Year-to-date behaviour when filtered on day-of-week

Question

In our data warehouse design, the time dimension has - amongst others - following columns:
- day id [ = YYYYMMDD format ]
- day of week [ = name of day of week: Monday, Tuesday, ... ]
- week id [ = IYYYIW format ]
- year id [ = IYYY ]
Our fact table, which contains turnover information, has - amongst others - following columns:
- net amount [ = physical table column containing numeric value ]
- net amount ytd [ = logical column: ToDate(net amount, year id) ]
An analysis was built based upon this dimension and fact table, which is filtered with prompted values. Prompts are foreseen for week and day of week.
When filtering on week the behaviour is very much as expected; the "net amount" is assigned the total net amount of the chosen week, and the "net amount ytd" is assigned the total net amount for the year up to the chosen week.
When adding day-of-week to the filter condition however the result is not as expted; the "net amount" is assigned the total net amount for the chosen day in the chosen week, as hoped for, but the "net amount yet" still is assigned the total net amount for the year up to the chosen day of the chosen week, while I would expect it to be the total net amount of all chosen day-of-weeks (for example, all Tuesdays) of the year up to the Tuesday in the chosen week.
Having a look at the query behind the analysis, the (simplified) code for the YTD information looks like this:
SELECT SUM("net amount")
FROM   "fact",
       "time dimension" td1,
       "time dimension" td2
WHERE  td1."week id" = (prompt week value)
AND    td1."day of week" = (prompt day of week value)
AND    td1."year id" = td2."year id"
AND    td2."week id" <= td1."week id"
AND    fact."day id" = td2."day id"As I said, it is simplified, OBIEE in fact uses a bunch of sub queries and ranking sequences to pull this off, but this is in a nutshell the result. And as seen in the query, the second occurence of the time dimension is not filtered on day of week, which results in the YTD sum for all days, not just Tuesdays, or whatever day was selected.
It makes sense in a way, after all, filtering on week does not limit the second occurence of the time dimension to filter on week either. But is there any way to force OBIEE to make an exception and come up with following query (or something similar that does the trick):
SELECT SUM("net amount")
FROM   "fact",
       "time dimension" td1,
       "time dimension" td2
WHERE  td1."week id" = (prompt week value)
AND    td1."day of week" = (prompt day of week value)
AND    td1."year id" = td2."year id"
AND    td2."week id" <= td1."week id"
AND    td2."day of week" = (prompt day of week value)
AND    fact."day id" = td2."day id"Thanks in advance for your input.
Edited by: Kurt Geens on Mar 12, 2013 2:52 PM

Answer 1

805771 wrote:
Yes, but I don't want to create 7 different jobs, one for each day of the week. Isn't there a way to do this in PL/SQL? It took me 10 seconds in SQL Server's TSQL.Yes you keep showing some TSQL syntax that obviously does not do what you are asking for.
>
SELECT
CASE DATEPART(dw,GETDATE())
WHEN 4 THEN (SELECT COUNT(*) FROM ADR_VLDN )
ENDSo the equivalent in Oracle would be
SQL> var n number
SQL> begin
  2    if to_char(sysdate,'D') = '4' then
  3      select count(*) into :n from dual;
  4    end if;
  5  end;
  6  /
PL/SQL procedure successfully completed.
SQL> print n
         N
         1Also takes 10 seconds.