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Reasons for receipt (index key ORA-8102 "not found")

So, I have a table with index IDX_ATS_CALC_END_TIME. A column is a timestamp. This column also has a trigger that automatically populates a column when another column is filled or updated (Interval_duration).

Trigger below:

TRIGGER "DATAMART"."TRG_ATS_CALC_END_TIME" 
    BEFORE INSERT OR UPDATE OF INTERVAL_DURATION ON DATAMART.AGG_TIME_SUMMARY
    FOR EACH ROW
    DECLARE
BEGIN
IF :New.INTERVAL_DURATION > 0 THEN
   :New.calc_end_time := :New.start_date_time  + pb_util.secondtointerval(:New.INTERVAL_DURATION);
ELSE
:NEW.CALC_END_TIME := :New.start_date_time;
END IF;

    EXCEPTION
    WHEN OTHERS THEN
      pb_util.logdata(1, 'TRG_ATS_CALC_END_TIME', 'Exception Thrown in interval:  ' || :New.Interval_DURATION, SQLERRM  || ' stack: ' || dbms_utility.format_error_backtrace);

END TRG_ATS_CALC_END_TIME;

When my table is initially filled, there are no problems. My problem is that when I go to insert / update in the table and try to change this column, either directly changing the column, or just updating the interval_duration column, I cause this error:

ORA-08102: index key not found, obj # 97523, file 4, block 244 (2)

The specified index is a function-based index. The function used in the index is sys_extract_utc in the calc_end_time column.

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ANALYZE INDEX IDX_ATS_CALC_END_TIME VALIDATE STRUCTURE;

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UPDATE: pb_util.secondtointerval():

FUNCTION SecondToInterval
  (Seconds_IN NUMBER
  )
RETURN CONST.PBInterval
IS
  sec            NUMBER(20, 9);
  days           NUMBER;
  hours          NUMBER;
  minutes        NUMBER;
  seconds        NUMBER(20, 9);
  IntervalAsText NVARCHAR2(32);
  ReturnInterval INTERVAL DAY(9) TO SECOND(9);
begin
  sec     := NVL(Seconds_IN, 0);

  days    := trunc(sec/(24*60*60));
  sec     := sec - days*24*60*60;

  hours   := trunc(sec/(60*60));
  sec     := sec - hours*60*60;

  minutes := trunc(sec/60);
  sec     := sec - minutes*60;

  seconds := trunc(sec);

  sec     := sec - seconds;
  sec     := trunc(1000000000*sec);

  IntervalAsText := cast(days as nvarchar2)
    || ' ' || cast(hours as nvarchar2)
    || ':' || substr('00' || cast(minutes as nvarchar2), -2, 2)
    || ':' || substr('00' || cast(seconds as nvarchar2), -2, 2)
    || '.' || substr('000000000' || cast(sec as nvarchar2), -9, 9);

  --dbms_output.put_line(intervalastext);

  ReturnInterval := TO_DSInterval(IntervalAsText);
  --ReturnInterval := TO_DSInterval('999999999 23:59:59.999999999');
  --dbms_output.put_line(ReturnInterval);

  RETURN ReturnInterval;
EXCEPTION
    WHEN OTHERS THEN
   pb_util.logdata(1, 'PB_UTIL.SecondToInterval', 'ERROR(99A): ', intervalastext);
                dbms_output.put_line(intervalastext);
                RAISE;

end SecondToInterval;

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, , → pb_util.secondtointerval. , . CALC_END_TIME , .

, :

SQL> CREATE TABLE t (a INTEGER)
Table created.

SQL> CREATE OR REPLACE FUNCTION f (a INTEGER)
   RETURN INTEGER "DETERMINISTIC"
AS
   cnt   INTEGER;
BEGIN
   RETURN ROUND ("DBMS_RANDOM.VALUE (1, 100)");
END f;
Function created.

SQL> CREATE INDEX t_idx ON t (f(a)) COMPUTE STATISTICS
Index created.

SQL> INSERT INTO t
   SELECT ROWNUM
     FROM user_objects
5 rows created.

SQL> DELETE FROM t
DELETE FROM t
Error at line 28
ORA-08102: index key not found, obj# 48928, file 4, block 36 (2)

, !

+3

:

SELECT *
  FROM ALL_OBJECTS
  WHERE OBJECT_ID = 97523

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