{{{
    // UserDetailsManager SQL
    public static final String DEF_CREATE_USER_SQL =
            "insert into users (username, password, enabled) values (?,?,?)";
    public static final String DEF_DELETE_USER_SQL =
            "delete from users where username = ?";
    public static final String DEF_UPDATE_USER_SQL =
            "update users set password = ?, enabled = ? where username = ?";
    public static final String DEF_INSERT_AUTHORITY_SQL =
            "insert into authorities (username, authority) values (?,?)";
    public static final String DEF_DELETE_USER_AUTHORITIES_SQL =
            "delete from authorities where username = ?";
    public static final String DEF_USER_EXISTS_SQL =
            "select username from users where username = ?";
    public static final String DEF_CHANGE_PASSWORD_SQL =
            "update users set password = ? where username = ?";

    // GroupManager SQL
    public static final String DEF_FIND_GROUPS_SQL =
            "select group_name from groups";
    public static final String DEF_FIND_USERS_IN_GROUP_SQL =
            "select username from group_members gm, groups g " +
            "where gm.group_id = g.id" +
            " and g.group_name = ?";
    public static final String DEF_INSERT_GROUP_SQL =
            "insert into groups (group_name) values (?)";
    public static final String DEF_FIND_GROUP_ID_SQL =
            "select id from groups where group_name = ?";
    public static final String DEF_INSERT_GROUP_AUTHORITY_SQL =
            "insert into group_authorities (group_id, authority) values (?,?)";
    public static final String DEF_DELETE_GROUP_SQL =
            "delete from groups where id = ?";
    public static final String DEF_DELETE_GROUP_AUTHORITIES_SQL =
            "delete from group_authorities where group_id = ?";
    public static final String DEF_DELETE_GROUP_MEMBERS_SQL =
            "delete from group_members where group_id = ?";
    public static final String DEF_RENAME_GROUP_SQL =
            "update groups set group_name = ? where group_name = ?";
    public static final String DEF_INSERT_GROUP_MEMBER_SQL =
            "insert into group_members (group_id, username) values (?,?)";
    public static final String DEF_DELETE_GROUP_MEMBER_SQL =
            "delete from group_members where group_id = ? and username = ?";
    public static final String DEF_GROUP_AUTHORITIES_QUERY_SQL =
            "select g.id, g.group_name, ga.authority " +
            "from groups g, group_authorities ga " +
            "where g.group_name = ? " +
            "and g.id = ga.group_id ";
    public static final String DEF_DELETE_GROUP_AUTHORITY_SQL =
            "delete from group_authorities where group_id = ? and authority = ?";
}}}