The parameter types of oracle stored procedures are: 1. Input type, which means the caller passes the value to the process; 2. Output type, which means the process passes the value to the caller (can return multiple values); 3 , input and output types, which not only means that the caller passes in values to the process, but also means that the process passes values to the caller.
The operating environment of this tutorial: Windows 7 system, Oracle 11g version, Dell G3 computer.
Parameter type of oracle stored procedure
1. in: input type, that is, the data is transmitted by the application program Into the Oracle stored procedure, it means that the caller passes the value to the procedure; this parameter is aread-only parameterin the stored procedure, and this type of parameter cannot be modified in the stored procedure;
2. out: Output type, indicating that the process passes the value to the caller.
3. In out: Input and output type, which has both the above characteristics, but is readable and writable; it means that the caller passes a value to the process, and it means that the process passes a value to the caller.
Verify input parameters:
Since the default parameters are of input type, in the above figure, an error is reported when assigning a value to the BAcount parameter.
Solution:
CREATE OR REPLACE PACKAGE body BAWQ_PROC_JGZX IS PROCEDURE PROC_CSJGZX ( pproc VARCHAR2, BAcount int :=3 ) IS i int :=BAcount; --定义变量，通过变量替代参数 BEGIN i:=BAcount; dbms_output.put_line(i); delete CSJGZX; while i>0 LOOP i := i-1 ; insert into CSJGZX (CSJGZX_PROC,id,bh,mc,data) values(pproc,SYS_GUID(),SYS_GUID(),'济南',cast(DBMS_RANDOM.VALUE(1,200) as int)); commit; end loop; END PROC_CSJGZX; END BAWQ_PROC_JGZX;
Simply put, in is the message passed to the stored procedure when the stored procedure is called. out is the message sent by the stored procedure to the caller. in out means communication between the two.
Recommended tutorial: "Oracle Tutorial"
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