savepoint和外部脚本调用问题

下午实验savepoint功能，为什么会报错？具体过程如下
db2 => create table savepoint(id int, name char(10))
    DB20000I The SQL command completed successfully.
    db2 => insert into savepoint values(1,'test1')
    DB20000I The SQL command completed successfully.
    db2 => savepoint savepoint1 on rollback retain cursors
    DB20000I The SQL command completed successfully.
    db2 => insert into savepoint values(2,'savepoint1')
    DB20000I The SQL command completed successfully.
    db2 => savepoint savepoint2 on rollback retain cursors
    DB20000I The SQL command completed successfully.
    db2 => select * from savepoint

    ID NAME
    ----------- ----------
    1 test1
    2 savepoint1

    db2 => rollback to savepoint savepoint1
    DB21034E The command was processed as an SQL statement because it was not a
    valid Command Line Processor command. During SQL processing it returned:
    SQL0880N SAVEPOINT "SAVEPOINT1" does not exist or is invalid in this context.
    SQLSTATE=3B001

还有如何执行外部脚本，在调用外部脚本时报错
$ more  createSQLproc.db2
CREATE PROCEDURE sales_status
(IN quota INTEGER, OUT sql_state CHAR(5))
DYNAMIC RESULT SETS 1
LANGUAGE SQL
BEGIN
  DECLARE SQLSTATE CHAR(5);
  DECLARE rs CURSOR WITH RETURN FOR
  SELECT sales_person, SUM(sales) AS total_sales
    FROM sales
    GROUP BY sales_person
    HAVING SUM(sales) > quota;
  OPEN rs;
  SET sql_state = SQLSTATE;
@
$ db2 connect to sample
   Database Connection Information

Database server        = DB2/LINUX 9.7.5
SQL authorization ID   = DB2INST1
Local database alias   = SAMPLE

[db2inst1@dg2 ~]$ db2 -td@ -vf createSQLproc.db2
CREATE PROCEDURE sales_status (IN quota INTEGER, OUT sql_state CHAR(5)) DYNAMIC RESULT SETS 1 LANGUAGE SQL BEGIN DECLARE SQLSTATE CHAR(5); DECLARE rs CURSOR WITH RETURN FOR SELECT sales_person, SUM(sales) AS total_sales FROM sales GROUP BY sales_person HAVING SUM(sales) > quota; OPEN rs; SET sql_state = SQLSTATE;
DB21034E  The command was processed as an SQL statement because it was not a
valid Command Line Processor command.  During SQL processing it returned:
SQL1024N  A database connection does not exist.  SQLSTATE=08003