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POSystem.Data.SQLite issue with "IN" clause in query
 

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  1. POSystem.Data.SQLite issue with "IN" clause in query
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    <p>I am working on compact framework and using ADO for sqlite. My sqlite database consist of 3 million records. The table structure is same as explain in <a href="https://stackoverflow.com/questions/14119713/system-data-sqlite-issue-on-compact-framework-3-5">THIS QUESTION</a>. I am trying to use a Data Adapter and Data Set to solve the issue mentioned in same question. However the new issue am facing is, whenever my query contains "IN" clause the data adapter's Fill(...) call does not return. Below is the query and logic I am using for filling data set.</p> <pre><code>string query = SELECT TimeStamp,Col2,Col3,Col4,Col5,Col6 FROM T1 WHERE (TimeStamp BETWEEN @startDate AND @endDate) AND Col5 IN {0} ORDER BY TimeStamp DESC LIMIT 0,@dataToRead </code></pre> <p><strong>Please note 'place holder' after IN clause</strong>. I required because my IN clause list will be created dynamically.</p> <p>I am using the sqlite command and data adapter as follows</p> <pre><code>using (SQLiteCommand cmd = _conn.CreateCommand()) { cmd.Parameters.AddWithValue("@startDate", startDate.Ticks); cmd.Parameters.AddWithValue("@endDate", endDate.Ticks); cmd.Parameters.AddWithValue("@dataToRead", dataToRead); //100 StringBuilder inParams = new StringBuilder(); if (true == webRequest &amp;&amp; webRequestFilter != WebCategory.All) { switch (webRequestFilter) { case WebCategory.One: { inParams.AppendFormat("({0})", (int)SystemCategory.One); break; } case WebCategory.Two: { inParams.AppendFormat("({0},{1},{2})", (int)SystemCategory.Two, (int)SystemCategory.Three, (int)SystemCategory.Four); break; } case WebCategory.Three: { inParams.AppendFormat("({0})", (int)SystemCategory.Five); break; } case WebCategory.Four: { inParams.AppendFormat("({0},{1},{2})", (int)SystemCategory.Six, (int)SystemCategory.Two, (int)SystemCategory.Three); break; } }// End Switch query = string.Format(query, inParams.ToString()); //Append place holder for IN clause }// End If cmd.CommandText = query; DataSet ds = new DataSet(); SQLiteDataAdapter da = new SQLiteDataAdapter(cmd); da.Fill(ds); // This call does not return. } </code></pre> <p>The query works well with Sqlite Shell and same database.</p> <p>Has anyone faced the similar issue with compact framework? </p>
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    1. COcan you post your full code in the using() also what is query please format this so that it leads to no assumptions also where is _conn defined.. it's hard to offer advice when you are piecing out code like this also what do you mean infinite loop are you getting and stackoverflow errors at all..?
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    2. COHi Dj Kraze, Please see the post again. I have removed statement "infinite loop" because it was misleading. Also, the _conn variable is initialized when application is started and kept alive till application ends.
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    3. COafter your da.Fill(ds) clause, are you binding it to anything like a dataGridView for example..? also please show more code for example if you have the @startDate and @endDate.. how are you adding those Parameters.. do you have something like this `cmd.Parameters.AddWithValue(SqlParameter("@startDate", yourStartDateValue));`
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