参考：
http://blog.csdn.net/haiross/article/details/20612135
Oracle/PLSQL: ORA-06550
Learn the cause and how to resolve the ORA-06550 error message in Oracle.
Description
When you encounter an ORA-06550 error, the following error message will appear:
ORA-06550: line num, column num: str
Cause of Error
You tried to execute an invalid block of PLSQL code (like a stored procedure or function), but a compilation error occurred.
How to Resolve the Error
The option(s) to resolve this Oracle error are:
Option #1
Refer to the line and column numbers (in the error message) to find the compilation error and correct it. Then try recompiling your code.
Let's look at an example of how to resolve an ORA-06550 error. For example, if you created a procedure calledTestProc as follows:
SQL> CREATE OR REPLACE PROCEDURE TestProc
2 AS
3 vnum number;
4 BEGIN
5 vnum := vAnotherNum;
6 END;
7 /
Warning: Procedure created with compilation errors.
This procedure was created with compilation errors. So if we try to execute this procedure, we will get an ORA-06550 error as follows:
SQL> execute TestProc();
BEGIN TestProc(); END;
ERROR at line 1:
ORA-06550: line 1, column 7:
PLS-00905: object EXAMPLE.TESTPROC is invalid
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored
You can run the SHOW ERROR command to view the errors as follows:
SQL> show error procedure TestProc;
Errors for PROCEDURE TESTPROC:
LINE/COL ERROR
5/1 PL/SQL: Statement ignored
5/9 PLS-00201: identifier 'VANOTHERNUM' must be declared
As you can see, the error is caused by the variable called VANOTHERNUM not being declared. To resolve this error, we can modify ourTestProc procedure to declare the variable as follows:
SQL> CREATE OR REPLACE PROCEDURE TestProc
2 AS
3 vnum number;
4 vAnotherNumber number;
5 BEGIN
6 vAnotherNum := 999;
7 vnum := vAnotherNum;
8 END;
9 /
Procedure created.
And now when we execute our TestProc procedure, the ORA-06550 error has been resolved.
SQL> execute TestProc();
PL/SQL procedure successfully completed.