SQL expression in ODI

Question

I Have the following interface in oracle data integrator
http://i44.tinypic.com/2mrsmxt.png
# it execute successfully before inserting the following expression 
  In the mapping I insert the following SQL expression to get the average when the quantity is 0
AVG(
CASE WHEN TEST.QUN = 0 THEN
(SELECT TEST.QUN FROM TEST
WHERE TEST1.PRUDU=TEST.PRUDU
AND TEST1.FLOW=TEST.UNIT
AND TEST1.UNIT=TEST.UNIT
AND to_char(TEST.DATEDDD,'MON')= to_char(TEST1.DATEDDD,'MON')
AND TEST1.DATEDDD !=TEST.DATEDDD
GROUP BY TEST.QUN
ELSE TEST.QUN
END)
when I check this expression in ODI ..
# the sql expression is correct for this  RDMS 
when I executed the interface i get this error
Caused By: java.sql.SQLSyntaxErrorException: ORA-00937: not a single-group group function
any idea ?

Answer 1

I changed the code a little ..
CASE WHEN TEST.QUN = 0 THEN
(SELECT AVG(TEST.QUN) FROM TEST
WHERE TEST1.PRUDU=TEST.PRUDU
AND TEST1.FLOW=TEST.FLOW
AND TEST1.UNIT=TEST.UNIT
AND to_char(TEST.DATEDDD,'MON')= to_char(TEST1.DATEDDD,'MON')
AND to_char(TEST.DATEDDD,'YYYY')!= to_char(TEST1.DATEDDD,'YYYY')
ELSE TEST.QUN
END
And I get this error ..
ORA-01427: single-row subquery returns more than one row tips.
The TEST Table from the source and TEST1 is a lookup table because I couldn't  do the alais in ODI
In sql developer I did the following code that will do the same thing and work successfully ..
update test B
set B.qun=
(SELECT AVG(TEST.QUN) FROM TEST
WHERE  TEST.FLOW=B.UNIT
AND TEST.UNIT=B.UNIT
AND TEST.PRUDU=b.prudu
AND TEST.FLOW=b.flow
AND to_char(TEST.DATEDDD,'MON')= to_char(B.DATEDDD,'MON')
AND to_char(TEST.DATEDDD,'YYYY')!= to_char(B.DATEDDD,'YYYY')
where B.qun=0;
any help ?
thanksssss
naif ..