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From Dan Armbrust <>
Subject Re: Is a field in use?
Date Thu, 23 Jun 2005 18:37:08 GMT
In my indexes where the available fields vary by document, I maintain an 
additional field that lists out what fields are in used per document.  
That way, I can query for all documents that contain field "foo", or all 
documents that contain a field "foo", and don't contain "bar"... etc.

Avi Drissman wrote:

> Suppose I have an index with a varying number of fields in a  
> document. Some documents have some fields, and some documents have  
> others. Is there a quick way to query the index to see if a  
> particular field name is in use at all by any document in the index?
> For example, if document 1 has fields (A, B, C), document 2 fields  
> (B, C, D), document 3 fields (A, E, F), then document 2 is deleted, I  
> need to be able to answer, "Does any document have field 'D'" with "no".
> Thanks.
> Avi

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