2011/1/3 Alexander Farber <alexander.farber@gmail.com>:
> Hello,
>
> through some obscure error (probably on my side)
> I have several thousand entries for Jan 1 and Jan 2
> ending up in the ISO week 2011-52 instead of 2010-52
> which breaks the bar chart at the top of my script
> http://preferans.de/user.php?id=OK504891003571
>
> # select * from pref_money where id='OK324712148886';
> id | money | yw
> ----------------+-------+---------
> OK324712148886 | 203 | 2010-46
> OK324712148886 | 219 | 2010-49
> OK324712148886 | 115 | 2010-51
> OK324712148886 | 63 | 2010-52
> OK324712148886 | 20 | 2011-01
> OK324712148886 | 10 | 2011-52
>
> # \d pref_money
> Table "public.pref_money"
> Column | Type | Modifiers
> --------+-----------------------+-----------------------------------------
> id | character varying(32) |
> money | integer | not null
> yw | character(7) | default to_char(now(), 'YYYY-IW'::text)
> Indexes:
> "pref_money_yw_index" btree (yw)
> Foreign-key constraints:
> "pref_money_id_fkey" FOREIGN KEY (id) REFERENCES pref_users(id)
>
> I would like to fix that problem by adding
> 2011-52 values of money (10 above) to the
> 2010-52 values of money (63 above, should become 73)
> and then dropping all rows with the
> wrong week number yw='2011-52'.
>
> So I'm trying:
>
> # update pref_money set money=money+
> (select money from pref_money where yw='2011-52')
> where yw='2010-52';
> ERROR: more than one row returned by a subquery used as an expression
>
> ok, I probably need to specify the id for the subquery
> in round brackets above - so I try again:
>
> # update pref_money as m1 set money=money+
> (select coalesce(money,0) from pref_money as m2
> where m1.id=m2.id and m2.yw='2011-52')
> where m1.yw='2010-52';
> ERROR: null value in column "money" violates not-null constraint
update tab set money = money + COALESCE((SELECT ...) , 0) ..
Regards
Pavel Stehule
>
> Can anybody please help me here?
>
> Thank you
> Alex
>
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