[Koha-zebra] date range searches

[henridamien.laurent]

Hi,
I have some problems with date range search.

See :
01345nac a22002891u 4500
090    $9 57382 $a 57382
101    $a fre
100    $a 20080516              frey50
200    $a mytitle $b mytype $f myself
210    $a PublisherName $d 23 Novembre 2007

record.abs contains
melm 210$d    pubdate:n,pubdate:s

So I think that this 210$d should not be indexed, since it is not numerical
But,when doing a range search,
f @and @attr "1=pubdate" @attr 4=109 @attr 2=4 1875 @attr "1=pubdate"
@attr 4=109 @attr 2=2 1876

this title and all the titles which have 210$d not only numerical will
come out.
Is there a way not to get them ?

-- 
Henri-Damien LAURENT
BibLibre SARL
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