Bugs item #1960373, was opened at 2008-05-08 18:08
Message generated for change (Comment added) made by stmane
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Category: Core
Group: MonetDB Common 1.24
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Sjoerd Mullender (sjoerd)
Assigned to: Peter Boncz (boncz)
Summary: kunion and nil
Initial Comment:
mil>var a := new(void,oid).append(oid(nil)).append([EMAIL PROTECTED]).tunique();
mil>a.info().find("hkey").print();
[ "1" ]
mil>var b := kunion(a,a);
mil>b.info().find("hkey").print();
[ "1" ]
mil>b.print();
#-----------------#
# h t # name
# oid void # type
#-----------------#
[ nil, nil ]
[ [EMAIL PROTECTED], nil ]
[ nil, nil ]
If run with debugmask 10, BATpropcheck complains about b having hkey set.
The questions are:
- is tunique right in setting hkey, even in the presence of a nil?
- is kunion right in producing three values (since nil != nil)?
- is kunion right in setting hkey (again since nil != nil)?
- is BATpropcheck right in complaining that hkey is set (since nil = nil, or
perhaps because hkey should never be set in the presence of nils)?
----------------------------------------------------------------------
>Comment By: Stefan Manegold (stmane)
Date: 2008-08-26 09:20
Message:
Logged In: YES
user_id=572415
Originator: NO
See also
[ 2075180 ] the unique column can't insert more than 1 row with null
http://sourceforge.net/tracker/index.php?func=detail&aid=2075180&group_id=56967&atid=482468
----------------------------------------------------------------------
Comment By: Sjoerd Mullender (sjoerd)
Date: 2008-06-05 16:22
Message:
Logged In: YES
user_id=43607
Originator: YES
Peter, I'd like you to give your opinion on this issue.
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https://sourceforge.net/tracker/?func=detail&atid=482468&aid=1960373&group_id=56967
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