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From Kerwin <kerwin...@gmail.com>
Subject Re: advice on creating a solr index when data source is from many unrelated db tables
Date Sun, 01 Aug 2010 08:21:38 GMT
Hi,

This is something that I am working on too.I have been trying to combine
results from 3 different tables and trying to avoid the usual SQL union
clauses.
One thing I have tried to do is watch out for common fields like, for
example, first name and last name that could be present in all tables and
then map the similar fields from different tables in data-config.xml to the
same two Schema fields for names. I too have realised that using record type
is a good idea to filter on the results and perhaps make the search faster
by filtering on type.
On Fri, Jul 30, 2010 at 9:58 AM, S Ahmed <sahmed1020@gmail.com> wrote:

> So I have tables like this:
>
> Users
> UserSales
> UserHistory
> UserAddresses
> UserNotes
> ClientAddress
> CalenderEvent
> Articles
> Blogs
>
> Just seems odd to me, jamming on these tables into a single index.  But I
> guess the idea of using a 'type' field to quality exactly what I am
> searching is a good idea, in case I need to filter for only 'articles' or
> blogs or contacts etc.
>
> But there might be 50 fields if I do this no?
>
>
>
> On Fri, Jul 30, 2010 at 4:01 AM, Chantal Ackermann <
> chantal.ackermann@btelligent.de> wrote:
>
> > Hi Ahmed,
> >
> > fields that are empty do not impact the index. It's different from a
> > database.
> > I have text fields for different languages and per document there is
> > always only one of the languages set (the text fields for the other
> > languages are empty/not set). It works all very well and fast.
> >
> > I wonder more about what you describe as "unrelated data" - why would
> > you want to put unrelated data into a single index? If you want to
> > search on all the data and return mixed results there surely must be
> > some kind of relation between the documents?
> >
> > Chantal
> >
> > On Thu, 2010-07-29 at 21:33 +0200, S Ahmed wrote:
> > > I understand (and its straightforward) when you want to create a index
> > for
> > > something simple like Products.
> > >
> > > But how do you go about creating a Solr index when you have data coming
> > from
> > > 10-15 database tables, and the tables have unrelated data?
> > >
> > > The issue is then you would have many 'columns' in your index, and they
> > will
> > > be NULL for much of the data since you are trying to shove 15 db tables
> > into
> > > a single Solr/Lucense index.
> > >
> > >
> > > This must be a common problem, what are the potential solutions?
> >
> >
> >
> >
>

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