Question:
Previously using Microsoft SQL Server, bulk data insertion was seamlessly executed with the SqlBulkCopy class. How can a similar functionality be achieved in MySQL, considering performance concerns?
Answer:
Avoid Assumptions:
Emphasizing the significance of evidence-based decision-making, the response debunks the assumption that writing a DataTable to a CSV file prior to bulk loading into MySQL would result in poor performance.
MySqlBulkLoader Outperforms:
In a series of tests, the MySqlBulkLoader class significantly outperformed standard MySQL data adapter updates within a transaction, completing the insertion of 100,000 rows in merely 5-6 seconds.
Code Solution:
To utilize the MySqlBulkLoader effectively:
<code class="csharp">// Create a temporary CSV file string tempCsvFileSpec = @"C:\Users\Gord\Desktop\dump.csv"; using (StreamWriter writer = new StreamWriter(tempCsvFileSpec)) { Rfc4180Writer.WriteDataTable(rawData, writer, false); } // Perform bulk loading with MySqlBulkLoader var msbl = new MySqlBulkLoader(conn); msbl.TableName = "testtable"; msbl.FileName = tempCsvFileSpec; msbl.FieldTerminator = ","; msbl.FieldQuotationCharacter = '"'; msbl.Load(); // Cleanup System.IO.File.Delete(tempCsvFileSpec);</code>
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