Problem noticed after applying 10.2.0.3.0 patch

Question

Hi
Can anyone please confirm this?
After the 10.2.0.3.0 patch was applied the following query that was executing correctly before the patch is throwing an error that - "A.Idc is an invalid Identifier" in the query that has the DateDiff function.
UPDATE SAMPLE A
SET Sample_Col = SELECT (CASE WHEN EXISTS (SELECT      Y.End_Date
          FROM      SAMPLEB X, SAMPLEC Y
WHERE      X.Idc = A.Idc
                                                                      AND      X.Mth      = Y.Mth
                                                                      AND          X.IND      = 'N' )
THEN DateDiff('mm', (SELECT * FROM (SELECT Y.End_Date
FROM SAMPLEB X, SAMPLEC Y
WHERE X.Idc = A.Idc
AND X.Mth = Y.Mth
                                                                                AND          X.IND = 'N'
ORDER BY X.Mth DESC)
WHERE ROWNUM <=1), ld_EndDate)
                              ELSE DateDiff('mm', ld_MinDate, ld_MaxDate)
END)
WHERE EXISTS
     (Select 1
     FROM SAMPLEB B
     WHERE A.Idc = B.Idc
     AND     A.Ind = 'Y');

Answer 1

Hi
I am able to select and describe the table. There are no problems with that. I am just guessing would it be a problem with the A.Idc being refferred inside 2 levels from where the Alias was defined. As a workaround I have rewritten my query such that I just have one inner brackets and it works. But i still dont understand why the orginal version does not work now. This error occurs in all packages that have such a query with 2 inner levels. Otherwise everything else seems ok.
Any help is appreciated.