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A funny recipe.

According to a recent book about MySQL, this is the recipe to convert an IP address into an integer, with the purpose of using it as server-ID.

  1. Take for example
  2. Using a calculator (!!!), convert each of the four numbers to hexadecimal (you get 0a.00.9f.16)
  3. Then glue the four hexadecimal numbers together, after removing the dots, and, again with the calculator, convert them to decimal (0a009f16HEX=167812886DEC)
  4. Use this number (167812886) as your server ID in the options file.

Brilliant, eh?

Had the authors searched the MySQL manual for "IP address", they would have found the INET_ATON function, which can be used like this:

select inet_aton(''); …
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