/usr/lib/ghc-doc/hoogle/libghc-hdbc-odbc-doc.txt is in libghc-hdbc-odbc-doc 2.3.1.1-8.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-hdbc-odbc-doc/html/HDBC-odbc.txt