Table behaving unexpectedly..

Question

Hi,
i have one table in which details of employees intime and outime is stored. At the starting of the month records of all employee's are created at starting of month and everyday as their intime and outtime comes this table gets updated.
The problem i am getting is that when there is a outime the attendance code is calculated through the procedure and it is getting updated. In this update query i am updating 6 fields but sometime 4 fields gets updated while the two fields dont get updated. This happens for random employee and doesnt happen for any particular pattern.
And Recently(Two days before) i found something more interesting.
On 24-Sep-2012 i found 15 Records where this above two fields where not updated
dates where of 01-Sep-2012 to 19-Sep-2012
When i checked on 27-Sep-2012 records increased to 147 and that to of past date. once the date is passed it doesnot get updated while last update date is of past date only.
I have checked procedure and trigger from where the update in this table is done but everything seems to fine.
Kindly suggest can table behave in a such a way??
Should i drop the table and recreating the table will help???

Answer 1

Please find the below code from procedure..
/* EVALUATING ATTENDENCE CODES */
IF P_WORKHRS >= 1 THEN
IF (P_ATNCD1 IN ('B', 'E')) THEN
P_ATNCD1 := 'E';
P_ATNCD2 := 'E';
/* FOLLOWING CONDITION DOESN'T CHANGE ATTENDANCE CODE,TO TRAKE THE OLD-WEEKOFF */
/* FOR THE STAFF AND WORKER ATTENDS DUTY ON WEEKLY OFF */
ELSIF (P_ATNCD1 = 'H') THEN
P_ATNCD1 := 'H';
P_ATNCD2 := 'H';
ELSIF (P_ATNCD1 IN ('P', 'W', 'C', 'N', 'L') AND
P_ATNCD2 NOT IN ('P', 'W', 'C', 'N', 'L')) THEN
P_ATNCD2 := SUBSTR(P_ACTSHIFT, 1, 1);
ELSIF (P_ATNCD1 NOT IN ('P', 'W', 'C', 'N', 'L') AND
P_ATNCD2 IN ('P', 'W', 'C', 'N', 'L')) THEN
P_ATNCD1 := SUBSTR(P_ACTSHIFT, 1, 1);
ELSE
P_ATNCD1 := SUBSTR(P_ACTSHIFT, 1, 1);
P_ATNCD2 := SUBSTR(P_ACTSHIFT, 1, 1);
END IF;
END IF;
insert into atl_tk_errlog values (POST_EMPNO,POST_DATE,P_ATNCD1,P_ATNCD2,'after',sysdate);
BEGIN
UPDATE ATL_TK_MUSTER_DTL
SET MDTLWORKHRS = NVL(P_WORKHRS, 0),
MDTLEARLY = NVL(P_EARLY, 0),
MDTLEXTHRS = NVL(P_EXTHRS, 0),
MDTLATN1 = P_ATNCD1,
MDTLATN2 = P_ATNCD2,
LAST_UPDATE_DATE=SYSDATE
WHERE MDTLEMPNO = POST_EMPNO AND MDTLDATE = POST_DATE;
insert into atl_tk_errlog values (POST_EMPNO,POST_DATE,P_ATNCD1,P_ATNCD2,'after UPDATE',sysdate);
EXCEPTION
WHEN OTHERS THEN
code:=sqlcode;
errm:=sqlerrm;
EXECUTE IMMEDIATE 'UPDATE ATL_TK_MUSTER_DTL SET MDTLWORKHRS=:v1'||
' ,MDTLEARLY=:v2 ,MDTLEXTHRS=:v3 , MDTLATN1=:v4'||
',MDTLATN2=:v5, LAST_UPDATE_DATE=:v6 WHERE MDTLEMPNO=:v7 AND MDTLDATE=:v8'
using NVL(P_WORKHRS, 0),NVL(P_EARLY, 0),NVL(P_EXTHRS, 0),P_ATNCD1,P_ATNCD2,sysdate,POST_EMPNO,POST_DATE;
insert into atl_tk_err(sql_code,sql_err,creation_date,last_update_date )
values('After Exception '||code,errm,sysdate,sysdate);
insert into atl_tk_errlog values (POST_EMPNO,POST_DATE,P_ATNCD1,P_ATNCD2,'after EXCEPTION',sysdate);
END;
Here in atl_tk_errlog i insert data before update statement is called and in both insert value i get the updated value of P_ATNCD1 AND P_ATNCD2 but sometimes in table the values of MDTLATN1 AND MDTLATN2 is getting update while the other columns gets update.
P_ATNCD1 AND P_ATNCD2 is calculated from the above code and it is getting calculated properly as i can see it in table atl_tk_errlog..