These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.01 s (backtrack: 0/20).

[ebuild  N     ] dev-db/libdbi-0.9.0::gentoo  USE="-doc -static-libs" 1167 KiB
[ebuild  N     ] dev-db/libdbi-drivers-0.9.0-r3::gentoo  USE="sqlite -doc -mysql -oci8 -postgres -static-libs" 1787 KiB

Total: 2 packages (2 new), Size of downloads: 2954 KiB