[Koha] Report Help

[Ian Walls]

Unfortunately, that's just the way that ExtractValue works.  From the
manual:

If multiple matches are found, the content of the first child text node of
each matching element is returned (in the order matched) as a single,
space-delimited string.

Since MARC doesn't give us any means of differentiating between the multiple
fields aside from their order, there isn't much that can be done here.  And
if the desired 610 field isn't the first in the series of them, the LIKE
clause won't match; you'd need % in front, as well.

MARC for the fail.. :(


-Ian

2011/7/1 Chris Nighswonger <cnighswonger at foundations.edu>

> Hi Nicole,
>
>
> On Fri, Jul 1, 2011 at 9:33 AM, Nicole Engard <nengard at gmail.com> wrote:
>
>> Hi all,
>>
>> I wrote this report to get all subject headings in a Koha system that
>> start with key phrases:
>>
>> SELECT lcsh
>> FROM
>> (SELECT biblionumber,
>> ExtractValue(marcxml,'//datafield[@tag="610"]/subfield[@code>="a"]')
>> AS lcsh FROM biblioitems)
>> AS subjects
>> WHERE lcsh
>> LIKE "College%"
>> OR lcsh LIKE "Seminary%"
>> GROUP BY lcsh
>>
>>
>> What's happening is if there is more than one 610 on a bib record it's
>> showing them both on one line.  I tried using DISTINCT, but that's
>> didn't do the trick, so I'm up for ideas.
>>
>
> I did some work with ExtractValue and marcxml a while back and IIRC this
> has to do with the way ExtractValue returns the data from the xml. I was
> unable to find a workaround at the time, but perhaps someone else has found
> one.
>
> Kind Regards,
> Chris
>
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>


-- 
Ian Walls
Lead Development Specialist
ByWater Solutions
ALA Booth 732
Phone # (888) 900-8944
http://bywatersolutions.com
ian.walls at bywatersolutions.com
Twitter: @sekjal
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