AVERAGE on crosstable with NULLs

Question

Hi,
I try to set average function on column in crosstable. Data contains NULLs. I got error during displaing report in HTML format (in Interactive format it's ok) - "oracle.xdo.XDOException: java.lang.reflect.InvocationTargetException".
Oracle support says Publisher is not working with NULLs in crosstable - but in Interactive View it's ok (almost - I see NaN instead of empty/NULL value).
This simple query and some data:
SELECT
'Group' || ROUND((LEVEL+1)/4) "GROUP",
'Row' || LEVEL "ROW",
TRUNC(CURRENT_DATE) "DATE",
LEVEL VALUE1,
CASE WHEN mod(LEVEL,2) = 0 THEN LEVEL+LEVEL ELSE CAST(NULL AS NUMBER) END VALUE2
FROM DUAL CONNECT BY LEVEL <= 9;
GROUP | ROW | DATE | VALUE1 | VALUE2
Group1 | Row1 | 2011-08-02 | 1 |
Group1 | Row2 | 2011-08-02 | 2 | 4
Group1 | Row3 | 2011-08-02 | 3 |
Group1 | Row4 | 2011-08-02 | 4 | 8
In pure SQL i get correct result:
SELECT "GROUP",
AVG(VALUE1),
AVG(VALUE2)
FROM (
          SELECT 'Group' || ROUND((LEVEL+1)/4) "GROUP",
               'Row' || LEVEL "ROW",
               TRUNC(CURRENT_DATE) "DATE",
               LEVEL VALUE1,
               CASE WHEN mod(LEVEL,2) = 0 THEN LEVEL+LEVEL ELSE CAST(NULL AS NUMBER) END VALUE2
          FROM DUAL CONNECT BY LEVEL <= 9
GROUP BY "GROUP"
Edited by: stashek on 2011-08-08 23:37

Answer 1

A step is a dimension, which represents date.
User is prompted to choose possible period from such:
25 months with step of 6 months
13 months with step of 1 month
1 day with step of 1 hour
I have a special view in DB, which calculates each step, e.g. for period "1 month with step 1 day":
Name              StartDate           EndDate                 Step                    Number
1 month         2014-06-11         2014-07-11          2014-06-12            IM1000000
1 month         2014-06-11         2014-07-11          2014-06-13            IM1000001
1 month         2014-06-11         2014-07-11          2014-06-13            IM1000002
So what I am doing, is calculating Count of Number ForEach step.
Then I add field Resolution Code from another table, and thus I get my chart.
Basically, what I need to have as trend line is Average Count for Each Step despite Resolution Code.
Hope, this makes my issue clearer.
P.S. =Average(Count(Number) foreach([Step])) in Report isn't helping, the issue is the same.