameters and cut the DB by those parameters. This works well for me with small DB(30000 rows), but when I try to use this function on big DB i got TIMEOUTEXCEPTION from SQLSERVER.</p> <p>Here is my code:</p> <pre><code> public static IQueryable&lt;LogViewer.EF.InternetEF.Log&gt; ExecuteInternetGetLogsQuery(FilterCriteria p_Criteria, ref GridView p_Datagrid) { IQueryable&lt;LogViewer.EF.InternetEF.Log&gt; internetQuery = null; using (InternetDBConnectionString context = new InternetDBConnectionString()) { internetQuery = context.Logs; if ((p_Criteria.DateTo != null &amp;&amp; p_Criteria.DateFrom != null)) { internetQuery = internetQuery.Where(c =&gt; c.Timestamp &gt;= p_Criteria.DateFrom &amp;&amp; c.Timestamp &lt; p_Criteria.DateTo); } else if (p_Criteria.DateFrom != null &amp;&amp; p_Criteria.DateFrom &gt; DateTime.MinValue) { internetQuery = internetQuery.Where(c =&gt; c.Timestamp &gt;= p_Criteria.DateFrom); } else if (p_Criteria.DateTo != null &amp;&amp; p_Criteria.DateTo &gt; DateTime.MinValue) { internetQuery = internetQuery.Where(c =&gt; c.Timestamp &lt; p_Criteria.DateTo); } if (!string.IsNullOrEmpty(p_Criteria.FreeText)) { internetQuery = internetQuery.Where(c =&gt; c.FormattedMessage.Contains(p_Criteria.FreeText)); } if (p_Criteria.Titles.Count &gt; 0) { internetQuery = internetQuery.AsEnumerable().Where(c =&gt; p_Criteria.Titles.Contains(c.Title)).AsQueryable(); } if (p_Criteria.MachineNames.Count &gt; 0) { internetQuery = internetQuery.AsEnumerable().Where(c =&gt; p_Criteria.MachineNames.Contains(c.MachineName)).AsQueryable(); } if (p_Criteria.Severities.Count &gt; 0) { internetQuery = internetQuery.AsEnumerable().Where(c =&gt; p_Criteria.Severities.Contains(c.Severity)).AsQueryable(); } internetQuery= internetQuery.OrderByDescending(c=&gt;c.LogID); if (internetQuery.Count() &gt; p_Criteria.TopValue) { internetQuery = internetQuery.Take(p_Criteria.TopValue); } p_Datagrid.DataSource = internetQuery; p_Datagrid.DataBind(); return internetQuery; } } </code></pre> <p>My version of SQL is 2005. I got an exception on <code>p_Datagrid.DataBind();</code> row.</p> <p>Any suggetions? Thanks</p>
 

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