This file is indexed.

prerm is in postgresql-filedump 9.0.0-1.

This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.

The actual contents of the file can be viewed below.

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#!/bin/sh

set -e

case "$1" in
    remove|deconfigure)
            update-alternatives --quiet --remove pg_filedump /usr/lib/postgresql/8.4/bin/pg_filedump
	    ;;
    *)
esac