/usr/lib/ghc-doc/hoogle/libghc-hdbc-session-doc.txt is in libghc-hdbc-session-doc 0.1.1.0-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-hdbc-session-doc/html/HDBC-session.txt