Help with CASE ORDER BY...

Question

Need to use a CASE in my order by..similiar to sql server syntax. It works fine in sql server but am getting strange errors in oracle.
Can someone look at my sql order:
CREATE OR REPLACE PROCEDURE RSP_RELEASE_TASKS_BY_WEEK
     IN_SUBJECT IN varchar2 :=NULL,
     IN_AUTHOR IN varchar2 :=NULL,
     IN_PROJECTNAME IN varchar2 :=NULL,
     IN_CATEGORY varchar2 :=NULL,
     IN_STARTDATE date :=NULL,
     IN_ENDDATE date :=NULL,
     p_cursor out types.sqlcur
AS
BEGIN
SELECT       
          To_Char(pt.EXPECTED_START_DATE, 'ww') AS WEEKNUMB,
          pt.TEXT_29,
          COUNT(pt.TEXT_29) as CountOfTask
FROM
          PROJ_TASK pt
INNER JOIN
          PROJECT p ON
               p.PROJECTID=pt.PROJECTID
WHERE
(pt.EXPECTED_START_DATE BETWEEN IN_STARTDATE AND IN_ENDDATE OR IN_STARTDATE IS NULL)
AND (p.SUBJECT = IN_SUBJECT OR IN_SUBJECT IS NULL OR IN_SUBJECT='All')
AND (p.AUTHOR = IN_AUTHOR OR IN_AUTHOR IS NULL OR IN_AUTHOR='All')
AND (p.PROJECTNAME = IN_PROJECTNAME OR IN_PROJECTNAME IS NULL OR IN_PROJECTNAME='All')
AND (IN_CATEGORY IS NULL OR p.CATEGORY = IN_CATEGORY OR IN_CATEGORY='All')
AND (pt.TASK_TYPE = 0)
AND (pt.TASK_STATUS <> 2)
AND (p.PROJECT_TYPE = 2) 
AND
     pt.TEXT_29= 'RLL-M' OR
     pt.TEXT_29='RXLL' OR
     pt.TEXT_29='RLL-E' OR
     pt.TEXT_29='BOM-E' OR
     pt.TEXT_29='RLL-F' OR
     pt.TEXT_29='R-GM' OR
     pt.TEXT_29='BOM-F' OR
     pt.TEXT_29 = 'BOM-M' OR
     pt.TEXT_29 = 'REC' OR
     pt.TEXT_29= 'S-BOM-M' OR
     pt.TEXT_29='S-BOM-E' OR
     pt.TEXT_29='S-REC'
AND      pt.TASK_STATUS <> 2
GROUP BY 
     To_Char(pt.EXPECTED_START_DATE, 'ww'), pt.TEXT_29;
ORDER BY
     CASE
          WHEN pt.TEXT_29 = 'BOM-E' THEN 'a'
          WHEN pt.TEXT_29 = 'BOM-M' THEN 'b'
          WHEN pt.TEXT_29 = 'BOM-F' THEN 'c'
          WHEN pt.TEXT_29 = 'R-GM' THEN 'd'
          WHEN pt.TEXT_29 = 'RLL-E' THEN 'e'
          WHEN pt.TEXT_29 = 'RLL-F' THEN 'f'
          WHEN pt.TEXT_29 = 'RLL-M' THEN 'g'
          WHEN pt.TEXT_29 = 'RXLL' THEN 'h'
          WHEN pt.TEXT_29 =  'REC' THEN 'i'
          WHEN pt.TEXT_29 = 'S-BOM-M' THEN 'j'
          WHEN pt.TEXT_29 = 'S-BOM-E' THEN 'k'
          WHEN pt.TEXT_29 = 'S-REC' THEN 'l'
     END, To_Char(pt.EXPECTED_START_DATE, 'ww'), pt.TEXT_29;
END;
/Thanks,
Jon

Answer 1

Those errors are strange, I have never seen invisible errors before.
In theory case in order by works
SQL> select * from dual
  2  order by case when 1 = 1 then 'a'
  3           when 1 = 2 then 'b' end;
D
X