LOG4PLSQL is an open source tool that uses PL/SQL framework to log into PL/SQL code package,function,web application,procedure, trigger and various oracle tools such as reports,forms etc.
Logging is very important part of development life cycle for any process or application. These logs are important for tracing functional events,data and operations.Logs are also used for code debugging and in testing or maintenance phase to understand unforeseen events such as system crash,quit or launch.It is considered as a very time-consuming tedious job as all the logs during the development strategy have to be considered which utilizes vital computer memory or resources.
One common logging requirement that many developer wish – is to log both INCOMING & OUTGOING parameter values in a sub program.
--Base Table
SQL> SELECT * FROM emp;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
---------- ---------- --------- ---------- --------- ---------- ---------- ----------
7839 KING PRESIDENT 17-NOV-81 5000 10
7698 BLAKE MANAGER 7839 01-MAY-81 2850 30
7782 CLARK MANAGER 7839 09-JUN-81 2450 10
7566 JONES MANAGER 7839 02-APR-81 2975 20
7788 SCOTT ANALYST 7566 19-APR-87 3000 20
7902 FORD ANALYST 7566 03-DEC-81 3000 20
7369 SMITH CLERK 7902 17-DEC-80 800 20
7499 ALLEN SALESMAN 7698 20-FEB-81 1600 300 30
7521 WARD SALESMAN 7698 22-FEB-81 1250 500 30
7654 MARTIN SALESMAN 7698 28-SEP-81 1250 1400 30
7844 TURNER SALESMAN 7698 08-SEP-81 1500 0 30
7876 ADAMS CLERK 7788 23-MAY-87 1100 20
7900 JAMES CLERK 7698 03-DEC-81 950 30
7934 MILLER CLERK 7782 23-JAN-82 1300 10
14 rows selected.PROCEDURE
SQL> CREATE OR REPLACE PROCEDURE course.log4plsql_proc_param_1 (p_empno course.emp.empno%TYPE,p_sal OUT course.emp.sal%TYPE)
2 IS
3 pctx LOGGER.PLOGPARAM.LOG_CTX := LOGGER.PLOG.INIT(plevel => LOGGER.PLOG.LDEBUG);
4 BEGIN
5 LOGGER.PLOG.INFO (pctx,'EMPNO Passed - '||p_empno);
6
7 SELECT sal
8 INTO p_sal
9 FROM course.emp
10 WHERE empno = p_empno;
11
12 LOGGER.PLOG.INFO (pctx,'SAL Retrieved - '||p_sal);
13 END;
14 /
Procedure created.
SQL> DECLARE
2 nsal course.emp.sal%TYPE;
3 nempno course.emp.empno%TYPE;
4 BEGIN
5 nempno := 7839;
6
7 course.log4plsql_proc_param_1(nempno,nsal);
8
9 DBMS_OUTPUT.PUT_LINE('SAL Displayed In DBMS_OUTPUT Interface ::: '||nsal);
10 END;
11 /
--OUTPUT :::
SAL Displayed In DBMS_OUTPUT Interface ::: 5000
FUNCTION
SQL> CREATE OR REPLACE FUNCTION course.log4plsql_func_param_1 (p_empno course.emp.empno%TYPE)
2 RETURN NUMBER
3 IS
4 pctx LOGGER.PLOGPARAM.LOG_CTX := LOGGER.PLOG.INIT(plevel => LOGGER.PLOG.LDEBUG);
5 nsal course.emp.sal%TYPE;
6 BEGIN
7 LOGGER.PLOG.INFO (pctx,'EMPNO Passed - '||p_empno);
8
9 SELECT sal
10 INTO nsal
11 FROM course.emp
12 WHERE empno = p_empno;
13
14 LOGGER.PLOG.INFO (pctx,'SAL Retrieved - '||nsal);
15
16 RETURN nsal;
17 END;
18 /
Function created.
SQL> SELECT course.log4plsql_func_param_1(7839) result FROM dual;
RESULT
----------
5000
