Porting from MySql to T-Sql. Any INET_ATON() equivalent?

Question

Need to move some code from MySql to TSql. I have a couple of calls to INET_ATON which converts a string which resembles an IPAddress into a number. Is there a T-SQL equival

Answer 1

More a different option than a direct answer to your question (I see the downvotes coming ^^), but you could also consider putting the conversion logic into your software instead of the query. Depending on language and use case this might be even better.

Examples

PHP: ip2long("192.168.1.1");

C/C++: inet_addr("192.168.1.1");

C#

System.Net.IPAddress ip;
long ipn = (System.Net.IPAddress.TryParse("192.168.1.1", out ip))

    ? (((long) ip.GetAddressBytes()[0] << 24) | (ip.GetAddressBytes()[1] << 16) |
              (ip.GetAddressBytes()[2] <<  8) |  ip.GetAddressBytes()[3])

    : 0;

You could also give it -1, or null (with long? as datatype), or write a method which throws an exception, in case the conversion fails.

Python

reduce(lambda sum, chunk: sum <<8 | chunk, map(int, '192.168.1.1'.split(".")))

Before you start downvoting: This is just a short example, no error handling here, I know.

Conclusion

Of course it is most of the time nicer to let the dbs do the job, but it really depends, and in case you don' t have a project with millions of requests per second, this might help.