The new release of SpiraTest, SpiraPlan and SpiraTeam 4.0 includes the ability to write custom reports against various reportable entities. This articles provides a list of the available entities.
This article is now obsolete.
Currently Spira has a number of views available that helps to create powerful custom reports using ESQL queries. Each available table is listed with all of their exact field names. In our documentation you can find a full list of available custom report tables.