Merge 'trunk' into 'sybase'

Merge 'trunk' into 'sybase'

r6394@hlagh (orig r7145):  robkinyon | 2009-07-30 10:13:21 -0400
Added prefetch caveats
r6395@hlagh (orig r7146):  robkinyon | 2009-07-30 10:20:02 -0400
Fixed caveats
r6398@hlagh (orig r7149):  caelum | 2009-07-30 11:56:01 -0400
make ::Oracle::Generic load without DBD::Oracle
r6399@hlagh (orig r7150):  caelum | 2009-07-30 12:04:47 -0400
make sure DBD::Oracle is loaded when using constants from it
r6404@hlagh (orig r7154):  castaway | 2009-07-30 16:17:33 -0400
Mangled Rob's example somewhat, still needs explaining whch circs exactly cause the borken results

r6405@hlagh (orig r7158):  mo | 2009-07-31 06:51:20 -0400
POD fix
r6406@hlagh (orig r7159):  mo | 2009-07-31 06:52:42 -0400
undo that attributes merge stuff