/usr/lib/ghc-doc/hoogle/libghc-sql-words-doc.txt is in libghc-sql-words-doc 0.1.4.1-4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-sql-words-doc/html/sql-words.txt