求助：存储过程问题

如一个简单的存储过程：
CREATE OR REPLACE PROCEDURE DAP_PROCEDURE11
( AS_YEAR CHAR, AS_MONTH CHAR )
AS
ls_year CHAR(4);
ls_month CHAR(2);
BEGIN
ls_year := AS_YEAR;
ls_month := AS_MONTH;
END

错误提示：

Compilation errors for PROCEDURE PSI.DAP_PROCEDURE11

Error: PLS-00103: 出现符号 ‘”’在需要下列之一时：
( ; is with authid as cluster
compress order using compiled wrapped external deterministic
parallel_enable pipelined
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Line: 1
Text: CREATE OR REPLACE PROCEDURE DAP_PROCEDURE11

Error: PLS-00103:出现符号 ‘”’在需要下列之一时：
; is with authid as cluster
order using external deterministic parallel_enable pipelined
Line: 2
Text: ( AS_YEAR CHAR, AS_MONTH CHAR )