[Koha-devel] DB design (MARC structure)
Joshua Ferraro
jferraro at athenscounty.lib.oh.us
Mon Jun 14 04:41:01 CEST 2004
If I understand it correctly this sounds like a great solution to
our speed issues with the current marc searching--and it won't
compromise the accuracy of the search either. Let's do it.
Joshua
On Mon, Jun 14, 2004 at 10:59:03AM +0200, Paul POULAIN wrote:
> Hello all,
>
> Nelsonville & me are trying to optimize queries.
> I'm concluding we should modify a little the DB :
> * marc_word has "tag", "subfield" and "word" fields.
> * we are querying on /tag+subfield in ('200a','245f') and word like
> 'tower%'/ . Such a query CANNOT be optimised by mySQL.
> * so, an index on /(tag, subfield,word)/ is not used.
> * I think we could highly optimize the search with a field called
> 'tagsubfield', an index on /(tagsubfield,word)/. The search being
> /tagsubfield in ('200a','245f') and word like 'tower%'/.
>
> Other searches (a search on "keyword", that does is done only on word,
> not on tag+subfield) will still be working fast, with index on (word)
>
> Does this make sense ? Any comment ?
> if yes, i'll do it (for friday).
>
> --
> Paul POULAIN
> Consultant indépendant en logiciels libres
> responsable francophone de koha (SIGB libre http://www.koha-fr.org)
>
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