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

Calculating dependencies ... done!
Dependency resolution took 1.02 s (backtrack: 0/20).

[ebuild  N     ] sys-libs/db-6.0.35-r5:6.0::gentoo  USE="-cxx -doc -examples -tcl -test" 35677 KiB
[ebuild  N     ] dev-perl/common-sense-3.750.0::gentoo  PERL_FEATURES="ithreads (-debug) -quadmath" 14 KiB
[ebuild  N     ] dev-perl/BDB-1.920.0-r1::gentoo  USE="-examples" PERL_FEATURES="ithreads (-debug) -quadmath" 38 KiB

Total: 3 packages (3 new), Size of downloads: 35728 KiB