The alias He-Man would use to work with PostgreSQL. Comes with autocompletion.

postgrayskull.bash

#!/bin/bash
# What if He-Man used Postgres?

_he_man_autocomplete() {
    COMPREPLY=("the Power of postGRESQL...")
    return 0
}

By() {
    if [[ $EUID -ne 0 ]]; then
        echo ":-(" 1>&2
        return 0
    fi
    if [[ $@ == "the Power of postGRESQL..." ]]; then
        echo "I have the Power!!"
        psql -U postgres
    fi
}

complete -F _he_man_autocomplete By