UPDATE with SUBSELECT and ORDER BY
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Hi @ Postgres BUGS...
SITUATION:
I have a Table
id groupid orderby
1 1 10
2 1 20
3 1 30
4 1 40
5 2 10
6 2 20
10 2 30
11 2 40
and a UNIQUE INDEX on columns "groupid,orderby"
now i want to update
UPDATE
orderby SET orderby = orderby +10
WHERE groupid = 1;
-> FAILS because of UNIQUE INDEX
NOW I WANTED TO UPDATE REVERSE:
UPDATE
orderby SET orderby = orderby +10
WHERE groupid IN
( SELECT groupid
FROM TABLE WHERE group_id = 1
ORDER BY orderby DESC )
;
-> FAILS TOO... SEEMS LIKE THE ORDER BY "DESC" WONT BE USED ?!?
This is with Postgres Version 8.0.3
Regards,
Claus Pruefer
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