Merging 2 indexes

[Andre Rubin <an...@gmail.com>]

Hey all

I have 2 indexes. Both have an ID field and one or more String fields... I
want to merge these indexes by merging the documents on each index that
match their IDs.

For exmaple:

Index 1:
Doc1:
id: 1234 (*)
text:bla bla
text:abcd


Index2:
DocA:
id:1234 (*)
text:xyz

(*) ID's match

So I wanna merge these documents in a new (or add it to an existing) index,
like this:


New Index:
Doc1:
id: 1234
text:bla bla
text:abcd
text:xyz

Is there a way to do that in an efficient way, like not having to manually
traverse each?

Thanks,


Andre

Re: Merging 2 indexes

[Karl Wettin <ka...@gmail.com>]

30 aug 2008 kl. 09.42 skrev Andre Rubin:

> I have 2 indexes. Both have an ID field and one or more String  
> fields... I
> want to merge these indexes by merging the documents on each index  
> that
> match their IDs.

> Is there a way to do that in an efficient way, like not having to  
> manually
> traverse each?

No. I recommend you go to the data sources and build your merged index  
from scratch. Otherwise you would have to extract the data from the  
inverted index or get them via the term vectors (if you made them  
available at index time). TermVectorAccessor in trunk/contrib/ 
miscellaneous can help you with that. Last option is if you stored all  
the source data in your documents and you know what analyzer you used  
to tokenize it with.


       karl



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