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POWhat is the fastest way to load an XML file into MySQL using C#?
 

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    <h3>Question</h3> <p>What is the fastest way to dump a large (> 1GB) XML file into a MySQL database?</p> <h3>Data</h3> <p>The data in question is the StackOverflow Creative Commons Data Dump.</p> <h3>Purpose</h3> <p>This will be used in an offline StackOverflow viewer I am building, since I am looking to do some studying/coding in places where I will not have access to the internet.</p> <p>I would like to release this to the rest of the StackOverflow membership for their own use when the project is finished.</p> <h3>Problem</h3> <p>Originally, I was reading from XML/writing to DB one record at a time. This took about 10 hours to run on my machine. The hacktastic code I'm using now throws 500 records into an array, then creates an insertion query to load all 500 at once (eg. "<code>INSERT INTO posts VALUES (...), (...), (...) ... ;</code>"). While this is faster, it still takes hours to run. Clearly this is not the best way to go about it, so I'm hoping the big brains on this site will know of a better way.</p> <h3>Constraints</h3> <ul> <li>I am building the application using C# as a desktop application (i.e. WinForms).</li> <li>I am using MySQL 5.1 as my database. This means that features such as "<code>LOAD XML INFILE filename.xml</code>" are not usable in this project, as this feature is only available in MySQL 5.4 and above. This constraint is largely due to my hope that the project would be useful to people other than myself, and I'd rather not force people to use Beta versions of MySQL.</li> <li>I'd like the data load to be built into my application (i.e. no instructions to "Load the dump into MySQL using 'foo' before running this application.").</li> <li>I'm using MySQL Connector/Net, so anything in the <code>MySql.Data</code> namespace is acceptable.</li> </ul> <p>Thanks for any pointers you can provide!</p> <hr> <p><strong>Ideas so far</strong></p> <blockquote> <p>stored procedure that loads an entire XML file into a column, then parses it using XPath </p> </blockquote> <ul> <li>This didn't work since the file size is subject to the limitations of the max_allowed_packet variable, which is set to 1 MB by default. This is far below the size of the data dump files.</li> </ul>
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    1. COWhy MySQL? If you're building an offline viewer, something like SQLite seems much more fitting. As a bonus, it'll be much, much faster than MySQL.
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    2. COHonestly, Mark, I was under the mistaken impression SQLite was meant for smaller databases. I just took a look at the site and while I did notice a comment that it was not for "Very large datasets," I re-read the comment for that section and noticed just how high the limit really is. Perhaps I'll take a look at it as an alternate database. I've already got plans to allow MSSQL to be used instead.
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