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From: "Mattmann, Chris A (388J)" <chris.a.mattmann@jpl.nasa.gov>
To: "solr-dev@lucene.apache.org" <solr-dev@lucene.apache.org>
CC: "yonik@lucidimagination.com" <yonik@lucidimagination.com>
Date: Fri, 11 Dec 2009 06:53:45 -0800
Subject: Re: SOLR-1131: disconnect between fields created by poly fields
Thread-Topic: SOLR-1131: disconnect between fields created by poly fields
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Hi Grant:

> By declaring the poly field, you are declaring the dynamic field.  I don'=
t see
> why this leads to drift.  Sure, it is an abstraction and their are Lucene
> fields that will be created under the hood, but that is one of the primar=
y
> features of Solr, it hides all that mess.

Actually if it was the case that poly field mapped to a single dynamic
field, then I would agree with you, but as is the discussion, poly field ca=
n
map to _many_ dynamic fields, which is where the drift occurs.

Also, the drift does not occur in the sense that there are more Lucene
fields created (fields of course, are Lucene concepts, which true, SOLR
should serve as an abstraction to) -- it's in the sense that there are more
"dynamic fields" (which are of course, a SOLR concept, and which I'm not
sure that SOLR should serve as an abstraction to, and if it does, then
schema.xml can be out of sync).

So, in other words, with the current thinking, you can have dynamic fields
that are created by a poly field that have could have no corresponding entr=
y
in schema.xml. That's my point. I think we should enforce that there be an
entry in schema.xml to prevent this drift.

Cheers,
Chris

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Chris Mattmann, Ph.D.
Senior Computer Scientist
NASA Jet Propulsion Laboratory Pasadena, CA 91109 USA
Office: 171-266B, Mailstop: 171-246
Email: Chris.Mattmann@jpl.nasa.gov
WWW:   http://sunset.usc.edu/~mattmann/
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Adjunct Assistant Professor, Computer Science Department University of
Southern California, Los Angeles, CA 90089 USA
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++