Stacked Column Report bug when one series has zero for data

Question

Hi,
I'm encountering an issue with the stacked charts. In my chart, I want to show the total of active and expired records for each year. I created a series for each, and the SQL for them is below:
Active (1st series created):
select '' link,to_char(preparedate,'YYYY') label,count(*) Active
from cts.contract
where preparedate is not null and
to_char(preparedate,'YYYY')>to_char(sysdate,'YYYY')-10
and expired = 0
group by '',to_char(preparedate,'YYYY')
order by '',to_char(preparedate,'YYYY')
Expired (2nd series):
select '' link,to_char(preparedate,'YYYY') label,count(*) Expired
from cts.contract
where preparedate is not null and
to_char(preparedate,'YYYY')>to_char(sysdate,'YYYY')-10
and expired = 1
group by '',to_char(preparedate,'YYYY')
order by '',to_char(preparedate,'YYYY')
When I see the chart output, I expect the chart to show the stacked columns with expired stacked on top of active, and ordered by year. However, for the two years in our database where there are no active (series 1) records, only expired (series 2) ones, these bars are displayed to the right of the other years. Oddly, for the year where all records are active, and none are expired, there is a sliver at the top of the bar for that year showing as the color for expired, and hovering over that portion of the bar displays zero. I understand that with the other two years where the series with zero would be stacked on the bottom, and therefore not visible, but why does the chart put these years after the other ones that are in order? Since my records are from 1998-2007, and the two years without series 1 records (active) are 1999 and 2002, the years are shown in this order: 1998, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 1999, 2002.
Any help with how to make these two years show in the correct order with the others is appreciated.
Thanks,
Brian

Answer 1

After switching from Thin driver to OCI the problem went away.