Chapter -09 Creating Procedures 04

Exceptions Not Handled

Calling Path

Some Procedures Demo

可参考脚本:192.168.1.200

[oracle@DG1 scripts]$ pwd
/u01/oracle/scripts
[oracle@DG1 scripts]$ ll
total 60
-rw-r--r-- 1 oracle oinstall 886 Apr 19 15:35 call_calculate_blance.sql
-rw-r--r-- 1 oracle oinstall 220 Apr 19 14:26 s09_01.sql
-rw-r--r-- 1 oracle oinstall 205 Apr 19 14:38 s9_2_call.sql
-rw-r--r-- 1 oracle oinstall 247 Apr 19 14:36 s9_2.sql
-rw-r--r-- 1 oracle oinstall 138 Apr 19 15:37 s9_3_call_01.sql
-rw-r--r-- 1 oracle oinstall 185 Apr 19 14:46 s9_3_call.sql
-rw-r--r-- 1 oracle oinstall 233 Apr 19 14:48 s9_3.sql
-rw-r--r-- 1 oracle oinstall 256 Apr 19 17:15 s9_4.sql
-rw-r--r-- 1 oracle oinstall 297 Apr 19 21:24 s9_5.sql
-rw-r--r-- 1 oracle oinstall 222 Apr 19 21:27 s9_6.sql
-rw-r--r-- 1 oracle oinstall 198 Apr 19 21:52 s9_7.sql
-rw-r--r-- 1 oracle oinstall 615 Apr 19 22:30 s9_8.sql
-rw-r--r-- 1 oracle oinstall 817 Apr 20 12:48 s9_9_01.sql
-rw-r--r-- 1 oracle oinstall 688 Apr 20 13:03 s9_9_02.sql
-rw-r--r-- 1 oracle oinstall 713 Apr 20 12:43 s9_9.sql

Removing Procedures:Using the DROP SQL Statement

Using the DROP statement:

DROP PROCEDURE raise_salary;

Viewing Procedure Information Using the Data Dictionary Views

SQL> desc user_source;
Name                                      Null?    Type
----------------------------------------- -------- ----------------------------
NAME                                               VARCHAR2(30)
TYPE                                               VARCHAR2(12)
LINE                                               NUMBER
TEXT                                               VARCHAR2(4000)
SQL> SELECT text FROM user_source WHERE name = 'RAISE_SALARY' AND TYPE = 'PROCEDURE' ORDER BY line;

TEXT
--------------------------------------------------------------------------------
PROCEDURE raise_salary
(
p_id            IN emp.employee_id%TYPE,
p_percent       IN NUMBER

)
IS
BEGIN
UPDATE emp
SET salary = salary * (1 + p_percent/100)
WHERE employee_id = p_id;
END raise_salary;

11 rows selected.

Summary

In this lesson,you should have learned how to:

Identify the benefits of modularized and layered subprogram design.

Create and call procedures

Use formal and actual parameters

Use positional,named,or mixed notation for passing parameters.

Identify the available parameter-passing modes.

Handle exceptions in procedures

Remove a procedure

Display the procedure`s information.