SQL Dev Report Type Confusion

Question

Following an article by Sue Harper originally published in the May/June 2007 Oracle magazine, I have finally been able to construct a hierarchy of Drill-Down reports. My original attempts to create such reports failed, because in my version of SQL Dev 1.5.4 I could not see how to specify a "Report ID" as Sue had documented. Following instructions on other posts I have found, including a bind variable in the drill-down query appears to resolve this problem.
I can also use the "Add Child" button on a parent report definition to add reports which also use bind variables, and which then appear as clickable tabs below the parent report. When defining such a child report, I can choose a type of "Detail" or "Child".
My questions are these:
1. What is the difference between a drill-down report as described by Sue, and a Child report defined when the "Add Child" button is clicked, other than where the report appears on the Oracle SQL Dev window?
2. When defining a Child report after clicking "Add Child", what is the difference between a type of "Detail" and "Child"?
Sorry if this has already been clearly explained elsewhere. Links to relevant doco will be much appreciated!
TIA,
Jon

Answer 1

Hello,
Is it possible to have a "chart" report that expands to multiple child "chart" reports with the bind variable from the 1st child report passed to the 2nd child report?
The bind variable from the 1st child report is not being passed to the 2nd child report.
In the sample below, I would like to display a count of objects created by day. When clicking on the object_type/count/day, it displays a child chart with the object_type by hour. What's not working is, when I select the object_type, the 2nd child chart is not displaying the object_type created for that hour (:TIME2) because it is not being recognized/passed to the chart.
Below is the sql and sqldeveloper report options I'm using. Thanks in advance for your help.
-- Master - bar_vert_stack chart of objects created by day:
select
to_char(trunc(created,'dd'),'mmddyyyy') TIME1,
object_type OBJECT_TYPE1,
count(*)
from all_objects
group by
to_char(trunc(created,'dd'),'mmddyyyy'),
object_type
order by
to_char(trunc(created,'dd'),'mmddyyyy') desc
-- Child1 - bar_vert_stack chart of objects created by hour that appears when selecting the day above:
select
to_char(trunc(created,'hh24'),'mmddyyyy hh24:mi:ss') TIME2,
object_type OBJECT_TYPE2,
count(*)
from all_objects
where
object_type=:OBJECT_TYPE1
and created between to_date(:TIME1,'mmddyyyy hh24:mi:ss') and (to_date(:TIME1,'mmddyyyy hh24:mi:ss')+1)
group by
to_char(trunc(created,'hh24'),'mmddyyyy hh24:mi:ss'),
object_type
order by
TIME2 desc
-- Child2 - table of objects created in the hour that appears when selecting the day above (note that :TIME2 is not being passed so all
--recs for that day are displayed)
select
:TIME1,:OBJECT_TYPE1,:TIME2,:OBJECT_TYPE2,all_objects.*
from all_objects
where
object_type=:OBJECT_TYPE1
and created
between to_date(:TIME1,'mmddyyyy hh24:mi:ss')
and (to_date (:TIME1,'mmddyyyy hh24:mi:ss')+1)
order by created desc