Some tips and methods for debugging stored procedures in Oracle

Oracle stored procedures are precompiled database objects that can be executed repeatedly. In order to optimize database performance and save time, many developers will use stored procedures. But when an error occurs in a stored procedure, debugging can become tricky. This article will introduce some tips and methods for debugging stored procedures in Oracle.

1. Set the stored procedure debugging flag

In order to start debugging the stored procedure, you first need to set the debugging flag in the code. Oracle provides a package called DBMS_DEBUG in which debugging flags are set. The specific method is:

1. Connect to Oracle database:

sqlplus / as sysdba

2. Create DBMS_DEBUG package:

SQL> @%ORACLE_HOME%\RDBMS\admin\dbmsdbg.sql

3. Switch to the owner of the stored procedure that needs to be debugged:

SQL> CONNECT myuser ;

4. Start debugging mode:

SQL> EXECUTE DBMS_DEBUG_JDWP.CONNECT_TCP('localhost', '4000');

where localhost is the host name , 4000 is the Java debugging port.

5. Set the debug flag and start debugging:

SQL> EXECUTE DBMS_DEBUG_JDWP.SET_BREAKPOINT('schema.package.procedure', 'procedure',1);

Where schema is the schema where the stored procedure is located, package is the package where the stored procedure is located, procedure is the name of the stored procedure, and 1 is the line number where debugging needs to be set.

2. Remote debugging of stored procedures

Before remote debugging of stored procedures, you need to first set up a Java debugger locally (such as Eclipse or IntelliJ IDEA). Then follow these steps to set the remote debugging flag in Oracle:

1. Start the stored procedure in Oracle
2. Start debugging mode in the local Java debugger
3. In Oracle Connect to the local Java debugger in the DBMS_DEBUG package:

SQL> EXECUTE DBMS_DEBUG_JDWP.CONNECT_TCP('localhost','4000′);

4. In the DBMS_DEBUG package Set a breakpoint during the SET_BREAKPOINT process:

SQL> EXECUTE DBMS_DEBUG_JDWP.SET_BREAKPOINT('schema.package.procedure', 'procedure',1);

5. In local Java Start the debugging mode in the debugger
6. End the remote debugging mode in the DBMS_DEBUG package that notifies Oracle:

SQL> EXECUTE DBMS_DEBUG_JDWP.DISCONNECT;

3. Use debugging Debugger

In addition to manually setting the debugging flags, you can also use the debugger in Oracle. The debugger simplifies the debugging process and makes it more intuitive.

1. Open PL/SQL Developer
2. Open the source code of the stored procedure that needs to be debugged
3. Right-click on the line that needs to be debugged and select "Toggle Breakpoint ” to set breakpoints
4. Click “Tools” -> “Debug” -> “Compile as Debug”
5. Click “Debug” -> “Start Debugging”
6. Run operations that need to be debugged before the stored procedure is called
7. When the stored procedure reaches a breakpoint, the debugger will automatically interrupt the running of the stored procedure
8. You can use debugging Use the controls in the browser to step through debugging, view variables, etc.
9. After debugging is completed, click "Debug" -> "Stop Debugging" to end debugging

4. Usage logs Or debugging options

Using log or debugging options in the stored procedure, you can easily trace the execution flow and data of the stored procedure. You can use the DBMS_OUTPUT package to output messages in a stored procedure or use debugging options.

DBMS_OUTPUT:

Use the DBMS_OUTPUT package in a stored procedure to display messages during the execution of the stored procedure. The code example is as follows:

CREATE OR REPLACE PROCEDURE my_procedure IS
BEGIN
DBMS_OUTPUT.PUT_LINE('Hello World!');
END;

Debugging options:

Debugging options are set using the PRAGMA statement in the stored procedure. The code example is as follows:

CREATE OR REPLACE PROCEDURE my_procedure IS
v_debug BOOLEAN := TRUE;
v_message VARCHAR2(100);
BEGIN
IF v_debug THEN

v_message := 'Starting my_procedure';
DBMS_OUTPUT.PUT_LINE(v_message);

END IF;
...
END;

The above are some tips and methods for debugging stored procedures in Oracle. Using these methods, you can debug stored procedures more efficiently and make them run faster. If you need to deal with stored procedures in Oracle for a long time, it is highly recommended that you master these techniques.

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