What's New in Apache Web Server 2.2?

mod_dbd

mod_dbd, while not particularly useful all by itself, provides a mechanism for other modules to use SQL databases in their operation.

mod_authn_dbd, as previously mentioned, is perhaps the most important example to date of how mod_dbd can be used. Other modules are sure to follow which take advantage of the mod_dbd architecture and use database connectivity in their operation.

The current 2.3 development version, for example, includes an extension to the RewriteMap directive, which allows RewriteRules to use SQL queries to determine their targets.